forked from D-Net/dnet-hadoop
Minor updates to the copying operation to Impala Cluster:
- Improve logging. - Code optimization/polishing.
This commit is contained in:
parent
14719dcd62
commit
d7da4f814b
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@ -11,7 +11,7 @@ export HADOOP_USER_NAME=$2
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# Set the active HDFS node of OCEAN and IMPALA cluster.
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OCEAN_HDFS_NODE='hdfs://nameservice1'
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echo "OCEAN HDFS virtual-name which resolves automatically to the active-node: ${OCEAN_HDFS_NODE}"
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echo -e "\nOCEAN HDFS virtual-name which resolves automatically to the active-node: ${OCEAN_HDFS_NODE}"
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IMPALA_HDFS_NODE=''
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COUNTER=0
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@ -29,10 +29,10 @@ while [ $COUNTER -lt 3 ]; do
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((COUNTER++))
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done
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if [ -z "$IMPALA_HDFS_NODE" ]; then
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echo -e "\n\nPROBLEM WHEN SETTING THE HDFS-NODE FOR IMPALA CLUSTER! | AFTER ${COUNTER} RETRIES.\n\n"
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echo -e "\n\nERROR: PROBLEM WHEN SETTING THE HDFS-NODE FOR IMPALA CLUSTER! | AFTER ${COUNTER} RETRIES.\n\n"
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exit 1
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fi
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echo "Active IMPALA HDFS Node: ${IMPALA_HDFS_NODE} , after ${COUNTER} retries."
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echo -e "Active IMPALA HDFS Node: ${IMPALA_HDFS_NODE} , after ${COUNTER} retries.\n\n"
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IMPALA_HOSTNAME='impala-cluster-dn1.openaire.eu'
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IMPALA_CONFIG_FILE='/etc/impala_cluster/hdfs-site.xml'
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@ -59,12 +59,13 @@ LOCATION_SED_ARG_3='s/\.location[[:space:]]/\.\`location\` /g'
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function copydb() {
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db=$1
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echo -e "\nStart processing db: '${db}'..\n"
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# Delete the old DB from Impala cluster (if exists).
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impala-shell --user ${HADOOP_USER_NAME} -i ${IMPALA_HOSTNAME} -q "drop database if exists ${db} cascade" |& tee error.log # impala-shell prints all logs in stderr, so wee need to capture them and put them in a file, in order to perform "grep" on them later
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log_errors=`cat error.log | grep -E "WARN|ERROR|FAILED"`
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if [ -n "$log_errors" ]; then
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echo -e "\n\nTHERE WAS A PROBLEM WHEN DROPPING THE OLD DATABASE! EXITING...\n\n"
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echo -e "\n\nERROR: THERE WAS A PROBLEM WHEN DROPPING THE OLD DATABASE! EXITING...\n\n"
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rm -f error.log
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return 1
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fi
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@ -73,7 +74,7 @@ function copydb() {
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sleep 1
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impala-shell --user ${HADOOP_USER_NAME} -i ${IMPALA_HOSTNAME} -q "INVALIDATE METADATA"
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echo "Copying $db files from Ocean to Impala cluster.."
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echo -e "\n\nCopying files of '${db}', from Ocean to Impala cluster..\n"
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# Using max-bandwidth of: 50 * 100 Mb/s = 5 Gb/s
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# Using max memory of: 50 * 6144 = 300 Gb
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# Using 1MB as a buffer-size.
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@ -89,9 +90,9 @@ function copydb() {
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# Check the exit status of the "hadoop distcp" command.
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if [ $? -eq 0 ]; then
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echo "Successfully copied the files of '${db}'."
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echo -e "\nSuccessfully copied the files of '${db}'.\n"
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else
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echo "Failed to transfer the files of '${db}', with 'hadoop distcp'. Got with exit status: $?"
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echo -e "\n\nERROR: FAILED TO TRANSFER THE FILES OF '${db}', WITH 'hadoop distcp'. GOT WITH EXIT STATUS: $?\n\n"
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rm -f error.log
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return 2
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fi
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@ -99,7 +100,7 @@ function copydb() {
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# In case we ever use this script for a writable DB (using inserts/updates), we should perform the following costly operation as well..
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#hdfs dfs -conf ${IMPALA_CONFIG_FILE} -chmod -R 777 ${TEMP_SUBDIR_FULLPATH}/${db}.db
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echo "Creating schema for ${db}"
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echo -e "\nCreating schema for db: '${db}'\n"
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# create the new database (with the same name)
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impala-shell --user ${HADOOP_USER_NAME} -i ${IMPALA_HOSTNAME} -q "create database ${db}"
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@ -111,31 +112,31 @@ function copydb() {
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# Because "Hive" and "Impala" do not have compatible schemas, we cannot use the "show create table <name>" output from hive to create the exact same table in impala.
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# So, we have to find at least one parquet file (check if it's there) from the table in the ocean cluster for impala to use it to extract the table-schema itself from that file.
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all_create_view_commands=()
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all_create_view_statements=()
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entities_on_ocean=`hive -e "show tables in ${db};" | sed 's/WARN:.*//g'` # Get the tables and views without any potential the "WARN" logs.
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for i in ${entities_on_ocean[@]}; do # Use un-quoted values, as the elemetns are single-words.
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# Check if this is a view by showing the create-command where it should print "create view" for a view, not the "create table". Unfortunately, there is now "show views" command.
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create_entity_command=`hive -e "show create table ${db}.${i};"` # It needs to happen in two stages, otherwise the "grep" is not able to match multi-line command.
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# Check if this is a view by showing the create-statement where it should print "create view" for a view, not the "create table". Unfortunately, there is no "show views" command.
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create_entity_statement=`hive -e "show create table ${db}.${i};"` # It needs to happen in two stages, otherwise the "grep" is not able to match multi-line statement.
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create_view_command_test=`echo -e "$create_entity_command" | grep 'CREATE VIEW'`
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if [ -n "$create_view_command_test" ]; then
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echo -e "\n'${i}' is a view, so we will save its 'create view' command and execute it on Impala, after all tables have been created.\n"
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create_view_command=`echo -e "$create_entity_command" | sed 's/WARN:.*//g' | sed 's/\`//g' \
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create_view_statement_test=`echo -e "$create_entity_statement" | grep 'CREATE VIEW'`
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if [ -n "$create_view_statement_test" ]; then
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echo -e "\n'${i}' is a view, so we will save its 'create view' statement and execute it on Impala, after all tables have been created.\n"
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create_view_statement=`echo -e "$create_entity_statement" | sed 's/WARN:.*//g' | sed 's/\`//g' \
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| sed 's/"$/;/' | sed 's/^"//' | sed 's/\\"\\"/\"/g' | sed -e "${LOCATION_HDFS_NODE_SED_ARG}" | sed "${DATE_SED_ARG_1}" | sed "${HASH_SED_ARG_1}" | sed "${LOCATION_SED_ARG_1}" \
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| sed "${DATE_SED_ARG_2}" | sed "${HASH_SED_ARG_2}" | sed "${LOCATION_SED_ARG_2}" \
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| sed "${DATE_SED_ARG_3}" | sed "${HASH_SED_ARG_3}" | sed "${LOCATION_SED_ARG_3}"`
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all_create_view_commands+=("$create_view_command")
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all_create_view_statements+=("$create_view_statement")
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else
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echo -e "\n'${i}' is a table, so we will check for its parquet files and create the table on Impala cluster.\n"
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CURRENT_PRQ_FILE=`hdfs dfs -conf ${IMPALA_CONFIG_FILE} -ls -C "${IMPALA_HDFS_DB_BASE_PATH}/${db}.db/${i}/" | grep -v 'Found' | grep -v '_impala_insert_staging' | head -1`
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if [ -z "$CURRENT_PRQ_FILE" ]; then # If there is not parquet-file inside.
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echo -e "\n\nTHE TABLE \"${i}\" HAD NO PARQUET FILES TO GET THE SCHEMA FROM! IT'S EMPTY!\n\n"
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echo -e "\nERROR: THE TABLE \"${i}\" HAD NO FILES TO GET THE SCHEMA FROM! IT'S EMPTY!\n\n"
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else
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impala-shell --user ${HADOOP_USER_NAME} -i ${IMPALA_HOSTNAME} -q "create table ${db}.${i} like parquet '${CURRENT_PRQ_FILE}' stored as parquet;" |& tee error.log
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log_errors=`cat error.log | grep -E "WARN|ERROR|FAILED"`
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if [ -n "$log_errors" ]; then
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echo -e "\n\nTHERE WAS A PROBLEM WHEN CREATING TABLE '${i}'!\n\n"
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echo -e "\n\nERROR: THERE WAS A PROBLEM WHEN CREATING TABLE '${i}'!\n\n"
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fi
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fi
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fi
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@ -143,65 +144,62 @@ function copydb() {
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echo -e "\nAll tables have been created, going to create the views..\n"
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# Make Impala aware of the new tables.
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sleep 1
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impala-shell --user ${HADOOP_USER_NAME} -i ${IMPALA_HOSTNAME} -q "INVALIDATE METADATA"
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sleep 1
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# Time to loop through the views and create them.
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# At this point all table-schemas should have been created.
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previous_num_of_views_to_retry=${#all_create_view_commands}
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previous_num_of_views_to_retry=${#all_create_view_statements}
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if [[ $previous_num_of_views_to_retry -gt 0 ]]; then
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echo -e "\nAll_create_view_commands:\n\n${all_create_view_commands[@]}\n" # DEBUG
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echo -e "\nAll_create_view_statements:\n\n${all_create_view_statements[@]}\n" # DEBUG
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# Make Impala aware of the new tables, so it knows them when creating the views.
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sleep 1
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impala-shell --user ${HADOOP_USER_NAME} -i ${IMPALA_HOSTNAME} -q "INVALIDATE METADATA"
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sleep 1
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else
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echo -e "\nDB '${db}' does not contain views.\n"
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echo -e "\nDB '${db}' does not contain any views.\n"
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fi
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level_counter=0
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while [[ ${#all_create_view_commands[@]} -gt 0 ]]; do
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while [[ ${#all_create_view_statements[@]} -gt 0 ]]; do
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((level_counter++))
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# The only accepted reason for a view to not be created, is if it depends on another view, which has not been created yet.
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# In this case, we should retry creating this particular view again.
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should_retry_create_view_commands=()
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should_retry_create_view_statements=()
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for create_view_command in "${all_create_view_commands[@]}"; do # Here we use double quotes, as the elements are phrases, instead of single-words.
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impala-shell --user ${HADOOP_USER_NAME} -i ${IMPALA_HOSTNAME} -q "${create_view_command}" |& tee error.log # impala-shell prints all logs in stderr, so wee need to capture them and put them in a file, in order to perform "grep" on them later
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for create_view_statement in "${all_create_view_statements[@]}"; do # Here we use double quotes, as the elements are phrases, instead of single-words.
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impala-shell --user ${HADOOP_USER_NAME} -i ${IMPALA_HOSTNAME} -q "${create_view_statement}" |& tee error.log # impala-shell prints all logs in stderr, so wee need to capture them and put them in a file, in order to perform "grep" on them later
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specific_errors=`cat error.log | grep -E "FAILED: ParseException line 1:13 missing TABLE at 'view'|ERROR: AnalysisException: Could not resolve table reference:"`
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if [ -n "$specific_errors" ]; then
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echo -e "\nspecific_errors: ${specific_errors}\n"
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echo -e "\nView '$(cat error.log | grep "CREATE VIEW " | sed 's/CREATE VIEW //g' | sed 's/ as select .*//g')' failed to be created, possibly because it depends on another view.\n"
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should_retry_create_view_commands+=("$create_view_command")
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should_retry_create_view_statements+=("$create_view_statement")
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else
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sleep 1 # Wait a bit for Impala to register that the view was created, before possibly referencing it by another view.
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fi
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done
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new_num_of_views_to_retry=${#should_retry_create_view_commands}
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new_num_of_views_to_retry=${#should_retry_create_view_statements}
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if [[ $new_num_of_views_to_retry -eq $previous_num_of_views_to_retry ]]; then
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echo -e "THE NUMBER OF VIEWS TO RETRY HAS NOT BEEN REDUCED! THE SCRIPT IS LIKELY GOING TO AN INFINITE-LOOP! EXITING.."
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echo -e "\n\nERROR: THE NUMBER OF VIEWS TO RETRY HAS NOT BEEN REDUCED! THE SCRIPT IS LIKELY GOING TO AN INFINITE-LOOP! EXITING..\n\n"
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return 3
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elif [[ $new_num_of_views_to_retry -gt 0 ]]; then
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echo -e "\nTo be retried \"create_view_commands\":\n\n${should_retry_create_view_commands[@]}\n"
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echo -e "\nTo be retried \"create_view_statements\":\n\n${should_retry_create_view_statements[@]}\n"
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previous_num_of_views_to_retry=$new_num_of_views_to_retry
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else
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echo -e "\nFinished creating views db: ${db}, in level-${level_counter}.\n"
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echo -e "\nFinished creating views, for db: '${db}', in level-${level_counter}.\n"
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fi
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all_create_view_commands=("${should_retry_create_view_command[@]}") # This is needed in any case to either move forward with the rest of the views or stop at 0 remaining views.
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all_create_view_statements=("${should_retry_create_view_statement[@]}") # This is needed in any case to either move forward with the rest of the views or stop at 0 remaining views.
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done
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sleep 1
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impala-shell --user ${HADOOP_USER_NAME} -i ${IMPALA_HOSTNAME} -q "INVALIDATE METADATA"
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sleep 1
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echo "Computing stats for tables.."
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echo -e "\nComputing stats for tables..\n"
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entities_on_impala=`impala-shell --user ${HADOOP_USER_NAME} -i ${IMPALA_HOSTNAME} --delimited -q "show tables in ${db}"`
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for i in ${entities_on_impala[@]}; do # Use un-quoted values, as the elemetns are single-words.
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# Taking the create table statement from the Ocean cluster, just to check if its a view, as the output is easier than using impala-shell from Impala cluster.
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create_view_command=`hive -e "show create table ${db}.${i};" | grep "CREATE VIEW"` # This grep works here, as we do not want to match multiple-lines.
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if [ -z "$create_view_command" ]; then # If it's a table, then go load the data to it.
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create_view_statement=`hive -e "show create table ${db}.${i};" | grep "CREATE VIEW"` # This grep works here, as we do not want to match multiple-lines.
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if [ -z "$create_view_statement" ]; then # If it's a table, then go load the data to it.
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impala-shell --user ${HADOOP_USER_NAME} -i ${IMPALA_HOSTNAME} -q "compute stats ${db}.${i}";
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fi
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done
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@ -209,13 +207,12 @@ function copydb() {
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if [ "${entities_on_impala[@]}" == "${entities_on_ocean[@]}" ]; then
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echo -e "\nAll entities have been copied to Impala cluster.\n"
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else
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echo -e "\n\n1 OR MORE ENTITIES OF DB '${db}' FAILED TO BE COPIED TO IMPALA CLUSTER!\n\n"
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echo -e "\n\nERROR: 1 OR MORE ENTITIES OF DB '${db}' FAILED TO BE COPIED TO IMPALA CLUSTER!\n\n"
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rm -f error.log
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return 4
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fi
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rm -f error.log
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echo -e "\n\nFinished processing db: ${db}\n\n"
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}
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@ -10,7 +10,7 @@ export HADOOP_USER_NAME=$2
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# Set the active HDFS node of OCEAN and IMPALA cluster.
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OCEAN_HDFS_NODE='hdfs://nameservice1'
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echo "OCEAN HDFS virtual-name which resolves automatically to the active-node: ${OCEAN_HDFS_NODE}"
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echo -e "\nOCEAN HDFS virtual-name which resolves automatically to the active-node: ${OCEAN_HDFS_NODE}"
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IMPALA_HDFS_NODE=''
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COUNTER=0
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@ -28,10 +28,10 @@ while [ $COUNTER -lt 3 ]; do
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((COUNTER++))
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done
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if [ -z "$IMPALA_HDFS_NODE" ]; then
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echo -e "\n\nPROBLEM WHEN SETTING THE HDFS-NODE FOR IMPALA CLUSTER! | AFTER ${COUNTER} RETRIES.\n\n"
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echo -e "\n\nERROR: PROBLEM WHEN SETTING THE HDFS-NODE FOR IMPALA CLUSTER! | AFTER ${COUNTER} RETRIES.\n\n"
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exit 1
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fi
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echo "Active IMPALA HDFS Node: ${IMPALA_HDFS_NODE} , after ${COUNTER} retries."
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echo -e "Active IMPALA HDFS Node: ${IMPALA_HDFS_NODE} , after ${COUNTER} retries.\n\n"
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IMPALA_HOSTNAME='impala-cluster-dn1.openaire.eu'
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IMPALA_CONFIG_FILE='/etc/impala_cluster/hdfs-site.xml'
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@ -58,12 +58,13 @@ LOCATION_SED_ARG_3='s/\.location[[:space:]]/\.\`location\` /g'
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function copydb() {
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db=$1
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echo -e "\nStart processing db: '${db}'..\n"
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# Delete the old DB from Impala cluster (if exists).
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impala-shell --user ${HADOOP_USER_NAME} -i ${IMPALA_HOSTNAME} -q "drop database if exists ${db} cascade" |& tee error.log # impala-shell prints all logs in stderr, so wee need to capture them and put them in a file, in order to perform "grep" on them later
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log_errors=`cat error.log | grep -E "WARN|ERROR|FAILED"`
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if [ -n "$log_errors" ]; then
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echo -e "\n\nTHERE WAS A PROBLEM WHEN DROPPING THE OLD DATABASE! EXITING...\n\n"
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echo -e "\n\nERROR: THERE WAS A PROBLEM WHEN DROPPING THE OLD DATABASE! EXITING...\n\n"
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rm -f error.log
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return 1
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fi
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@ -72,7 +73,7 @@ function copydb() {
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sleep 1
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impala-shell --user ${HADOOP_USER_NAME} -i ${IMPALA_HOSTNAME} -q "INVALIDATE METADATA"
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echo "Copying $db files from Ocean to Impala cluster.."
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echo -e "\n\nCopying files of '${db}', from Ocean to Impala cluster..\n"
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# Using max-bandwidth of: 50 * 100 Mb/s = 5 Gb/s
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# Using max memory of: 50 * 6144 = 300 Gb
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# Using 1MB as a buffer-size.
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@ -88,9 +89,9 @@ function copydb() {
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# Check the exit status of the "hadoop distcp" command.
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if [ $? -eq 0 ]; then
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echo "Successfully copied the files of '${db}'."
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echo -e "\nSuccessfully copied the files of '${db}'.\n"
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else
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echo "Failed to transfer the files of '${db}', with 'hadoop distcp'. Got with exit status: $?"
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echo -e "\n\nERROR: FAILED TO TRANSFER THE FILES OF '${db}', WITH 'hadoop distcp'. GOT WITH EXIT STATUS: $?\n\n"
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rm -f error.log
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return 2
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fi
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@ -98,7 +99,7 @@ function copydb() {
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# In case we ever use this script for a writable DB (using inserts/updates), we should perform the following costly operation as well..
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#hdfs dfs -conf ${IMPALA_CONFIG_FILE} -chmod -R 777 ${TEMP_SUBDIR_FULLPATH}/${db}.db
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echo "Creating schema for ${db}"
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echo -e "\nCreating schema for db: '${db}'\n"
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# create the new database (with the same name)
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impala-shell --user ${HADOOP_USER_NAME} -i ${IMPALA_HOSTNAME} -q "create database ${db}"
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@ -110,31 +111,31 @@ function copydb() {
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# Because "Hive" and "Impala" do not have compatible schemas, we cannot use the "show create table <name>" output from hive to create the exact same table in impala.
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# So, we have to find at least one parquet file (check if it's there) from the table in the ocean cluster for impala to use it to extract the table-schema itself from that file.
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all_create_view_commands=()
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all_create_view_statements=()
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entities_on_ocean=`hive -e "show tables in ${db};" | sed 's/WARN:.*//g'` # Get the tables and views without any potential the "WARN" logs.
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for i in ${entities_on_ocean[@]}; do # Use un-quoted values, as the elemetns are single-words.
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# Check if this is a view by showing the create-command where it should print "create view" for a view, not the "create table". Unfortunately, there is now "show views" command.
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create_entity_command=`hive -e "show create table ${db}.${i};"` # It needs to happen in two stages, otherwise the "grep" is not able to match multi-line command.
|
||||
# Check if this is a view by showing the create-statement where it should print "create view" for a view, not the "create table". Unfortunately, there is no "show views" command.
|
||||
create_entity_statement=`hive -e "show create table ${db}.${i};"` # It needs to happen in two stages, otherwise the "grep" is not able to match multi-line statement.
|
||||
|
||||
create_view_command_test=`echo -e "$create_entity_command" | grep 'CREATE VIEW'`
|
||||
if [ -n "$create_view_command_test" ]; then
|
||||
echo -e "\n'${i}' is a view, so we will save its 'create view' command and execute it on Impala, after all tables have been created.\n"
|
||||
create_view_command=`echo -e "$create_entity_command" | sed 's/WARN:.*//g' | sed 's/\`//g' \
|
||||
create_view_statement_test=`echo -e "$create_entity_statement" | grep 'CREATE VIEW'`
|
||||
if [ -n "$create_view_statement_test" ]; then
|
||||
echo -e "\n'${i}' is a view, so we will save its 'create view' statement and execute it on Impala, after all tables have been created.\n"
|
||||
create_view_statement=`echo -e "$create_entity_statement" | sed 's/WARN:.*//g' | sed 's/\`//g' \
|
||||
| sed 's/"$/;/' | sed 's/^"//' | sed 's/\\"\\"/\"/g' | sed -e "${LOCATION_HDFS_NODE_SED_ARG}" | sed "${DATE_SED_ARG_1}" | sed "${HASH_SED_ARG_1}" | sed "${LOCATION_SED_ARG_1}" \
|
||||
| sed "${DATE_SED_ARG_2}" | sed "${HASH_SED_ARG_2}" | sed "${LOCATION_SED_ARG_2}" \
|
||||
| sed "${DATE_SED_ARG_3}" | sed "${HASH_SED_ARG_3}" | sed "${LOCATION_SED_ARG_3}"`
|
||||
all_create_view_commands+=("$create_view_command")
|
||||
all_create_view_statements+=("$create_view_statement")
|
||||
else
|
||||
echo -e "\n'${i}' is a table, so we will check for its parquet files and create the table on Impala cluster.\n"
|
||||
CURRENT_PRQ_FILE=`hdfs dfs -conf ${IMPALA_CONFIG_FILE} -ls -C "${IMPALA_HDFS_DB_BASE_PATH}/${db}.db/${i}/" | grep -v 'Found' | grep -v '_impala_insert_staging' | head -1`
|
||||
if [ -z "$CURRENT_PRQ_FILE" ]; then # If there is not parquet-file inside.
|
||||
echo -e "\n\nTHE TABLE \"${i}\" HAD NO PARQUET FILES TO GET THE SCHEMA FROM! IT'S EMPTY!\n\n"
|
||||
echo -e "\nERROR: THE TABLE \"${i}\" HAD NO FILES TO GET THE SCHEMA FROM! IT'S EMPTY!\n\n"
|
||||
else
|
||||
impala-shell --user ${HADOOP_USER_NAME} -i ${IMPALA_HOSTNAME} -q "create table ${db}.${i} like parquet '${CURRENT_PRQ_FILE}' stored as parquet;" |& tee error.log
|
||||
log_errors=`cat error.log | grep -E "WARN|ERROR|FAILED"`
|
||||
if [ -n "$log_errors" ]; then
|
||||
echo -e "\n\nTHERE WAS A PROBLEM WHEN CREATING TABLE '${i}'!\n\n"
|
||||
echo -e "\n\nERROR: THERE WAS A PROBLEM WHEN CREATING TABLE '${i}'!\n\n"
|
||||
fi
|
||||
fi
|
||||
fi
|
||||
|
|
@ -142,65 +143,62 @@ function copydb() {
|
|||
|
||||
echo -e "\nAll tables have been created, going to create the views..\n"
|
||||
|
||||
# Make Impala aware of the new tables.
|
||||
sleep 1
|
||||
impala-shell --user ${HADOOP_USER_NAME} -i ${IMPALA_HOSTNAME} -q "INVALIDATE METADATA"
|
||||
sleep 1
|
||||
|
||||
# Time to loop through the views and create them.
|
||||
# At this point all table-schemas should have been created.
|
||||
|
||||
previous_num_of_views_to_retry=${#all_create_view_commands}
|
||||
previous_num_of_views_to_retry=${#all_create_view_statements}
|
||||
if [[ $previous_num_of_views_to_retry -gt 0 ]]; then
|
||||
echo -e "\nAll_create_view_commands:\n\n${all_create_view_commands[@]}\n" # DEBUG
|
||||
echo -e "\nAll_create_view_statements:\n\n${all_create_view_statements[@]}\n" # DEBUG
|
||||
# Make Impala aware of the new tables, so it knows them when creating the views.
|
||||
sleep 1
|
||||
impala-shell --user ${HADOOP_USER_NAME} -i ${IMPALA_HOSTNAME} -q "INVALIDATE METADATA"
|
||||
sleep 1
|
||||
else
|
||||
echo -e "\nDB '${db}' does not contain views.\n"
|
||||
echo -e "\nDB '${db}' does not contain any views.\n"
|
||||
fi
|
||||
|
||||
level_counter=0
|
||||
while [[ ${#all_create_view_commands[@]} -gt 0 ]]; do
|
||||
while [[ ${#all_create_view_statements[@]} -gt 0 ]]; do
|
||||
((level_counter++))
|
||||
# The only accepted reason for a view to not be created, is if it depends on another view, which has not been created yet.
|
||||
# In this case, we should retry creating this particular view again.
|
||||
should_retry_create_view_commands=()
|
||||
should_retry_create_view_statements=()
|
||||
|
||||
for create_view_command in "${all_create_view_commands[@]}"; do # Here we use double quotes, as the elements are phrases, instead of single-words.
|
||||
impala-shell --user ${HADOOP_USER_NAME} -i ${IMPALA_HOSTNAME} -q "${create_view_command}" |& tee error.log # impala-shell prints all logs in stderr, so wee need to capture them and put them in a file, in order to perform "grep" on them later
|
||||
for create_view_statement in "${all_create_view_statements[@]}"; do # Here we use double quotes, as the elements are phrases, instead of single-words.
|
||||
impala-shell --user ${HADOOP_USER_NAME} -i ${IMPALA_HOSTNAME} -q "${create_view_statement}" |& tee error.log # impala-shell prints all logs in stderr, so wee need to capture them and put them in a file, in order to perform "grep" on them later
|
||||
specific_errors=`cat error.log | grep -E "FAILED: ParseException line 1:13 missing TABLE at 'view'|ERROR: AnalysisException: Could not resolve table reference:"`
|
||||
if [ -n "$specific_errors" ]; then
|
||||
echo -e "\nspecific_errors: ${specific_errors}\n"
|
||||
echo -e "\nView '$(cat error.log | grep "CREATE VIEW " | sed 's/CREATE VIEW //g' | sed 's/ as select .*//g')' failed to be created, possibly because it depends on another view.\n"
|
||||
should_retry_create_view_commands+=("$create_view_command")
|
||||
should_retry_create_view_statements+=("$create_view_statement")
|
||||
else
|
||||
sleep 1 # Wait a bit for Impala to register that the view was created, before possibly referencing it by another view.
|
||||
fi
|
||||
done
|
||||
|
||||
new_num_of_views_to_retry=${#should_retry_create_view_commands}
|
||||
new_num_of_views_to_retry=${#should_retry_create_view_statements}
|
||||
if [[ $new_num_of_views_to_retry -eq $previous_num_of_views_to_retry ]]; then
|
||||
echo -e "THE NUMBER OF VIEWS TO RETRY HAS NOT BEEN REDUCED! THE SCRIPT IS LIKELY GOING TO AN INFINITE-LOOP! EXITING.."
|
||||
echo -e "\n\nERROR: THE NUMBER OF VIEWS TO RETRY HAS NOT BEEN REDUCED! THE SCRIPT IS LIKELY GOING TO AN INFINITE-LOOP! EXITING..\n\n"
|
||||
return 3
|
||||
elif [[ $new_num_of_views_to_retry -gt 0 ]]; then
|
||||
echo -e "\nTo be retried \"create_view_commands\":\n\n${should_retry_create_view_commands[@]}\n"
|
||||
echo -e "\nTo be retried \"create_view_statements\":\n\n${should_retry_create_view_statements[@]}\n"
|
||||
previous_num_of_views_to_retry=$new_num_of_views_to_retry
|
||||
else
|
||||
echo -e "\nFinished creating views db: ${db}, in level-${level_counter}.\n"
|
||||
echo -e "\nFinished creating views, for db: '${db}', in level-${level_counter}.\n"
|
||||
fi
|
||||
all_create_view_commands=("${should_retry_create_view_command[@]}") # This is needed in any case to either move forward with the rest of the views or stop at 0 remaining views.
|
||||
all_create_view_statements=("${should_retry_create_view_statement[@]}") # This is needed in any case to either move forward with the rest of the views or stop at 0 remaining views.
|
||||
done
|
||||
|
||||
sleep 1
|
||||
impala-shell --user ${HADOOP_USER_NAME} -i ${IMPALA_HOSTNAME} -q "INVALIDATE METADATA"
|
||||
sleep 1
|
||||
|
||||
echo "Computing stats for tables.."
|
||||
|
||||
echo -e "\nComputing stats for tables..\n"
|
||||
entities_on_impala=`impala-shell --user ${HADOOP_USER_NAME} -i ${IMPALA_HOSTNAME} --delimited -q "show tables in ${db}"`
|
||||
|
||||
for i in ${entities_on_impala[@]}; do # Use un-quoted values, as the elemetns are single-words.
|
||||
# Taking the create table statement from the Ocean cluster, just to check if its a view, as the output is easier than using impala-shell from Impala cluster.
|
||||
create_view_command=`hive -e "show create table ${db}.${i};" | grep "CREATE VIEW"` # This grep works here, as we do not want to match multiple-lines.
|
||||
if [ -z "$create_view_command" ]; then # If it's a table, then go load the data to it.
|
||||
create_view_statement=`hive -e "show create table ${db}.${i};" | grep "CREATE VIEW"` # This grep works here, as we do not want to match multiple-lines.
|
||||
if [ -z "$create_view_statement" ]; then # If it's a table, then go load the data to it.
|
||||
impala-shell --user ${HADOOP_USER_NAME} -i ${IMPALA_HOSTNAME} -q "compute stats ${db}.${i}";
|
||||
fi
|
||||
done
|
||||
|
|
@ -208,13 +206,12 @@ function copydb() {
|
|||
if [ "${entities_on_impala[@]}" == "${entities_on_ocean[@]}" ]; then
|
||||
echo -e "\nAll entities have been copied to Impala cluster.\n"
|
||||
else
|
||||
echo -e "\n\n1 OR MORE ENTITIES OF DB '${db}' FAILED TO BE COPIED TO IMPALA CLUSTER!\n\n"
|
||||
echo -e "\n\nERROR: 1 OR MORE ENTITIES OF DB '${db}' FAILED TO BE COPIED TO IMPALA CLUSTER!\n\n"
|
||||
rm -f error.log
|
||||
return 4
|
||||
fi
|
||||
|
||||
rm -f error.log
|
||||
|
||||
echo -e "\n\nFinished processing db: ${db}\n\n"
|
||||
}
|
||||
|
||||
|
|
|
|||
|
|
@ -10,7 +10,7 @@ export HADOOP_USER_NAME=$2
|
|||
|
||||
# Set the active HDFS node of OCEAN and IMPALA cluster.
|
||||
OCEAN_HDFS_NODE='hdfs://nameservice1'
|
||||
echo "OCEAN HDFS virtual-name which resolves automatically to the active-node: ${OCEAN_HDFS_NODE}"
|
||||
echo -e "\nOCEAN HDFS virtual-name which resolves automatically to the active-node: ${OCEAN_HDFS_NODE}"
|
||||
|
||||
IMPALA_HDFS_NODE=''
|
||||
COUNTER=0
|
||||
|
|
@ -28,10 +28,10 @@ while [ $COUNTER -lt 3 ]; do
|
|||
((COUNTER++))
|
||||
done
|
||||
if [ -z "$IMPALA_HDFS_NODE" ]; then
|
||||
echo -e "\n\nPROBLEM WHEN SETTING THE HDFS-NODE FOR IMPALA CLUSTER! | AFTER ${COUNTER} RETRIES.\n\n"
|
||||
echo -e "\n\nERROR: PROBLEM WHEN SETTING THE HDFS-NODE FOR IMPALA CLUSTER! | AFTER ${COUNTER} RETRIES.\n\n"
|
||||
exit 1
|
||||
fi
|
||||
echo "Active IMPALA HDFS Node: ${IMPALA_HDFS_NODE} , after ${COUNTER} retries."
|
||||
echo -e "Active IMPALA HDFS Node: ${IMPALA_HDFS_NODE} , after ${COUNTER} retries.\n\n"
|
||||
|
||||
IMPALA_HOSTNAME='impala-cluster-dn1.openaire.eu'
|
||||
IMPALA_CONFIG_FILE='/etc/impala_cluster/hdfs-site.xml'
|
||||
|
|
@ -58,12 +58,13 @@ LOCATION_SED_ARG_3='s/\.location[[:space:]]/\.\`location\` /g'
|
|||
|
||||
function copydb() {
|
||||
db=$1
|
||||
echo -e "\nStart processing db: '${db}'..\n"
|
||||
|
||||
# Delete the old DB from Impala cluster (if exists).
|
||||
impala-shell --user ${HADOOP_USER_NAME} -i ${IMPALA_HOSTNAME} -q "drop database if exists ${db} cascade" |& tee error.log # impala-shell prints all logs in stderr, so wee need to capture them and put them in a file, in order to perform "grep" on them later
|
||||
log_errors=`cat error.log | grep -E "WARN|ERROR|FAILED"`
|
||||
if [ -n "$log_errors" ]; then
|
||||
echo -e "\n\nTHERE WAS A PROBLEM WHEN DROPPING THE OLD DATABASE! EXITING...\n\n"
|
||||
echo -e "\n\nERROR: THERE WAS A PROBLEM WHEN DROPPING THE OLD DATABASE! EXITING...\n\n"
|
||||
rm -f error.log
|
||||
return 1
|
||||
fi
|
||||
|
|
@ -72,7 +73,7 @@ function copydb() {
|
|||
sleep 1
|
||||
impala-shell --user ${HADOOP_USER_NAME} -i ${IMPALA_HOSTNAME} -q "INVALIDATE METADATA"
|
||||
|
||||
echo "Copying $db files from Ocean to Impala cluster.."
|
||||
echo -e "\n\nCopying files of '${db}', from Ocean to Impala cluster..\n"
|
||||
# Using max-bandwidth of: 50 * 100 Mb/s = 5 Gb/s
|
||||
# Using max memory of: 50 * 6144 = 300 Gb
|
||||
# Using 1MB as a buffer-size.
|
||||
|
|
@ -88,9 +89,9 @@ function copydb() {
|
|||
|
||||
# Check the exit status of the "hadoop distcp" command.
|
||||
if [ $? -eq 0 ]; then
|
||||
echo "Successfully copied the files of '${db}'."
|
||||
echo -e "\nSuccessfully copied the files of '${db}'.\n"
|
||||
else
|
||||
echo "Failed to transfer the files of '${db}', with 'hadoop distcp'. Got with exit status: $?"
|
||||
echo -e "\n\nERROR: FAILED TO TRANSFER THE FILES OF '${db}', WITH 'hadoop distcp'. GOT WITH EXIT STATUS: $?\n\n"
|
||||
rm -f error.log
|
||||
return 2
|
||||
fi
|
||||
|
|
@ -98,7 +99,7 @@ function copydb() {
|
|||
# In case we ever use this script for a writable DB (using inserts/updates), we should perform the following costly operation as well..
|
||||
#hdfs dfs -conf ${IMPALA_CONFIG_FILE} -chmod -R 777 ${TEMP_SUBDIR_FULLPATH}/${db}.db
|
||||
|
||||
echo "Creating schema for ${db}"
|
||||
echo -e "\nCreating schema for db: '${db}'\n"
|
||||
|
||||
# create the new database (with the same name)
|
||||
impala-shell --user ${HADOOP_USER_NAME} -i ${IMPALA_HOSTNAME} -q "create database ${db}"
|
||||
|
|
@ -110,31 +111,31 @@ function copydb() {
|
|||
# Because "Hive" and "Impala" do not have compatible schemas, we cannot use the "show create table <name>" output from hive to create the exact same table in impala.
|
||||
# So, we have to find at least one parquet file (check if it's there) from the table in the ocean cluster for impala to use it to extract the table-schema itself from that file.
|
||||
|
||||
all_create_view_commands=()
|
||||
all_create_view_statements=()
|
||||
|
||||
entities_on_ocean=`hive -e "show tables in ${db};" | sed 's/WARN:.*//g'` # Get the tables and views without any potential the "WARN" logs.
|
||||
for i in ${entities_on_ocean[@]}; do # Use un-quoted values, as the elemetns are single-words.
|
||||
# Check if this is a view by showing the create-command where it should print "create view" for a view, not the "create table". Unfortunately, there is now "show views" command.
|
||||
create_entity_command=`hive -e "show create table ${db}.${i};"` # It needs to happen in two stages, otherwise the "grep" is not able to match multi-line command.
|
||||
# Check if this is a view by showing the create-statement where it should print "create view" for a view, not the "create table". Unfortunately, there is no "show views" command.
|
||||
create_entity_statement=`hive -e "show create table ${db}.${i};"` # It needs to happen in two stages, otherwise the "grep" is not able to match multi-line statement.
|
||||
|
||||
create_view_command_test=`echo -e "$create_entity_command" | grep 'CREATE VIEW'`
|
||||
if [ -n "$create_view_command_test" ]; then
|
||||
echo -e "\n'${i}' is a view, so we will save its 'create view' command and execute it on Impala, after all tables have been created.\n"
|
||||
create_view_command=`echo -e "$create_entity_command" | sed 's/WARN:.*//g' | sed 's/\`//g' \
|
||||
create_view_statement_test=`echo -e "$create_entity_statement" | grep 'CREATE VIEW'`
|
||||
if [ -n "$create_view_statement_test" ]; then
|
||||
echo -e "\n'${i}' is a view, so we will save its 'create view' statement and execute it on Impala, after all tables have been created.\n"
|
||||
create_view_statement=`echo -e "$create_entity_statement" | sed 's/WARN:.*//g' | sed 's/\`//g' \
|
||||
| sed 's/"$/;/' | sed 's/^"//' | sed 's/\\"\\"/\"/g' | sed -e "${LOCATION_HDFS_NODE_SED_ARG}" | sed "${DATE_SED_ARG_1}" | sed "${HASH_SED_ARG_1}" | sed "${LOCATION_SED_ARG_1}" \
|
||||
| sed "${DATE_SED_ARG_2}" | sed "${HASH_SED_ARG_2}" | sed "${LOCATION_SED_ARG_2}" \
|
||||
| sed "${DATE_SED_ARG_3}" | sed "${HASH_SED_ARG_3}" | sed "${LOCATION_SED_ARG_3}"`
|
||||
all_create_view_commands+=("$create_view_command")
|
||||
all_create_view_statements+=("$create_view_statement")
|
||||
else
|
||||
echo -e "\n'${i}' is a table, so we will check for its parquet files and create the table on Impala cluster.\n"
|
||||
CURRENT_PRQ_FILE=`hdfs dfs -conf ${IMPALA_CONFIG_FILE} -ls -C "${IMPALA_HDFS_DB_BASE_PATH}/${db}.db/${i}/" | grep -v 'Found' | grep -v '_impala_insert_staging' | head -1`
|
||||
if [ -z "$CURRENT_PRQ_FILE" ]; then # If there is not parquet-file inside.
|
||||
echo -e "\n\nTHE TABLE \"${i}\" HAD NO PARQUET FILES TO GET THE SCHEMA FROM! IT'S EMPTY!\n\n"
|
||||
echo -e "\nERROR: THE TABLE \"${i}\" HAD NO FILES TO GET THE SCHEMA FROM! IT'S EMPTY!\n\n"
|
||||
else
|
||||
impala-shell --user ${HADOOP_USER_NAME} -i ${IMPALA_HOSTNAME} -q "create table ${db}.${i} like parquet '${CURRENT_PRQ_FILE}' stored as parquet;" |& tee error.log
|
||||
log_errors=`cat error.log | grep -E "WARN|ERROR|FAILED"`
|
||||
if [ -n "$log_errors" ]; then
|
||||
echo -e "\n\nTHERE WAS A PROBLEM WHEN CREATING TABLE '${i}'!\n\n"
|
||||
echo -e "\n\nERROR: THERE WAS A PROBLEM WHEN CREATING TABLE '${i}'!\n\n"
|
||||
fi
|
||||
fi
|
||||
fi
|
||||
|
|
@ -142,65 +143,62 @@ function copydb() {
|
|||
|
||||
echo -e "\nAll tables have been created, going to create the views..\n"
|
||||
|
||||
# Make Impala aware of the new tables.
|
||||
sleep 1
|
||||
impala-shell --user ${HADOOP_USER_NAME} -i ${IMPALA_HOSTNAME} -q "INVALIDATE METADATA"
|
||||
sleep 1
|
||||
|
||||
# Time to loop through the views and create them.
|
||||
# At this point all table-schemas should have been created.
|
||||
|
||||
previous_num_of_views_to_retry=${#all_create_view_commands}
|
||||
previous_num_of_views_to_retry=${#all_create_view_statements}
|
||||
if [[ $previous_num_of_views_to_retry -gt 0 ]]; then
|
||||
echo -e "\nAll_create_view_commands:\n\n${all_create_view_commands[@]}\n" # DEBUG
|
||||
echo -e "\nAll_create_view_statements:\n\n${all_create_view_statements[@]}\n" # DEBUG
|
||||
# Make Impala aware of the new tables, so it knows them when creating the views.
|
||||
sleep 1
|
||||
impala-shell --user ${HADOOP_USER_NAME} -i ${IMPALA_HOSTNAME} -q "INVALIDATE METADATA"
|
||||
sleep 1
|
||||
else
|
||||
echo -e "\nDB '${db}' does not contain views.\n"
|
||||
echo -e "\nDB '${db}' does not contain any views.\n"
|
||||
fi
|
||||
|
||||
level_counter=0
|
||||
while [[ ${#all_create_view_commands[@]} -gt 0 ]]; do
|
||||
while [[ ${#all_create_view_statements[@]} -gt 0 ]]; do
|
||||
((level_counter++))
|
||||
# The only accepted reason for a view to not be created, is if it depends on another view, which has not been created yet.
|
||||
# In this case, we should retry creating this particular view again.
|
||||
should_retry_create_view_commands=()
|
||||
should_retry_create_view_statements=()
|
||||
|
||||
for create_view_command in "${all_create_view_commands[@]}"; do # Here we use double quotes, as the elements are phrases, instead of single-words.
|
||||
impala-shell --user ${HADOOP_USER_NAME} -i ${IMPALA_HOSTNAME} -q "${create_view_command}" |& tee error.log # impala-shell prints all logs in stderr, so wee need to capture them and put them in a file, in order to perform "grep" on them later
|
||||
for create_view_statement in "${all_create_view_statements[@]}"; do # Here we use double quotes, as the elements are phrases, instead of single-words.
|
||||
impala-shell --user ${HADOOP_USER_NAME} -i ${IMPALA_HOSTNAME} -q "${create_view_statement}" |& tee error.log # impala-shell prints all logs in stderr, so wee need to capture them and put them in a file, in order to perform "grep" on them later
|
||||
specific_errors=`cat error.log | grep -E "FAILED: ParseException line 1:13 missing TABLE at 'view'|ERROR: AnalysisException: Could not resolve table reference:"`
|
||||
if [ -n "$specific_errors" ]; then
|
||||
echo -e "\nspecific_errors: ${specific_errors}\n"
|
||||
echo -e "\nView '$(cat error.log | grep "CREATE VIEW " | sed 's/CREATE VIEW //g' | sed 's/ as select .*//g')' failed to be created, possibly because it depends on another view.\n"
|
||||
should_retry_create_view_commands+=("$create_view_command")
|
||||
should_retry_create_view_statements+=("$create_view_statement")
|
||||
else
|
||||
sleep 1 # Wait a bit for Impala to register that the view was created, before possibly referencing it by another view.
|
||||
fi
|
||||
done
|
||||
|
||||
new_num_of_views_to_retry=${#should_retry_create_view_commands}
|
||||
new_num_of_views_to_retry=${#should_retry_create_view_statements}
|
||||
if [[ $new_num_of_views_to_retry -eq $previous_num_of_views_to_retry ]]; then
|
||||
echo -e "THE NUMBER OF VIEWS TO RETRY HAS NOT BEEN REDUCED! THE SCRIPT IS LIKELY GOING TO AN INFINITE-LOOP! EXITING.."
|
||||
echo -e "\n\nERROR: THE NUMBER OF VIEWS TO RETRY HAS NOT BEEN REDUCED! THE SCRIPT IS LIKELY GOING TO AN INFINITE-LOOP! EXITING..\n\n"
|
||||
return 3
|
||||
elif [[ $new_num_of_views_to_retry -gt 0 ]]; then
|
||||
echo -e "\nTo be retried \"create_view_commands\":\n\n${should_retry_create_view_commands[@]}\n"
|
||||
echo -e "\nTo be retried \"create_view_statements\":\n\n${should_retry_create_view_statements[@]}\n"
|
||||
previous_num_of_views_to_retry=$new_num_of_views_to_retry
|
||||
else
|
||||
echo -e "\nFinished creating views db: ${db}, in level-${level_counter}.\n"
|
||||
echo -e "\nFinished creating views, for db: '${db}', in level-${level_counter}.\n"
|
||||
fi
|
||||
all_create_view_commands=("${should_retry_create_view_command[@]}") # This is needed in any case to either move forward with the rest of the views or stop at 0 remaining views.
|
||||
all_create_view_statements=("${should_retry_create_view_statement[@]}") # This is needed in any case to either move forward with the rest of the views or stop at 0 remaining views.
|
||||
done
|
||||
|
||||
sleep 1
|
||||
impala-shell --user ${HADOOP_USER_NAME} -i ${IMPALA_HOSTNAME} -q "INVALIDATE METADATA"
|
||||
sleep 1
|
||||
|
||||
echo "Computing stats for tables.."
|
||||
|
||||
echo -e "\nComputing stats for tables..\n"
|
||||
entities_on_impala=`impala-shell --user ${HADOOP_USER_NAME} -i ${IMPALA_HOSTNAME} --delimited -q "show tables in ${db}"`
|
||||
|
||||
for i in ${entities_on_impala[@]}; do # Use un-quoted values, as the elemetns are single-words.
|
||||
# Taking the create table statement from the Ocean cluster, just to check if its a view, as the output is easier than using impala-shell from Impala cluster.
|
||||
create_view_command=`hive -e "show create table ${db}.${i};" | grep "CREATE VIEW"` # This grep works here, as we do not want to match multiple-lines.
|
||||
if [ -z "$create_view_command" ]; then # If it's a table, then go load the data to it.
|
||||
create_view_statement=`hive -e "show create table ${db}.${i};" | grep "CREATE VIEW"` # This grep works here, as we do not want to match multiple-lines.
|
||||
if [ -z "$create_view_statement" ]; then # If it's a table, then go load the data to it.
|
||||
impala-shell --user ${HADOOP_USER_NAME} -i ${IMPALA_HOSTNAME} -q "compute stats ${db}.${i}";
|
||||
fi
|
||||
done
|
||||
|
|
@ -208,13 +206,12 @@ function copydb() {
|
|||
if [ "${entities_on_impala[@]}" == "${entities_on_ocean[@]}" ]; then
|
||||
echo -e "\nAll entities have been copied to Impala cluster.\n"
|
||||
else
|
||||
echo -e "\n\n1 OR MORE ENTITIES OF DB '${db}' FAILED TO BE COPIED TO IMPALA CLUSTER!\n\n"
|
||||
echo -e "\n\nERROR: 1 OR MORE ENTITIES OF DB '${db}' FAILED TO BE COPIED TO IMPALA CLUSTER!\n\n"
|
||||
rm -f error.log
|
||||
return 4
|
||||
fi
|
||||
|
||||
rm -f error.log
|
||||
|
||||
echo -e "\n\nFinished processing db: ${db}\n\n"
|
||||
}
|
||||
|
||||
|
|
|
|||
|
|
@ -9,7 +9,7 @@ fi
|
|||
|
||||
# Set the active HDFS node of OCEAN and IMPALA cluster.
|
||||
OCEAN_HDFS_NODE='hdfs://nameservice1'
|
||||
echo "OCEAN HDFS virtual-name which resolves automatically to the active-node: ${OCEAN_HDFS_NODE}"
|
||||
echo -e "\nOCEAN HDFS virtual-name which resolves automatically to the active-node: ${OCEAN_HDFS_NODE}"
|
||||
|
||||
IMPALA_HDFS_NODE=''
|
||||
COUNTER=0
|
||||
|
|
@ -27,10 +27,10 @@ while [ $COUNTER -lt 3 ]; do
|
|||
((COUNTER++))
|
||||
done
|
||||
if [ -z "$IMPALA_HDFS_NODE" ]; then
|
||||
echo -e "\n\nPROBLEM WHEN SETTING THE HDFS-NODE FOR IMPALA CLUSTER! | AFTER ${COUNTER} RETRIES.\n\n"
|
||||
echo -e "\n\nERROR: PROBLEM WHEN SETTING THE HDFS-NODE FOR IMPALA CLUSTER! | AFTER ${COUNTER} RETRIES.\n\n"
|
||||
exit 1
|
||||
fi
|
||||
echo "Active IMPALA HDFS Node: ${IMPALA_HDFS_NODE} , after ${COUNTER} retries."
|
||||
echo -e "Active IMPALA HDFS Node: ${IMPALA_HDFS_NODE} , after ${COUNTER} retries.\n\n"
|
||||
|
||||
IMPALA_HOSTNAME='impala-cluster-dn1.openaire.eu'
|
||||
IMPALA_CONFIG_FILE='/etc/impala_cluster/hdfs-site.xml'
|
||||
|
|
@ -60,12 +60,13 @@ export PROD_USAGE_STATS_DB="openaire_prod_usage_stats"
|
|||
|
||||
function copydb() {
|
||||
db=$1
|
||||
echo -e "\nStart processing db: '${db}'..\n"
|
||||
|
||||
# Delete the old DB from Impala cluster (if exists).
|
||||
impala-shell --user ${HADOOP_USER_NAME} -i ${IMPALA_HOSTNAME} -q "drop database if exists ${db} cascade" |& tee error.log # impala-shell prints all logs in stderr, so wee need to capture them and put them in a file, in order to perform "grep" on them later
|
||||
log_errors=`cat error.log | grep -E "WARN|ERROR|FAILED"`
|
||||
if [ -n "$log_errors" ]; then
|
||||
echo -e "\n\nTHERE WAS A PROBLEM WHEN DROPPING THE OLD DATABASE! EXITING...\n\n"
|
||||
echo -e "\n\nERROR: THERE WAS A PROBLEM WHEN DROPPING THE OLD DATABASE! EXITING...\n\n"
|
||||
rm -f error.log
|
||||
return 1
|
||||
fi
|
||||
|
|
@ -74,7 +75,7 @@ function copydb() {
|
|||
sleep 1
|
||||
impala-shell --user ${HADOOP_USER_NAME} -i ${IMPALA_HOSTNAME} -q "INVALIDATE METADATA"
|
||||
|
||||
echo "Copying $db files from Ocean to Impala cluster.."
|
||||
echo -e "\n\nCopying files of '${db}', from Ocean to Impala cluster..\n"
|
||||
# Using max-bandwidth of: 50 * 100 Mb/s = 5 Gb/s
|
||||
# Using max memory of: 50 * 6144 = 300 Gb
|
||||
# Using 1MB as a buffer-size.
|
||||
|
|
@ -90,9 +91,9 @@ function copydb() {
|
|||
|
||||
# Check the exit status of the "hadoop distcp" command.
|
||||
if [ $? -eq 0 ]; then
|
||||
echo "Successfully copied the files of '${db}'."
|
||||
echo -e "\nSuccessfully copied the files of '${db}'.\n"
|
||||
else
|
||||
echo "Failed to transfer the files of '${db}', with 'hadoop distcp'. Got with exit status: $?"
|
||||
echo -e "\n\nERROR: FAILED TO TRANSFER THE FILES OF '${db}', WITH 'hadoop distcp'. GOT WITH EXIT STATUS: $?\n\n"
|
||||
rm -f error.log
|
||||
return 2
|
||||
fi
|
||||
|
|
@ -100,7 +101,7 @@ function copydb() {
|
|||
# In case we ever use this script for a writable DB (using inserts/updates), we should perform the following costly operation as well..
|
||||
#hdfs dfs -conf ${IMPALA_CONFIG_FILE} -chmod -R 777 ${TEMP_SUBDIR_FULLPATH}/${db}.db
|
||||
|
||||
echo "Creating schema for ${db}"
|
||||
echo -e "\nCreating schema for db: '${db}'\n"
|
||||
|
||||
# create the new database (with the same name)
|
||||
impala-shell --user ${HADOOP_USER_NAME} -i ${IMPALA_HOSTNAME} -q "create database ${db}"
|
||||
|
|
@ -112,31 +113,31 @@ function copydb() {
|
|||
# Because "Hive" and "Impala" do not have compatible schemas, we cannot use the "show create table <name>" output from hive to create the exact same table in impala.
|
||||
# So, we have to find at least one parquet file (check if it's there) from the table in the ocean cluster for impala to use it to extract the table-schema itself from that file.
|
||||
|
||||
all_create_view_commands=()
|
||||
all_create_view_statements=()
|
||||
|
||||
entities_on_ocean=`hive -e "show tables in ${db};" | sed 's/WARN:.*//g'` # Get the tables and views without any potential the "WARN" logs.
|
||||
for i in ${entities_on_ocean[@]}; do # Use un-quoted values, as the elemetns are single-words.
|
||||
# Check if this is a view by showing the create-command where it should print "create view" for a view, not the "create table". Unfortunately, there is now "show views" command.
|
||||
create_entity_command=`hive -e "show create table ${db}.${i};"` # It needs to happen in two stages, otherwise the "grep" is not able to match multi-line command.
|
||||
# Check if this is a view by showing the create-statement where it should print "create view" for a view, not the "create table". Unfortunately, there is no "show views" command.
|
||||
create_entity_statement=`hive -e "show create table ${db}.${i};"` # It needs to happen in two stages, otherwise the "grep" is not able to match multi-line statement.
|
||||
|
||||
create_view_command_test=`echo -e "$create_entity_command" | grep 'CREATE VIEW'`
|
||||
if [ -n "$create_view_command_test" ]; then
|
||||
echo -e "\n'${i}' is a view, so we will save its 'create view' command and execute it on Impala, after all tables have been created.\n"
|
||||
create_view_command=`echo -e "$create_entity_command" | sed 's/WARN:.*//g' | sed 's/\`//g' \
|
||||
create_view_statement_test=`echo -e "$create_entity_statement" | grep 'CREATE VIEW'`
|
||||
if [ -n "$create_view_statement_test" ]; then
|
||||
echo -e "\n'${i}' is a view, so we will save its 'create view' statement and execute it on Impala, after all tables have been created.\n"
|
||||
create_view_statement=`echo -e "$create_entity_statement" | sed 's/WARN:.*//g' | sed 's/\`//g' \
|
||||
| sed 's/"$/;/' | sed 's/^"//' | sed 's/\\"\\"/\"/g' | sed -e "${LOCATION_HDFS_NODE_SED_ARG}" | sed "${DATE_SED_ARG_1}" | sed "${HASH_SED_ARG_1}" | sed "${LOCATION_SED_ARG_1}" \
|
||||
| sed "${DATE_SED_ARG_2}" | sed "${HASH_SED_ARG_2}" | sed "${LOCATION_SED_ARG_2}" \
|
||||
| sed "${DATE_SED_ARG_3}" | sed "${HASH_SED_ARG_3}" | sed "${LOCATION_SED_ARG_3}"`
|
||||
all_create_view_commands+=("$create_view_command")
|
||||
all_create_view_statements+=("$create_view_statement")
|
||||
else
|
||||
echo -e "\n'${i}' is a table, so we will check for its parquet files and create the table on Impala cluster.\n"
|
||||
CURRENT_PRQ_FILE=`hdfs dfs -conf ${IMPALA_CONFIG_FILE} -ls -C "${IMPALA_HDFS_DB_BASE_PATH}/${db}.db/${i}/" | grep -v 'Found' | grep -v '_impala_insert_staging' | head -1`
|
||||
if [ -z "$CURRENT_PRQ_FILE" ]; then # If there is not parquet-file inside.
|
||||
echo -e "\n\nTHE TABLE \"${i}\" HAD NO PARQUET FILES TO GET THE SCHEMA FROM! IT'S EMPTY!\n\n"
|
||||
echo -e "\nERROR: THE TABLE \"${i}\" HAD NO FILES TO GET THE SCHEMA FROM! IT'S EMPTY!\n\n"
|
||||
else
|
||||
impala-shell --user ${HADOOP_USER_NAME} -i ${IMPALA_HOSTNAME} -q "create table ${db}.${i} like parquet '${CURRENT_PRQ_FILE}' stored as parquet;" |& tee error.log
|
||||
log_errors=`cat error.log | grep -E "WARN|ERROR|FAILED"`
|
||||
if [ -n "$log_errors" ]; then
|
||||
echo -e "\n\nTHERE WAS A PROBLEM WHEN CREATING TABLE '${i}'!\n\n"
|
||||
echo -e "\n\nERROR: THERE WAS A PROBLEM WHEN CREATING TABLE '${i}'!\n\n"
|
||||
fi
|
||||
fi
|
||||
fi
|
||||
|
|
@ -144,65 +145,62 @@ function copydb() {
|
|||
|
||||
echo -e "\nAll tables have been created, going to create the views..\n"
|
||||
|
||||
# Make Impala aware of the new tables.
|
||||
sleep 1
|
||||
impala-shell --user ${HADOOP_USER_NAME} -i ${IMPALA_HOSTNAME} -q "INVALIDATE METADATA"
|
||||
sleep 1
|
||||
|
||||
# Time to loop through the views and create them.
|
||||
# At this point all table-schemas should have been created.
|
||||
|
||||
previous_num_of_views_to_retry=${#all_create_view_commands}
|
||||
previous_num_of_views_to_retry=${#all_create_view_statements}
|
||||
if [[ $previous_num_of_views_to_retry -gt 0 ]]; then
|
||||
echo -e "\nAll_create_view_commands:\n\n${all_create_view_commands[@]}\n" # DEBUG
|
||||
echo -e "\nAll_create_view_statements:\n\n${all_create_view_statements[@]}\n" # DEBUG
|
||||
# Make Impala aware of the new tables, so it knows them when creating the views.
|
||||
sleep 1
|
||||
impala-shell --user ${HADOOP_USER_NAME} -i ${IMPALA_HOSTNAME} -q "INVALIDATE METADATA"
|
||||
sleep 1
|
||||
else
|
||||
echo -e "\nDB '${db}' does not contain views.\n"
|
||||
echo -e "\nDB '${db}' does not contain any views.\n"
|
||||
fi
|
||||
|
||||
level_counter=0
|
||||
while [[ ${#all_create_view_commands[@]} -gt 0 ]]; do
|
||||
while [[ ${#all_create_view_statements[@]} -gt 0 ]]; do
|
||||
((level_counter++))
|
||||
# The only accepted reason for a view to not be created, is if it depends on another view, which has not been created yet.
|
||||
# In this case, we should retry creating this particular view again.
|
||||
should_retry_create_view_commands=()
|
||||
should_retry_create_view_statements=()
|
||||
|
||||
for create_view_command in "${all_create_view_commands[@]}"; do # Here we use double quotes, as the elements are phrases, instead of single-words.
|
||||
impala-shell --user ${HADOOP_USER_NAME} -i ${IMPALA_HOSTNAME} -q "${create_view_command}" |& tee error.log # impala-shell prints all logs in stderr, so wee need to capture them and put them in a file, in order to perform "grep" on them later
|
||||
for create_view_statement in "${all_create_view_statements[@]}"; do # Here we use double quotes, as the elements are phrases, instead of single-words.
|
||||
impala-shell --user ${HADOOP_USER_NAME} -i ${IMPALA_HOSTNAME} -q "${create_view_statement}" |& tee error.log # impala-shell prints all logs in stderr, so wee need to capture them and put them in a file, in order to perform "grep" on them later
|
||||
specific_errors=`cat error.log | grep -E "FAILED: ParseException line 1:13 missing TABLE at 'view'|ERROR: AnalysisException: Could not resolve table reference:"`
|
||||
if [ -n "$specific_errors" ]; then
|
||||
echo -e "\nspecific_errors: ${specific_errors}\n"
|
||||
echo -e "\nView '$(cat error.log | grep "CREATE VIEW " | sed 's/CREATE VIEW //g' | sed 's/ as select .*//g')' failed to be created, possibly because it depends on another view.\n"
|
||||
should_retry_create_view_commands+=("$create_view_command")
|
||||
should_retry_create_view_statements+=("$create_view_statement")
|
||||
else
|
||||
sleep 1 # Wait a bit for Impala to register that the view was created, before possibly referencing it by another view.
|
||||
fi
|
||||
done
|
||||
|
||||
new_num_of_views_to_retry=${#should_retry_create_view_commands}
|
||||
new_num_of_views_to_retry=${#should_retry_create_view_statements}
|
||||
if [[ $new_num_of_views_to_retry -eq $previous_num_of_views_to_retry ]]; then
|
||||
echo -e "THE NUMBER OF VIEWS TO RETRY HAS NOT BEEN REDUCED! THE SCRIPT IS LIKELY GOING TO AN INFINITE-LOOP! EXITING.."
|
||||
echo -e "\n\nERROR: THE NUMBER OF VIEWS TO RETRY HAS NOT BEEN REDUCED! THE SCRIPT IS LIKELY GOING TO AN INFINITE-LOOP! EXITING..\n\n"
|
||||
return 3
|
||||
elif [[ $new_num_of_views_to_retry -gt 0 ]]; then
|
||||
echo -e "\nTo be retried \"create_view_commands\":\n\n${should_retry_create_view_commands[@]}\n"
|
||||
echo -e "\nTo be retried \"create_view_statements\":\n\n${should_retry_create_view_statements[@]}\n"
|
||||
previous_num_of_views_to_retry=$new_num_of_views_to_retry
|
||||
else
|
||||
echo -e "\nFinished creating views db: ${db}, in level-${level_counter}.\n"
|
||||
echo -e "\nFinished creating views, for db: '${db}', in level-${level_counter}.\n"
|
||||
fi
|
||||
all_create_view_commands=("${should_retry_create_view_command[@]}") # This is needed in any case to either move forward with the rest of the views or stop at 0 remaining views.
|
||||
all_create_view_statements=("${should_retry_create_view_statement[@]}") # This is needed in any case to either move forward with the rest of the views or stop at 0 remaining views.
|
||||
done
|
||||
|
||||
sleep 1
|
||||
impala-shell --user ${HADOOP_USER_NAME} -i ${IMPALA_HOSTNAME} -q "INVALIDATE METADATA"
|
||||
sleep 1
|
||||
|
||||
echo "Computing stats for tables.."
|
||||
|
||||
echo -e "\nComputing stats for tables..\n"
|
||||
entities_on_impala=`impala-shell --user ${HADOOP_USER_NAME} -i ${IMPALA_HOSTNAME} --delimited -q "show tables in ${db}"`
|
||||
|
||||
for i in ${entities_on_impala[@]}; do # Use un-quoted values, as the elemetns are single-words.
|
||||
# Taking the create table statement from the Ocean cluster, just to check if its a view, as the output is easier than using impala-shell from Impala cluster.
|
||||
create_view_command=`hive -e "show create table ${db}.${i};" | grep "CREATE VIEW"` # This grep works here, as we do not want to match multiple-lines.
|
||||
if [ -z "$create_view_command" ]; then # If it's a table, then go load the data to it.
|
||||
create_view_statement=`hive -e "show create table ${db}.${i};" | grep "CREATE VIEW"` # This grep works here, as we do not want to match multiple-lines.
|
||||
if [ -z "$create_view_statement" ]; then # If it's a table, then go load the data to it.
|
||||
impala-shell --user ${HADOOP_USER_NAME} -i ${IMPALA_HOSTNAME} -q "compute stats ${db}.${i}";
|
||||
fi
|
||||
done
|
||||
|
|
@ -210,13 +208,12 @@ function copydb() {
|
|||
if [ "${entities_on_impala[@]}" == "${entities_on_ocean[@]}" ]; then
|
||||
echo -e "\nAll entities have been copied to Impala cluster.\n"
|
||||
else
|
||||
echo -e "\n\n1 OR MORE ENTITIES OF DB '${db}' FAILED TO BE COPIED TO IMPALA CLUSTER!\n\n"
|
||||
echo -e "\n\nERROR: 1 OR MORE ENTITIES OF DB '${db}' FAILED TO BE COPIED TO IMPALA CLUSTER!\n\n"
|
||||
rm -f error.log
|
||||
return 4
|
||||
fi
|
||||
|
||||
rm -f error.log
|
||||
|
||||
echo -e "\n\nFinished processing db: ${db}\n\n"
|
||||
}
|
||||
|
||||
|
|
|
|||
Loading…
Reference in New Issue