Upgrade the copying operation to Impala Cluster:
- Use only hive commands in the Ocean Cluster, as the "impala-shell" will be removed from there to free-up resources. - Hugely improve the performance in every aspect of the copying process: a) speedup file-transferring and DB-deletion, b) eliminate permissions-assignment, "load" operations and "use $db" queries, c) retry only the "create view" statements and only as long as they depend on other non-created views, instead of trying to recreate all tables and views 5 consecutive times. - Add error-checks for the creation of tables and views.
This commit is contained in:
parent
b7c8acc563
commit
abf0b69f29
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@ -8,9 +8,13 @@ fi
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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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IMPALA_HDFS_NODE=''
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COUNTER=0
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while [ $COUNTER -lt 3 ]; do
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if hdfs dfs -test -e hdfs://impala-cluster-mn1.openaire.eu/tmp >/dev/null 2>&1; then
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IMPALA_HDFS_NODE='hdfs://impala-cluster-mn1.openaire.eu:8020'
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@ -24,71 +28,178 @@ while [ $COUNTER -lt 3 ]; do
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fi
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((COUNTER++))
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done
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if [ -z "$IMPALA_HDFS_NODE" ]; then
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echo -e "\n\nPROBLEM WHEN SETTING THE HDFS-NODE FOR IMPALA CLUSTER! $COUNTER\n\n"
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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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exit 1
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fi
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echo "Active IMPALA HDFS Node: ${IMPALA_HDFS_NODE} , after ${COUNTER} retries."
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IMPALA_HOSTNAME='impala-cluster-dn1.openaire.eu'
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IMPALA_CONFIG_FILE='/etc/impala_cluster/hdfs-site.xml'
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IMPALA_HDFS_DB_BASE_PATH="${IMPALA_HDFS_NODE}/user/hive/warehouse"
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# Set sed arguments.
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LOCATION_HDFS_NODE_SED_ARG="s|${OCEAN_HDFS_NODE}|${IMPALA_HDFS_NODE}|g" # This requires to be used with "sed -e" in order to have the "|" delimiter (as the "/" conflicts with the URIs)
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# Set the SED command arguments for column-names with reserved words:
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DATE_SED_ARG_1='s/[[:space:]]\date[[:space:]]/\`date\`/g'
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DATE_SED_ARG_2='s/\.date,/\.\`date\`,/g' # the "date" may be part of a larger field name like "datestamp" or "date_aggregated", so we need to be careful with what we are replacing.
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DATE_SED_ARG_3='s/\.date[[:space:]]/\.\`date\` /g'
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HASH_SED_ARG_1='s/[[:space:]]\hash[[:space:]]/\`hash\`/g'
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HASH_SED_ARG_2='s/\.hash,/\.\`hash\`,/g'
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HASH_SED_ARG_3='s/\.hash[[:space:]]/\.\`hash\` /g'
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LOCATION_SED_ARG_1='s/[[:space:]]\location[[:space:]]/\`location\`/g'
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LOCATION_SED_ARG_2='s/\.location,/\.\`location\`,/g'
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LOCATION_SED_ARG_3='s/\.location[[:space:]]/\.\`location\` /g'
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function copydb() {
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db=$1
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FILE=("hive_wf_tmp_"$RANDOM)
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hdfs dfs -mkdir ${IMPALA_HDFS_NODE}/tmp/$FILE/
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# change ownership to impala
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# hdfs dfs -conf /etc/impala_cluster/hdfs-site.xml -chmod -R 777 /tmp/$FILE/${db}.db
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hdfs dfs -conf /etc/impala_cluster/hdfs-site.xml -chmod -R 777 /tmp/$FILE/
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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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rm -f error.log
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exit 2
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fi
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# Make Impala aware of the deletion of the old DB immediately.
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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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# copy the databases from ocean to impala
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echo "copying $db"
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hadoop distcp -Dmapreduce.map.memory.mb=6144 -pb hdfs://nameservice1/user/hive/warehouse/${db}.db ${IMPALA_HDFS_NODE}/tmp/$FILE/
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echo "Copying $db files from Ocean to Impala cluster.."
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# Using max-bandwidth of: 50 * 100 Mb/s = 5 Gb/s
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# Using max memory of: 50 * 6144 = 300 Gb
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# Using 1MB as a buffer-size.
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# The " -Ddistcp.dynamic.recordsPerChunk=50" arg is not available in our version of hadoop
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# The "ug" args cannot be used as we get a "User does not belong to hive" error.
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# The "p" argument cannot be used, as it blocks the files from being used, giving a "sticky bit"-error, even after applying chmod and chown onm the files.
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hadoop distcp -Dmapreduce.map.memory.mb=6144 -m 70 -bandwidth 150 \
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-numListstatusThreads 40 \
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-copybuffersize 1048576 \
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-strategy dynamic \
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-pb \
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${OCEAN_HDFS_NODE}/user/hive/warehouse/${db}.db ${IMPALA_HDFS_DB_BASE_PATH}
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hdfs dfs -conf /etc/impala_cluster/hdfs-site.xml -chmod -R 777 /tmp/$FILE/${db}.db
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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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# drop tables from db
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for i in `impala-shell -i impala-cluster-dn1.openaire.eu -d ${db} --delimited -q "show tables"`;
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do
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`impala-shell -i impala-cluster-dn1.openaire.eu -d ${db} -q "drop table $i;"`;
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done
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echo "Creating schema for ${db}"
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# drop views from db
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for i in `impala-shell -i impala-cluster-dn1.openaire.eu -d ${db} --delimited -q "show tables"`;
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do
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`impala-shell -i impala-cluster-dn1.openaire.eu -d ${db} -q "drop view $i;"`;
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done
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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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# delete the database
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impala-shell -i impala-cluster-dn1.openaire.eu -q "drop database if exists ${db} cascade";
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# Make Impala aware of the creation of the new DB immediately.
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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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# 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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# create the databases
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impala-shell -i impala-cluster-dn1.openaire.eu -q "create database ${db}";
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all_create_view_commands=()
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impala-shell -q "INVALIDATE METADATA"
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echo "creating schema for ${db}"
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for (( k = 0; k < 5; k ++ )); do
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for i in `impala-shell -d ${db} --delimited -q "show tables"`;
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do
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impala-shell -d ${db} --delimited -q "show create table $i";
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done | sed 's/"$/;/' | sed 's/^"//' | sed 's/[[:space:]]\date[[:space:]]/`date`/g' | impala-shell --user $HADOOP_USER_NAME -i impala-cluster-dn1.openaire.eu -c -f -
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for i in `hive -e "show tables in ${db};" | sed 's/WARN:.*//g'`; do # Get the tables and views without any potential the "WARN" logs.
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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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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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| 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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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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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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fi
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fi
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fi
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done
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# load the data from /tmp in the respective tables
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echo "copying data in tables and computing stats"
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for i in `impala-shell -i impala-cluster-dn1.openaire.eu -d ${db} --delimited -q "show tables"`;
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do
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impala-shell -i impala-cluster-dn1.openaire.eu -d ${db} -q "load data inpath '/tmp/$FILE/${db}.db/$i' into table $i";
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impala-shell -i impala-cluster-dn1.openaire.eu -d ${db} -q "compute stats $i";
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done
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echo -e "\nAll tables have been created, going to create the views..\n"
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# deleting the remaining directory from hdfs
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hdfs dfs -conf /etc/impala_cluster/hdfs-site.xml -rm -R /tmp/$FILE/${db}.db
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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 ${IMPALA_HOSTNAME} -q "INVALIDATE METADATA"
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sleep 1
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# Time to loop through the views and create them.
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# At this point all table-schemas should have been created.
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echo -e "\nAll_create_view_commands:\n\n${all_create_view_commands[@]}\n\n" # DEBUG
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should_retry=1 # Should retry creating the views (in case their tables where not created before them).
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# There are views of other views as well, so we may have 3,4,5 nested-view and need to retry..
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previous_num_of_views_to_retry=${#all_create_view_commands}
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while ((should_retry)); do
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# The only accepted reason for a view to not be created, is if it depends on another view, which has not been created yet.
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# In this case, we should retry creating this particular view again.
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should_retry=0 # We should NOT do another iteration, unless at least one view could NOT be created.
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should_retry_create_view_commands=()
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for create_view_command in "${all_create_view_commands[@]}"; do # Get the tables and views without any potential the "WARN" logs.
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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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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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echo -e "\nspecific_errors: ${specific_errors}\n"
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if [ -n "$specific_errors" ]; then
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echo -e "\nView '$(cat error.log | grep "CREATE VIEW " | sed 's/CREATE VIEW //g' | sed 's/ as select .*//g')' failed to be created, possibly because it depends on another view.\n"
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should_retry=1
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should_retry_create_view_commands+=("$create_view_command")
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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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echo -e "\nTo be retried \"create_view_commands\":\n\n${should_retry_create_view_commands[@]}\n"
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new_num_of_views_to_retry=${#should_retry_create_view_commands}
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if [[ $new_num_of_views_to_retry -eq $previous_num_of_views_to_retry ]]; then
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echo -e "THE NUMBER OF VIEWS TO RETRY HAS NOT BEEN REDUCED! THE SCRIPT IS LIKELY GOING TO AN INFINITE-LOOP! EXITING.."
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exit 3
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else
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previous_num_of_views_to_retry=$new_num_of_views_to_retry
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fi
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all_create_view_commands=$should_retry_create_view_command
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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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for i in `impala-shell --user ${HADOOP_USER_NAME} -i ${IMPALA_HOSTNAME} --delimited -q "show tables in ${db}"`; do
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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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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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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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MONITOR_DB=$1
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#HADOOP_USER_NAME=$2
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copydb $MONITOR_DB
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@ -8,9 +8,12 @@ fi
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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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IMPALA_HDFS_NODE=''
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COUNTER=0
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while [ $COUNTER -lt 3 ]; do
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if hdfs dfs -test -e hdfs://impala-cluster-mn1.openaire.eu/tmp >/dev/null 2>&1; then
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IMPALA_HDFS_NODE='hdfs://impala-cluster-mn1.openaire.eu:8020'
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@ -24,70 +27,178 @@ while [ $COUNTER -lt 3 ]; do
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fi
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((COUNTER++))
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done
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if [ -z "$IMPALA_HDFS_NODE" ]; then
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echo -e "\n\nPROBLEM WHEN SETTING THE HDFS-NODE FOR IMPALA CLUSTER! $COUNTER\n\n"
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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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exit 1
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fi
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echo "Active IMPALA HDFS Node: ${IMPALA_HDFS_NODE} , after ${COUNTER} retries."
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IMPALA_HOSTNAME='impala-cluster-dn1.openaire.eu'
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IMPALA_CONFIG_FILE='/etc/impala_cluster/hdfs-site.xml'
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IMPALA_HDFS_DB_BASE_PATH="${IMPALA_HDFS_NODE}/user/hive/warehouse"
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# Set sed arguments.
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LOCATION_HDFS_NODE_SED_ARG="s|${OCEAN_HDFS_NODE}|${IMPALA_HDFS_NODE}|g" # This requires to be used with "sed -e" in order to have the "|" delimiter (as the "/" conflicts with the URIs)
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# Set the SED command arguments for column-names with reserved words:
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DATE_SED_ARG_1='s/[[:space:]]\date[[:space:]]/\`date\`/g'
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DATE_SED_ARG_2='s/\.date,/\.\`date\`,/g' # the "date" may be part of a larger field name like "datestamp" or "date_aggregated", so we need to be careful with what we are replacing.
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DATE_SED_ARG_3='s/\.date[[:space:]]/\.\`date\` /g'
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HASH_SED_ARG_1='s/[[:space:]]\hash[[:space:]]/\`hash\`/g'
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HASH_SED_ARG_2='s/\.hash,/\.\`hash\`,/g'
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HASH_SED_ARG_3='s/\.hash[[:space:]]/\.\`hash\` /g'
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LOCATION_SED_ARG_1='s/[[:space:]]\location[[:space:]]/\`location\`/g'
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LOCATION_SED_ARG_2='s/\.location,/\.\`location\`,/g'
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LOCATION_SED_ARG_3='s/\.location[[:space:]]/\.\`location\` /g'
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function copydb() {
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db=$1
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FILE=("hive_wf_tmp_"$RANDOM)
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hdfs dfs -mkdir ${IMPALA_HDFS_NODE}/tmp/$FILE/
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# change ownership to impala
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# hdfs dfs -conf /etc/impala_cluster/hdfs-site.xml -chmod -R 777 /tmp/$FILE/${db}.db
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hdfs dfs -conf /etc/impala_cluster/hdfs-site.xml -chmod -R 777 /tmp/$FILE/
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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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rm -f error.log
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exit 2
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fi
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# Make Impala aware of the deletion of the old DB immediately.
|
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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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|
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# copy the databases from ocean to impala
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echo "copying $db"
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hadoop distcp -Dmapreduce.map.memory.mb=6144 -pb hdfs://nameservice1/user/hive/warehouse/${db}.db ${IMPALA_HDFS_NODE}/tmp/$FILE/
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echo "Copying $db files from Ocean to Impala cluster.."
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# 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.
|
||||
# The " -Ddistcp.dynamic.recordsPerChunk=50" arg is not available in our version of hadoop
|
||||
# The "ug" args cannot be used as we get a "User does not belong to hive" error.
|
||||
# The "p" argument cannot be used, as it blocks the files from being used, giving a "sticky bit"-error, even after applying chmod and chown onm the files.
|
||||
hadoop distcp -Dmapreduce.map.memory.mb=6144 -m 70 -bandwidth 150 \
|
||||
-numListstatusThreads 40 \
|
||||
-copybuffersize 1048576 \
|
||||
-strategy dynamic \
|
||||
-pb \
|
||||
${OCEAN_HDFS_NODE}/user/hive/warehouse/${db}.db ${IMPALA_HDFS_DB_BASE_PATH}
|
||||
|
||||
hdfs dfs -conf /etc/impala_cluster/hdfs-site.xml -chmod -R 777 /tmp/$FILE/${db}.db
|
||||
# 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
|
||||
|
||||
# drop tables from db
|
||||
for i in `impala-shell -i impala-cluster-dn1.openaire.eu -d ${db} --delimited -q "show tables"`;
|
||||
do
|
||||
`impala-shell -i impala-cluster-dn1.openaire.eu -d ${db} -q "drop table $i;"`;
|
||||
done
|
||||
echo "Creating schema for ${db}"
|
||||
|
||||
# drop views from db
|
||||
for i in `impala-shell -i impala-cluster-dn1.openaire.eu -d ${db} --delimited -q "show tables"`;
|
||||
do
|
||||
`impala-shell -i impala-cluster-dn1.openaire.eu -d ${db} -q "drop view $i;"`;
|
||||
done
|
||||
# create the new database (with the same name)
|
||||
impala-shell --user ${HADOOP_USER_NAME} -i ${IMPALA_HOSTNAME} -q "create database ${db}"
|
||||
|
||||
# delete the database
|
||||
impala-shell -i impala-cluster-dn1.openaire.eu -q "drop database if exists ${db} cascade";
|
||||
# Make Impala aware of the creation of the new DB immediately.
|
||||
sleep 1
|
||||
impala-shell --user ${HADOOP_USER_NAME} -i ${IMPALA_HOSTNAME} -q "INVALIDATE METADATA"
|
||||
sleep 1
|
||||
# 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.
|
||||
|
||||
# create the databases
|
||||
impala-shell -i impala-cluster-dn1.openaire.eu -q "create database ${db}";
|
||||
all_create_view_commands=()
|
||||
|
||||
impala-shell -q "INVALIDATE METADATA"
|
||||
echo "creating schema for ${db}"
|
||||
for (( k = 0; k < 5; k ++ )); do
|
||||
for i in `impala-shell -d ${db} --delimited -q "show tables"`;
|
||||
do
|
||||
impala-shell -d ${db} --delimited -q "show create table $i";
|
||||
done | sed 's/"$/;/' | sed 's/^"//' | sed 's/[[:space:]]\date[[:space:]]/`date`/g' | impala-shell --user $HADOOP_USER_NAME -i impala-cluster-dn1.openaire.eu -c -f -
|
||||
for i in `hive -e "show tables in ${db};" | sed 's/WARN:.*//g'`; do # Get the tables and views without any potential the "WARN" logs.
|
||||
# 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.
|
||||
|
||||
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' \
|
||||
| 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")
|
||||
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"
|
||||
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"
|
||||
fi
|
||||
fi
|
||||
fi
|
||||
done
|
||||
|
||||
# load the data from /tmp in the respective tables
|
||||
echo "copying data in tables and computing stats"
|
||||
for i in `impala-shell -i impala-cluster-dn1.openaire.eu -d ${db} --delimited -q "show tables"`;
|
||||
do
|
||||
impala-shell -i impala-cluster-dn1.openaire.eu -d ${db} -q "load data inpath '/tmp/$FILE/${db}.db/$i' into table $i";
|
||||
impala-shell -i impala-cluster-dn1.openaire.eu -d ${db} -q "compute stats $i";
|
||||
done
|
||||
echo -e "\nAll tables have been created, going to create the views..\n"
|
||||
|
||||
# deleting the remaining directory from hdfs
|
||||
hdfs dfs -conf /etc/impala_cluster/hdfs-site.xml -rm -R /tmp/$FILE/${db}.db
|
||||
# Make Impala aware of the new tables.
|
||||
sleep 1
|
||||
impala-shell --user ${HADOOP_USER_NAME} -i ${IMPALA_HOSTNAME} -q "INVALIDATE METADATA"
|
||||
sleep 1
|
||||
|
||||
# Time to loop through the views and create them.
|
||||
# At this point all table-schemas should have been created.
|
||||
echo -e "\nAll_create_view_commands:\n\n${all_create_view_commands[@]}\n\n" # DEBUG
|
||||
|
||||
should_retry=1 # Should retry creating the views (in case their tables where not created before them).
|
||||
# There are views of other views as well, so we may have 3,4,5 nested-view and need to retry..
|
||||
|
||||
previous_num_of_views_to_retry=${#all_create_view_commands}
|
||||
|
||||
while ((should_retry)); do
|
||||
|
||||
# The only accepted reason for a view to not be created, is if it depends on another view, which has not been created yet.
|
||||
# In this case, we should retry creating this particular view again.
|
||||
should_retry=0 # We should NOT do another iteration, unless at least one view could NOT be created.
|
||||
|
||||
should_retry_create_view_commands=()
|
||||
|
||||
for create_view_command in "${all_create_view_commands[@]}"; do # Get the tables and views without any potential the "WARN" logs.
|
||||
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
|
||||
specific_errors=`cat error.log | grep -E "FAILED: ParseException line 1:13 missing TABLE at 'view'|ERROR: AnalysisException: Could not resolve table reference:"`
|
||||
echo -e "\nspecific_errors: ${specific_errors}\n"
|
||||
if [ -n "$specific_errors" ]; then
|
||||
echo -e "\nView '$(cat error.log | grep "CREATE VIEW " | sed 's/CREATE VIEW //g' | sed 's/ as select .*//g')' failed to be created, possibly because it depends on another view.\n"
|
||||
should_retry=1
|
||||
should_retry_create_view_commands+=("$create_view_command")
|
||||
else
|
||||
sleep 1 # Wait a bit for Impala to register that the view was created, before possibly referencing it by another view.
|
||||
fi
|
||||
done
|
||||
|
||||
echo -e "\nTo be retried \"create_view_commands\":\n\n${should_retry_create_view_commands[@]}\n"
|
||||
|
||||
new_num_of_views_to_retry=${#should_retry_create_view_commands}
|
||||
if [[ $new_num_of_views_to_retry -eq $previous_num_of_views_to_retry ]]; then
|
||||
echo -e "THE NUMBER OF VIEWS TO RETRY HAS NOT BEEN REDUCED! THE SCRIPT IS LIKELY GOING TO AN INFINITE-LOOP! EXITING.."
|
||||
exit 3
|
||||
else
|
||||
previous_num_of_views_to_retry=$new_num_of_views_to_retry
|
||||
fi
|
||||
|
||||
all_create_view_commands=$should_retry_create_view_command
|
||||
done
|
||||
|
||||
sleep 1
|
||||
impala-shell --user ${HADOOP_USER_NAME} -i ${IMPALA_HOSTNAME} -q "INVALIDATE METADATA"
|
||||
sleep 1
|
||||
|
||||
echo "Computing stats for tables.."
|
||||
for i in `impala-shell --user ${HADOOP_USER_NAME} -i ${IMPALA_HOSTNAME} --delimited -q "show tables in ${db}"`; do
|
||||
# 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.
|
||||
impala-shell --user ${HADOOP_USER_NAME} -i ${IMPALA_HOSTNAME} -q "compute stats ${db}.${i}";
|
||||
fi
|
||||
done
|
||||
|
||||
rm -f error.log
|
||||
|
||||
echo -e "\n\nFinished processing db: ${db}\n\n"
|
||||
}
|
||||
|
||||
|
||||
MONITOR_DB=$1
|
||||
#HADOOP_USER_NAME=$2
|
||||
copydb $MONITOR_DB
|
||||
|
|
|
|||
|
|
@ -8,9 +8,12 @@ fi
|
|||
|
||||
#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}"
|
||||
|
||||
IMPALA_HDFS_NODE=''
|
||||
COUNTER=0
|
||||
|
||||
while [ $COUNTER -lt 3 ]; do
|
||||
if hdfs dfs -test -e hdfs://impala-cluster-mn1.openaire.eu/tmp >/dev/null 2>&1; then
|
||||
IMPALA_HDFS_NODE='hdfs://impala-cluster-mn1.openaire.eu:8020'
|
||||
|
|
@ -24,73 +27,182 @@ while [ $COUNTER -lt 3 ]; do
|
|||
fi
|
||||
((COUNTER++))
|
||||
done
|
||||
|
||||
if [ -z "$IMPALA_HDFS_NODE" ]; then
|
||||
echo -e "\n\nPROBLEM WHEN SETTING THE HDFS-NODE FOR IMPALA CLUSTER! $COUNTER\n\n"
|
||||
echo -e "\n\nPROBLEM 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 ${COUNTER} retries."
|
||||
|
||||
IMPALA_HOSTNAME='impala-cluster-dn1.openaire.eu'
|
||||
IMPALA_CONFIG_FILE='/etc/impala_cluster/hdfs-site.xml'
|
||||
|
||||
IMPALA_HDFS_DB_BASE_PATH="${IMPALA_HDFS_NODE}/user/hive/warehouse"
|
||||
|
||||
|
||||
# Set sed arguments.
|
||||
LOCATION_HDFS_NODE_SED_ARG="s|${OCEAN_HDFS_NODE}|${IMPALA_HDFS_NODE}|g" # This requires to be used with "sed -e" in order to have the "|" delimiter (as the "/" conflicts with the URIs)
|
||||
|
||||
# Set the SED command arguments for column-names with reserved words:
|
||||
DATE_SED_ARG_1='s/[[:space:]]\date[[:space:]]/\`date\`/g'
|
||||
DATE_SED_ARG_2='s/\.date,/\.\`date\`,/g' # the "date" may be part of a larger field name like "datestamp" or "date_aggregated", so we need to be careful with what we are replacing.
|
||||
DATE_SED_ARG_3='s/\.date[[:space:]]/\.\`date\` /g'
|
||||
|
||||
HASH_SED_ARG_1='s/[[:space:]]\hash[[:space:]]/\`hash\`/g'
|
||||
HASH_SED_ARG_2='s/\.hash,/\.\`hash\`,/g'
|
||||
HASH_SED_ARG_3='s/\.hash[[:space:]]/\.\`hash\` /g'
|
||||
|
||||
LOCATION_SED_ARG_1='s/[[:space:]]\location[[:space:]]/\`location\`/g'
|
||||
LOCATION_SED_ARG_2='s/\.location,/\.\`location\`,/g'
|
||||
LOCATION_SED_ARG_3='s/\.location[[:space:]]/\.\`location\` /g'
|
||||
|
||||
|
||||
export HADOOP_USER="dimitris.pierrakos"
|
||||
export HADOOP_USER_NAME='dimitris.pierrakos'
|
||||
|
||||
|
||||
function copydb() {
|
||||
|
||||
export HADOOP_USER="dimitris.pierrakos"
|
||||
export HADOOP_USER_NAME='dimitris.pierrakos'
|
||||
|
||||
db=$1
|
||||
FILE=("hive_wf_tmp_"$RANDOM)
|
||||
hdfs dfs -mkdir ${IMPALA_HDFS_NODE}/tmp/$FILE/φ
|
||||
|
||||
# change ownership to impala
|
||||
# hdfs dfs -conf /etc/impala_cluster/hdfs-site.xml -chmod -R 777 /tmp/$FILE/${db}.db
|
||||
hdfs dfs -conf /etc/impala_cluster/hdfs-site.xml -chmod -R 777 /tmp/$FILE/
|
||||
# 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"
|
||||
rm -f error.log
|
||||
exit 2
|
||||
fi
|
||||
|
||||
# Make Impala aware of the deletion of the old DB immediately.
|
||||
sleep 1
|
||||
impala-shell --user ${HADOOP_USER_NAME} -i ${IMPALA_HOSTNAME} -q "INVALIDATE METADATA"
|
||||
|
||||
# copy the databases from ocean to impala
|
||||
echo "copying $db"
|
||||
hadoop distcp -Dmapreduce.map.memory.mb=6144 -pb hdfs://nameservice1/user/hive/warehouse/${db}.db ${IMPALA_HDFS_NODE}/tmp/$FILE/
|
||||
echo "Copying $db files from Ocean to Impala cluster.."
|
||||
# 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.
|
||||
# The " -Ddistcp.dynamic.recordsPerChunk=50" arg is not available in our version of hadoop
|
||||
# The "ug" args cannot be used as we get a "User does not belong to hive" error.
|
||||
# The "p" argument cannot be used, as it blocks the files from being used, giving a "sticky bit"-error, even after applying chmod and chown onm the files.
|
||||
hadoop distcp -Dmapreduce.map.memory.mb=6144 -m 70 -bandwidth 150 \
|
||||
-numListstatusThreads 40 \
|
||||
-copybuffersize 1048576 \
|
||||
-strategy dynamic \
|
||||
-pb \
|
||||
${OCEAN_HDFS_NODE}/user/hive/warehouse/${db}.db ${IMPALA_HDFS_DB_BASE_PATH}
|
||||
|
||||
hdfs dfs -conf /etc/impala_cluster/hdfs-site.xml -chmod -R 777 /tmp/$FILE/${db}.db
|
||||
# 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
|
||||
|
||||
# drop tables from db
|
||||
for i in `impala-shell -i impala-cluster-dn1.openaire.eu -d ${db} --delimited -q "show tables"`;
|
||||
do
|
||||
`impala-shell -i impala-cluster-dn1.openaire.eu -d ${db} -q "drop table $i;"`;
|
||||
done
|
||||
echo "Creating schema for ${db}"
|
||||
|
||||
# drop views from db
|
||||
for i in `impala-shell -i impala-cluster-dn1.openaire.eu -d ${db} --delimited -q "show tables"`;
|
||||
do
|
||||
`impala-shell -i impala-cluster-dn1.openaire.eu -d ${db} -q "drop view $i;"`;
|
||||
done
|
||||
# create the new database (with the same name)
|
||||
impala-shell --user ${HADOOP_USER_NAME} -i ${IMPALA_HOSTNAME} -q "create database ${db}"
|
||||
|
||||
# delete the database
|
||||
impala-shell -i impala-cluster-dn1.openaire.eu -q "drop database if exists ${db} cascade";
|
||||
# Make Impala aware of the creation of the new DB immediately.
|
||||
sleep 1
|
||||
impala-shell --user ${HADOOP_USER_NAME} -i ${IMPALA_HOSTNAME} -q "INVALIDATE METADATA"
|
||||
sleep 1
|
||||
# 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.
|
||||
|
||||
# create the databases
|
||||
impala-shell -i impala-cluster-dn1.openaire.eu -q "create database ${db}";
|
||||
all_create_view_commands=()
|
||||
|
||||
impala-shell -q "INVALIDATE METADATA"
|
||||
echo "creating schema for ${db}"
|
||||
for (( k = 0; k < 5; k ++ )); do
|
||||
for i in `impala-shell -d ${db} --delimited -q "show tables"`;
|
||||
do
|
||||
impala-shell -d ${db} --delimited -q "show create table $i";
|
||||
done | sed 's/"$/;/' | sed 's/^"//' | sed 's/[[:space:]]\date[[:space:]]/`date`/g' | impala-shell --user $HADOOP_USER_NAME -i impala-cluster-dn1.openaire.eu -c -f -
|
||||
for i in `hive -e "show tables in ${db};" | sed 's/WARN:.*//g'`; do # Get the tables and views without any potential the "WARN" logs.
|
||||
# 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.
|
||||
|
||||
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' \
|
||||
| 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")
|
||||
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"
|
||||
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"
|
||||
fi
|
||||
fi
|
||||
fi
|
||||
done
|
||||
|
||||
# load the data from /tmp in the respective tables
|
||||
echo "copying data in tables and computing stats"
|
||||
for i in `impala-shell -i impala-cluster-dn1.openaire.eu -d ${db} --delimited -q "show tables"`;
|
||||
do
|
||||
impala-shell -i impala-cluster-dn1.openaire.eu -d ${db} -q "load data inpath '/tmp/$FILE/${db}.db/$i' into table $i";
|
||||
impala-shell -i impala-cluster-dn1.openaire.eu -d ${db} -q "compute stats $i";
|
||||
done
|
||||
echo -e "\nAll tables have been created, going to create the views..\n"
|
||||
|
||||
# deleting the remaining directory from hdfs
|
||||
hdfs dfs -conf /etc/impala_cluster/hdfs-site.xml -rm -R /tmp/$FILE/${db}.db
|
||||
# Make Impala aware of the new tables.
|
||||
sleep 1
|
||||
impala-shell --user ${HADOOP_USER_NAME} -i ${IMPALA_HOSTNAME} -q "INVALIDATE METADATA"
|
||||
sleep 1
|
||||
|
||||
# Time to loop through the views and create them.
|
||||
# At this point all table-schemas should have been created.
|
||||
echo -e "\nAll_create_view_commands:\n\n${all_create_view_commands[@]}\n\n" # DEBUG
|
||||
|
||||
should_retry=1 # Should retry creating the views (in case their tables where not created before them).
|
||||
# There are views of other views as well, so we may have 3,4,5 nested-view and need to retry..
|
||||
|
||||
previous_num_of_views_to_retry=${#all_create_view_commands}
|
||||
|
||||
while ((should_retry)); do
|
||||
|
||||
# The only accepted reason for a view to not be created, is if it depends on another view, which has not been created yet.
|
||||
# In this case, we should retry creating this particular view again.
|
||||
should_retry=0 # We should NOT do another iteration, unless at least one view could NOT be created.
|
||||
|
||||
should_retry_create_view_commands=()
|
||||
|
||||
for create_view_command in "${all_create_view_commands[@]}"; do # Get the tables and views without any potential the "WARN" logs.
|
||||
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
|
||||
specific_errors=`cat error.log | grep -E "FAILED: ParseException line 1:13 missing TABLE at 'view'|ERROR: AnalysisException: Could not resolve table reference:"`
|
||||
echo -e "\nspecific_errors: ${specific_errors}\n"
|
||||
if [ -n "$specific_errors" ]; then
|
||||
echo -e "\nView '$(cat error.log | grep "CREATE VIEW " | sed 's/CREATE VIEW //g' | sed 's/ as select .*//g')' failed to be created, possibly because it depends on another view.\n"
|
||||
should_retry=1
|
||||
should_retry_create_view_commands+=("$create_view_command")
|
||||
else
|
||||
sleep 1 # Wait a bit for Impala to register that the view was created, before possibly referencing it by another view.
|
||||
fi
|
||||
done
|
||||
|
||||
echo -e "\nTo be retried \"create_view_commands\":\n\n${should_retry_create_view_commands[@]}\n"
|
||||
|
||||
new_num_of_views_to_retry=${#should_retry_create_view_commands}
|
||||
if [[ $new_num_of_views_to_retry -eq $previous_num_of_views_to_retry ]]; then
|
||||
echo -e "THE NUMBER OF VIEWS TO RETRY HAS NOT BEEN REDUCED! THE SCRIPT IS LIKELY GOING TO AN INFINITE-LOOP! EXITING.."
|
||||
exit 3
|
||||
else
|
||||
previous_num_of_views_to_retry=$new_num_of_views_to_retry
|
||||
fi
|
||||
|
||||
all_create_view_commands=$should_retry_create_view_command
|
||||
done
|
||||
|
||||
sleep 1
|
||||
impala-shell --user ${HADOOP_USER_NAME} -i ${IMPALA_HOSTNAME} -q "INVALIDATE METADATA"
|
||||
sleep 1
|
||||
|
||||
echo "Computing stats for tables.."
|
||||
for i in `impala-shell --user ${HADOOP_USER_NAME} -i ${IMPALA_HOSTNAME} --delimited -q "show tables in ${db}"`; do
|
||||
# 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.
|
||||
impala-shell --user ${HADOOP_USER_NAME} -i ${IMPALA_HOSTNAME} -q "compute stats ${db}.${i}";
|
||||
fi
|
||||
done
|
||||
|
||||
rm -f error.log
|
||||
|
||||
echo -e "\n\nFinished processing db: ${db}\n\n"
|
||||
}
|
||||
|
||||
|
||||
MONITOR_DB=$1
|
||||
#HADOOP_USER_NAME=$2
|
||||
|
||||
|
|
|
|||
|
|
@ -6,9 +6,13 @@ then
|
|||
ln -sfn ${PYTHON_EGG_CACHE}${link_folder} ${link_folder}
|
||||
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}"
|
||||
|
||||
IMPALA_HDFS_NODE=''
|
||||
COUNTER=0
|
||||
|
||||
while [ $COUNTER -lt 3 ]; do
|
||||
if hdfs dfs -test -e hdfs://impala-cluster-mn1.openaire.eu/tmp >/dev/null 2>&1; then
|
||||
IMPALA_HDFS_NODE='hdfs://impala-cluster-mn1.openaire.eu:8020'
|
||||
|
|
@ -22,76 +26,178 @@ while [ $COUNTER -lt 3 ]; do
|
|||
fi
|
||||
((COUNTER++))
|
||||
done
|
||||
|
||||
if [ -z "$IMPALA_HDFS_NODE" ]; then
|
||||
echo -e "\n\nPROBLEM WHEN SETTING THE HDFS-NODE FOR IMPALA CLUSTER! $COUNTER\n\n"
|
||||
echo -e "\n\nPROBLEM 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 ${COUNTER} retries."
|
||||
|
||||
IMPALA_HOSTNAME='impala-cluster-dn1.openaire.eu'
|
||||
IMPALA_CONFIG_FILE='/etc/impala_cluster/hdfs-site.xml'
|
||||
|
||||
IMPALA_HDFS_DB_BASE_PATH="${IMPALA_HDFS_NODE}/user/hive/warehouse"
|
||||
|
||||
# Set sed arguments.
|
||||
LOCATION_HDFS_NODE_SED_ARG="s|${OCEAN_HDFS_NODE}|${IMPALA_HDFS_NODE}|g" # This requires to be used with "sed -e" in order to have the "|" delimiter (as the "/" conflicts with the URIs)
|
||||
|
||||
# Set the SED command arguments for column-names with reserved words:
|
||||
DATE_SED_ARG_1='s/[[:space:]]\date[[:space:]]/\`date\`/g'
|
||||
DATE_SED_ARG_2='s/\.date,/\.\`date\`,/g' # the "date" may be part of a larger field name like "datestamp" or "date_aggregated", so we need to be careful with what we are replacing.
|
||||
DATE_SED_ARG_3='s/\.date[[:space:]]/\.\`date\` /g'
|
||||
|
||||
HASH_SED_ARG_1='s/[[:space:]]\hash[[:space:]]/\`hash\`/g'
|
||||
HASH_SED_ARG_2='s/\.hash,/\.\`hash\`,/g'
|
||||
HASH_SED_ARG_3='s/\.hash[[:space:]]/\.\`hash\` /g'
|
||||
|
||||
LOCATION_SED_ARG_1='s/[[:space:]]\location[[:space:]]/\`location\`/g'
|
||||
LOCATION_SED_ARG_2='s/\.location,/\.\`location\`,/g'
|
||||
LOCATION_SED_ARG_3='s/\.location[[:space:]]/\.\`location\` /g'
|
||||
|
||||
|
||||
export HADOOP_USER_NAME=$6
|
||||
export PROD_USAGE_STATS_DB="openaire_prod_usage_stats"
|
||||
|
||||
|
||||
function copydb() {
|
||||
db=$1
|
||||
FILE=("hive_wf_tmp_"$RANDOM)
|
||||
hdfs dfs -mkdir ${IMPALA_HDFS_NODE}/tmp/$FILE/
|
||||
# copy the databases from ocean to impala
|
||||
|
||||
echo "copying $db"
|
||||
hadoop distcp -Dmapreduce.map.memory.mb=6144 -pb hdfs://nameservice1/user/hive/warehouse/${db}.db ${IMPALA_HDFS_NODE}/tmp/$FILE/
|
||||
# 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"
|
||||
rm -f error.log
|
||||
exit 2
|
||||
fi
|
||||
|
||||
# change ownership to impala
|
||||
hdfs dfs -conf /etc/impala_cluster/hdfs-site.xml -chmod -R 777 /tmp/$FILE/${db}.db
|
||||
# Make Impala aware of the deletion of the old DB immediately.
|
||||
sleep 1
|
||||
impala-shell --user ${HADOOP_USER_NAME} -i ${IMPALA_HOSTNAME} -q "INVALIDATE METADATA"
|
||||
|
||||
# drop tables from db
|
||||
for i in `impala-shell --user $HADOOP_USER_NAME -i impala-cluster-dn1.openaire.eu -d ${db} --delimited -q "show tables"`;
|
||||
do
|
||||
`impala-shell -i impala-cluster-dn1.openaire.eu -d ${db} -q "drop table $i;"`;
|
||||
done
|
||||
echo "Copying $db files from Ocean to Impala cluster.."
|
||||
# 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.
|
||||
# The " -Ddistcp.dynamic.recordsPerChunk=50" arg is not available in our version of hadoop
|
||||
# The "ug" args cannot be used as we get a "User does not belong to hive" error.
|
||||
# The "p" argument cannot be used, as it blocks the files from being used, giving a "sticky bit"-error, even after applying chmod and chown onm the files.
|
||||
hadoop distcp -Dmapreduce.map.memory.mb=6144 -m 70 -bandwidth 150 \
|
||||
-numListstatusThreads 40 \
|
||||
-copybuffersize 1048576 \
|
||||
-strategy dynamic \
|
||||
-pb \
|
||||
${OCEAN_HDFS_NODE}/user/hive/warehouse/${db}.db ${IMPALA_HDFS_DB_BASE_PATH}
|
||||
|
||||
# drop views from db
|
||||
for i in `impala-shell --user $HADOOP_USER_NAME -i impala-cluster-dn1.openaire.eu -d ${db} --delimited -q "show tables"`;
|
||||
do
|
||||
`impala-shell -i impala-cluster-dn1.openaire.eu -d ${db} -q "drop view $i;"`;
|
||||
done
|
||||
# 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
|
||||
|
||||
# delete the database
|
||||
impala-shell --user $HADOOP_USER_NAME -i impala-cluster-dn1.openaire.eu -q "drop database if exists ${db} cascade";
|
||||
echo "Creating schema for ${db}"
|
||||
|
||||
# create the databases
|
||||
impala-shell --user $HADOOP_USER_NAME -i impala-cluster-dn1.openaire.eu -q "create database ${db}";
|
||||
# create the new database (with the same name)
|
||||
impala-shell --user ${HADOOP_USER_NAME} -i ${IMPALA_HOSTNAME} -q "create database ${db}"
|
||||
|
||||
impala-shell --user $HADOOP_USER_NAME -q "INVALIDATE METADATA"
|
||||
echo "creating schema for ${db}"
|
||||
for (( k = 0; k < 5; k ++ )); do
|
||||
for i in `impala-shell --user $HADOOP_USER_NAME -d ${db} --delimited -q "show tables"`;
|
||||
do
|
||||
impala-shell --user $HADOOP_USER_NAME -d ${db} --delimited -q "show create table $i";
|
||||
done | sed 's/"$/;/' | sed 's/^"//' | sed 's/[[:space:]]\date[[:space:]]/`date`/g' | impala-shell --user $HADOOP_USER_NAME -i impala-cluster-dn1.openaire.eu -c -f -
|
||||
# Make Impala aware of the creation of the new DB immediately.
|
||||
sleep 1
|
||||
impala-shell --user ${HADOOP_USER_NAME} -i ${IMPALA_HOSTNAME} -q "INVALIDATE METADATA"
|
||||
sleep 1
|
||||
# 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=()
|
||||
|
||||
for i in `hive -e "show tables in ${db};" | sed 's/WARN:.*//g'`; do # Get the tables and views without any potential the "WARN" logs.
|
||||
# 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.
|
||||
|
||||
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' \
|
||||
| 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")
|
||||
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"
|
||||
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"
|
||||
fi
|
||||
fi
|
||||
fi
|
||||
done
|
||||
|
||||
# for i in `impala-shell --user $HADOOP_USER_NAME -d ${db} --delimited -q "show tables"`;
|
||||
# do
|
||||
# impala-shell --user $HADOOP_USER_NAME -d ${db} --delimited -q "show create table $i";
|
||||
# done | sed 's/"$/;/' | sed 's/^"//' | sed 's/[[:space:]]\date[[:space:]]/`date`/g' | impala-shell --user $HADOOP_USER_NAME -i impala-cluster-dn1.openaire.eu -c -f -
|
||||
#
|
||||
# # run the same command twice because we may have failures in the first run (due to views pointing to the same db)
|
||||
# for i in `impala-shell --user $HADOOP_USER_NAME -d ${db} --delimited -q "show tables"`;
|
||||
# do
|
||||
# impala-shell --user $HADOOP_USER_NAME -d ${db} --delimited -q "show create table $i";
|
||||
# done | sed 's/"$/;/' | sed 's/^"//' | sed 's/[[:space:]]\date[[:space:]]/`date`/g' | impala-shell --user $HADOOP_USER_NAME -i impala-cluster-dn1.openaire.eu -c -f -
|
||||
echo -e "\nAll tables have been created, going to create the views..\n"
|
||||
|
||||
# load the data from /tmp in the respective tables
|
||||
echo "copying data in tables and computing stats"
|
||||
for i in `impala-shell --user $HADOOP_USER_NAME -i impala-cluster-dn1.openaire.eu -d ${db} --delimited -q "show tables"`;
|
||||
do
|
||||
impala-shell --user $HADOOP_USER_NAME -i impala-cluster-dn1.openaire.eu -d ${db} -q "load data inpath '/tmp/$FILE/${db}.db/$i' into table $i";
|
||||
impala-shell --user $HADOOP_USER_NAME -i impala-cluster-dn1.openaire.eu -d ${db} -q "compute stats $i";
|
||||
done
|
||||
# Make Impala aware of the new tables.
|
||||
sleep 1
|
||||
impala-shell --user ${HADOOP_USER_NAME} -i ${IMPALA_HOSTNAME} -q "INVALIDATE METADATA"
|
||||
sleep 1
|
||||
|
||||
# deleting the remaining directory from hdfs
|
||||
hdfs dfs -conf /etc/impala_cluster/hdfs-site.xml -rm -R /tmp/$FILE/${db}.db
|
||||
# Time to loop through the views and create them.
|
||||
# At this point all table-schemas should have been created.
|
||||
echo -e "\nAll_create_view_commands:\n\n${all_create_view_commands[@]}\n\n" # DEBUG
|
||||
|
||||
should_retry=1 # Should retry creating the views (in case their tables where not created before them).
|
||||
# There are views of other views as well, so we may have 3,4,5 nested-view and need to retry..
|
||||
|
||||
previous_num_of_views_to_retry=${#all_create_view_commands}
|
||||
|
||||
while ((should_retry)); do
|
||||
|
||||
# The only accepted reason for a view to not be created, is if it depends on another view, which has not been created yet.
|
||||
# In this case, we should retry creating this particular view again.
|
||||
should_retry=0 # We should NOT do another iteration, unless at least one view could NOT be created.
|
||||
|
||||
should_retry_create_view_commands=()
|
||||
|
||||
for create_view_command in "${all_create_view_commands[@]}"; do # Get the tables and views without any potential the "WARN" logs.
|
||||
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
|
||||
specific_errors=`cat error.log | grep -E "FAILED: ParseException line 1:13 missing TABLE at 'view'|ERROR: AnalysisException: Could not resolve table reference:"`
|
||||
echo -e "\nspecific_errors: ${specific_errors}\n"
|
||||
if [ -n "$specific_errors" ]; then
|
||||
echo -e "\nView '$(cat error.log | grep "CREATE VIEW " | sed 's/CREATE VIEW //g' | sed 's/ as select .*//g')' failed to be created, possibly because it depends on another view.\n"
|
||||
should_retry=1
|
||||
should_retry_create_view_commands+=("$create_view_command")
|
||||
else
|
||||
sleep 1 # Wait a bit for Impala to register that the view was created, before possibly referencing it by another view.
|
||||
fi
|
||||
done
|
||||
|
||||
echo -e "\nTo be retried \"create_view_commands\":\n\n${should_retry_create_view_commands[@]}\n"
|
||||
|
||||
new_num_of_views_to_retry=${#should_retry_create_view_commands}
|
||||
if [[ $new_num_of_views_to_retry -eq $previous_num_of_views_to_retry ]]; then
|
||||
echo -e "THE NUMBER OF VIEWS TO RETRY HAS NOT BEEN REDUCED! THE SCRIPT IS LIKELY GOING TO AN INFINITE-LOOP! EXITING.."
|
||||
exit 3
|
||||
else
|
||||
previous_num_of_views_to_retry=$new_num_of_views_to_retry
|
||||
fi
|
||||
|
||||
all_create_view_commands=$should_retry_create_view_command
|
||||
done
|
||||
|
||||
sleep 1
|
||||
impala-shell --user ${HADOOP_USER_NAME} -i ${IMPALA_HOSTNAME} -q "INVALIDATE METADATA"
|
||||
sleep 1
|
||||
|
||||
echo "Computing stats for tables.."
|
||||
for i in `impala-shell --user ${HADOOP_USER_NAME} -i ${IMPALA_HOSTNAME} --delimited -q "show tables in ${db}"`; do
|
||||
# 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.
|
||||
impala-shell --user ${HADOOP_USER_NAME} -i ${IMPALA_HOSTNAME} -q "compute stats ${db}.${i}";
|
||||
fi
|
||||
done
|
||||
|
||||
rm -f error.log
|
||||
|
||||
echo -e "\n\nFinished processing db: ${db}\n\n"
|
||||
}
|
||||
|
||||
STATS_DB=$1
|
||||
|
|
|
|||
Loading…
Reference in New Issue