SparkBlockStats allows to repartition the input rdd via the numPartitions workflow parameter

dhp-workflows/dhp-dedup-openaire/src/main/java/eu/dnetlib/dhp/oa/dedup/AbstractSparkAction.java

@@ -28,6 +28,8 @@ import eu.dnetlib.pace.config.DedupConfig;
 
 abstract class AbstractSparkAction implements Serializable {
 
+	protected static final int NUM_PARTITIONS = 1000;
+
 	protected static final ObjectMapper OBJECT_MAPPER = new ObjectMapper()
 		.configure(DeserializationFeature.FAIL_ON_UNKNOWN_PROPERTIES, false);
 

dhp-workflows/dhp-dedup-openaire/src/main/java/eu/dnetlib/dhp/oa/dedup/SparkBlockStats.java

@@ -2,6 +2,7 @@
 package eu.dnetlib.dhp.oa.dedup;
 
 import java.io.IOException;
+import java.util.Optional;
 
 import org.apache.commons.io.IOUtils;
 import org.apache.spark.SparkConf;
@@ -23,8 +24,6 @@ import eu.dnetlib.dhp.utils.ISLookupClientFactory;
 import eu.dnetlib.enabling.is.lookup.rmi.ISLookUpException;
 import eu.dnetlib.enabling.is.lookup.rmi.ISLookUpService;
 import eu.dnetlib.pace.config.DedupConfig;
-import eu.dnetlib.pace.model.FieldListImpl;
-import eu.dnetlib.pace.model.FieldValueImpl;
 import eu.dnetlib.pace.model.MapDocument;
 import eu.dnetlib.pace.util.MapDocumentUtil;
 import scala.Tuple2;
@@ -47,12 +46,6 @@ public class SparkBlockStats extends AbstractSparkAction {
 		parser.parseArgument(args);
 
 		SparkConf conf = new SparkConf();
-        conf.set("spark.serializer", "org.apache.spark.serializer.KryoSerializer");
-        conf
-                .registerKryoClasses(
-                        new Class[] {
-                                MapDocument.class, FieldListImpl.class, FieldValueImpl.class, Block.class
-                        });
 
 		new SparkBlockStats(parser, getSparkSession(conf))
 			.run(ISLookupClientFactory.getLookUpService(parser.get("isLookUpUrl")));
@@ -76,6 +69,10 @@ public class SparkBlockStats extends AbstractSparkAction {
 		final String isLookUpUrl = parser.get("isLookUpUrl");
 		final String actionSetId = parser.get("actionSetId");
 		final String workingPath = parser.get("workingPath");
+		final int numPartitions = Optional
+			.ofNullable(parser.get("numPartitions"))
+			.map(Integer::valueOf)
+			.orElse(NUM_PARTITIONS);
 
 		log.info("graphBasePath: '{}'", graphBasePath);
 		log.info("isLookUpUrl:   '{}'", isLookUpUrl);
@@ -95,6 +92,7 @@ public class SparkBlockStats extends AbstractSparkAction {
 
 			JavaPairRDD<String, MapDocument> mapDocuments = sc
 				.textFile(DedupUtility.createEntityPath(graphBasePath, subEntity))
+				.repartition(numPartitions)
 				.mapToPair(
 					(PairFunction<String, String, MapDocument>) s -> {
 						MapDocument d = MapDocumentUtil.asMapDocumentWithJPath(dedupConf, s);
@@ -105,6 +103,7 @@ public class SparkBlockStats extends AbstractSparkAction {
 			JavaPairRDD<String, Block> blocks = Deduper.createSortedBlocks(mapDocuments, dedupConf);
 
 			JavaRDD<BlockStats> blockStats = blocks
+				.repartition(numPartitions)
 				.map(
 					b -> new BlockStats(
 						b._1(),

dhp-workflows/dhp-dedup-openaire/src/main/java/eu/dnetlib/dhp/oa/dedup/SparkCreateSimRels.java

@@ -35,8 +35,6 @@ public class SparkCreateSimRels extends AbstractSparkAction {
 
 	private static final Logger log = LoggerFactory.getLogger(SparkCreateSimRels.class);
 
-	public static final int NUM_PARTITIONS = 1000;
-
 	public SparkCreateSimRels(ArgumentApplicationParser parser, SparkSession spark) {
 		super(parser, spark);
 	}

dhp-workflows/dhp-dedup-openaire/src/main/resources/eu/dnetlib/dhp/oa/dedup/createBlockStats_parameters.json

@@ -22,5 +22,11 @@
     "paramLongName": "workingPath",
     "paramDescription": "path of the working directory",
     "paramRequired": true
+  },
+  {
+    "paramName": "np",
+    "paramLongName": "numPartitions",
+    "paramDescription": "number of partitions for the similarity relations intermediate phases",
+    "paramRequired": false
   }
 ]

dhp-workflows/dhp-dedup-openaire/src/main/resources/eu/dnetlib/dhp/oa/dedup/statistics/oozie_app/workflow.xml

@@ -12,6 +12,10 @@
             <name>actionSetId</name>
             <description>id of the actionSet</description>
         </property>
+        <property>
+            <name>numPartitions</name>
+            <description>number of partitions for the similarity relations intermediate phases</description>
+        </property>
         <property>
             <name>sparkDriverMemory</name>
             <description>memory for driver process</description>
@@ -90,10 +94,11 @@
                 --conf spark.eventLog.dir=${nameNode}${spark2EventLogDir}
                 --conf spark.sql.shuffle.partitions=3840
             </spark-opts>
-            <arg>--i</arg><arg>${graphBasePath}</arg>
-            <arg>--la</arg><arg>${isLookUpUrl}</arg>
-            <arg>--asi</arg><arg>${actionSetId}</arg>
-            <arg>--w</arg><arg>${workingDir}</arg>
+            <arg>--graphBasePath</arg><arg>${graphBasePath}</arg>
+            <arg>--isLookUpUrl</arg><arg>${isLookUpUrl}</arg>
+            <arg>--actionSetId</arg><arg>${actionSetId}</arg>
+            <arg>--workingPath</arg><arg>${workingDir}</arg>
+            <arg>--numPartitions</arg><arg>${numPartitions}</arg>
         </spark>
         <ok to="End"/>
         <error to="Kill"/>