hi akhil Not exactly ,the task took 54s to finish, started from 16:14:02 and ended at 16:14:56. within this 54s , it needs 19s to store value in memory, which started from 16:14:23 and ended at 16:14:42. I think this is the most time-wasting part of this task ,also unreasonable.You may check the log attached in previous mail. and here is my codes:
import org.apache.spark._ object GeneCompare3 { def main(args: Array[String]) { //i:piece number, j:user number val i = args(0).toInt val j = args(1) val conf = new SparkConf().setAppName("CompareGenePiece " + i + " of User " + j).setMaster("spark://slave3:7077").set("spark.executor.memory", "2g") val sc = new SparkContext(conf) println("start to compare gene") val runmodifyshell2 = List("run", "sort.sh") val runmodifyshellRDD2 = sc.makeRDD(runmodifyshell2) val pipeModify2 = runmodifyshellRDD2.pipe("sh /opt/sh/bin/sort.sh /opt/data/shellcompare/db/chr" + i + ".txt /opt/data/shellcompare/data/user" + j + "/pgs/sample/samplechr" + i + ".txt /opt/data/shellcompare/data/user" + j + "/pgs/intermediateResult/result" + i + ".txt 600") pipeModify2.collect() sc.stop() } } -------------------------------- Thanks&Best regards! San.Luo ----- 原始邮件 ----- 发件人:Akhil Das <ak...@sigmoidanalytics.com> 收件人:罗辉 <luohui20...@sina.com> 抄送人:user <user@spark.apache.org> 主题:Re: Re: How to decrease the time of storing block in memory 日期:2015年06月09日 16点51分 Is it that task taking 19s? It won't be simply taking 19s to store 2KB of data into memory there could be other operations happening too (the transformations that you are doing), It would be good if you can paste the code snippet that you are running to have a better understanding.ThanksBest Regards On Tue, Jun 9, 2015 at 2:09 PM, <luohui20...@sina.com> wrote: Only 1 minor GC, 0.07s. -------------------------------- Thanks&Best regards! San.Luo ----- 原始邮件 ----- 发件人:Akhil Das <ak...@sigmoidanalytics.com> 收件人:罗辉 <luohui20...@sina.com> 抄送人:user <user@spark.apache.org> 主题:Re: How to decrease the time of storing block in memory 日期:2015年06月09日 15点02分 May be you should check in your driver UI and see if there's any GC time involved etc. ThanksBest Regards On Mon, Jun 8, 2015 at 5:45 PM, <luohui20...@sina.com> wrote: hi there I am trying to descrease my app's running time in worker node. I checked the log and found the most time-wasting part is below:15/06/08 16:14:23 INFO storage.MemoryStore: Block broadcast_0 stored as values in memory (estimated size 2.1 KB, free 353.3 MB) 15/06/08 16:14:42 INFO executor.Executor: Finished task 0.0 in stage 0.0 (TID 0). 693 bytes result sent to driver I don't know why it needs 19s to storing 2.1KB size data to memory. Is there any tuning method? The attache is the full log, here it is:15/06/08 16:14:02 INFO executor.CoarseGrainedExecutorBackend: Registered signal handlers for [TERM, HUP, INT] 15/06/08 16:14:07 WARN util.NativeCodeLoader: Unable to load native-hadoop library for your platform... using builtin-java classes where applicable 15/06/08 16:14:10 INFO spark.SecurityManager: Changing view acls to: root 15/06/08 16:14:10 INFO spark.SecurityManager: Changing modify acls to: root 15/06/08 16:14:10 INFO spark.SecurityManager: SecurityManager: authentication disabled; ui acls disabled; users with view permissions: Set(root); users with modify permissions: Set(root) 15/06/08 16:14:14 INFO slf4j.Slf4jLogger: Slf4jLogger started 15/06/08 16:14:14 INFO Remoting: Starting remoting 15/06/08 16:14:15 INFO Remoting: Remoting started; listening on addresses :[akka.tcp://driverPropsFetcher@slave5:54684] 15/06/08 16:14:15 INFO util.Utils: Successfully started service 'driverPropsFetcher' on port 54684. 15/06/08 16:14:16 INFO spark.SecurityManager: Changing view acls to: root 15/06/08 16:14:16 INFO spark.SecurityManager: Changing modify acls to: root 15/06/08 16:14:16 INFO spark.SecurityManager: SecurityManager: authentication disabled; ui acls disabled; users with view permissions: Set(root); users with modify permissions: Set(root) 15/06/08 16:14:16 INFO remote.RemoteActorRefProvider$RemotingTerminator: Shutting down remote daemon. 15/06/08 16:14:16 INFO remote.RemoteActorRefProvider$RemotingTerminator: Remote daemon shut down; proceeding with flushing remote transports. 15/06/08 16:14:16 INFO slf4j.Slf4jLogger: Slf4jLogger started 15/06/08 16:14:16 INFO Remoting: Starting remoting 15/06/08 16:14:17 INFO remote.RemoteActorRefProvider$RemotingTerminator: Remoting shut down. 15/06/08 16:14:17 INFO Remoting: Remoting started; listening on addresses :[akka.tcp://sparkExecutor@slave5:49169] 15/06/08 16:14:17 INFO util.Utils: Successfully started service 'sparkExecutor' on port 49169. 15/06/08 16:14:17 INFO util.AkkaUtils: Connecting to MapOutputTracker: akka.tcp://sparkDriver@slave5:58630/user/MapOutputTracker 15/06/08 16:14:17 INFO util.AkkaUtils: Connecting to BlockManagerMaster: akka.tcp://sparkDriver@slave5:58630/user/BlockManagerMaster 15/06/08 16:14:17 INFO storage.DiskBlockManager: Created local directory at /tmp/spark-548b4618-4aba-4b63-9467-381fbfea8d5b/spark-83737dd6-46b0-47ee-82a5-5afee46bdbf5/spark-0fe9d8ba-2910-44a2-bf4f-80d179f5d58b/blockmgr-b4884e7a-2527-447a-9fc5-1823d923c2f1 15/06/08 16:14:17 INFO storage.MemoryStore: MemoryStore started with capacity 353.3 MB 15/06/08 16:14:17 INFO util.AkkaUtils: Connecting to OutputCommitCoordinator: akka.tcp://sparkDriver@slave5:58630/user/OutputCommitCoordinator 15/06/08 16:14:17 INFO executor.CoarseGrainedExecutorBackend: Connecting to driver: akka.tcp://sparkDriver@slave5:58630/user/CoarseGrainedScheduler 15/06/08 16:14:18 INFO worker.WorkerWatcher: Connecting to worker akka.tcp://sparkWorker@slave5:48926/user/Worker 15/06/08 16:14:18 INFO executor.CoarseGrainedExecutorBackend: Successfully registered with driver 15/06/08 16:14:18 INFO executor.Executor: Starting executor ID 0 on host slave5 15/06/08 16:14:18 INFO worker.WorkerWatcher: Successfully connected to akka.tcp://sparkWorker@slave5:48926/user/Worker 15/06/08 16:14:21 WARN internal.ThreadLocalRandom: Failed to generate a seed from SecureRandom within 3 seconds. Not enough entrophy? 15/06/08 16:14:21 INFO netty.NettyBlockTransferService: Server created on 53449 15/06/08 16:14:21 INFO storage.BlockManagerMaster: Trying to register BlockManager 15/06/08 16:14:21 INFO storage.BlockManagerMaster: Registered BlockManager 15/06/08 16:14:21 INFO util.AkkaUtils: Connecting to HeartbeatReceiver: akka.tcp://sparkDriver@slave5:58630/user/HeartbeatReceiver 15/06/08 16:14:21 INFO executor.CoarseGrainedExecutorBackend: Got assigned task 0 15/06/08 16:14:21 INFO executor.Executor: Running task 0.0 in stage 0.0 (TID 0) 15/06/08 16:14:21 INFO executor.Executor: Fetching http://192.168.100.11:50648/jars/ShellCompare.jar with timestamp 1433751228699 15/06/08 16:14:21 INFO util.Utils: Fetching http://192.168.100.11:50648/jars/ShellCompare.jar to /tmp/spark-548b4618-4aba-4b63-9467-381fbfea8d5b/spark-83737dd6-46b0-47ee-82a5-5afee46bdbf5/spark-99aba156-5803-41b8-9df1-3e36305f43c3/fetchFileTemp8512004298922421624.tmp 15/06/08 16:14:21 INFO util.Utils: Copying /tmp/spark-548b4618-4aba-4b63-9467-381fbfea8d5b/spark-83737dd6-46b0-47ee-82a5-5afee46bdbf5/spark-99aba156-5803-41b8-9df1-3e36305f43c3/-8058314591433751228699_cache to /usr/lib/spark/work/app-20150608161350-0001/0/./ShellCompare.jar 15/06/08 16:14:22 INFO executor.Executor: Adding file:/usr/lib/spark/work/app-20150608161350-0001/0/./ShellCompare.jar to class loader 15/06/08 16:14:22 INFO broadcast.TorrentBroadcast: Started reading broadcast variable 0 15/06/08 16:14:23 INFO storage.MemoryStore: ensureFreeSpace(1561) called with curMem=0, maxMem=370503843 15/06/08 16:14:23 INFO storage.MemoryStore: Block broadcast_0_piece0 stored as bytes in memory (estimated size 1561.0 B, free 353.3 MB) 15/06/08 16:14:23 INFO storage.BlockManagerMaster: Updated info of block broadcast_0_piece0 15/06/08 16:14:23 INFO broadcast.TorrentBroadcast: Reading broadcast variable 0 took 967 ms 15/06/08 16:14:23 INFO storage.MemoryStore: ensureFreeSpace(2168) called with curMem=1561, maxMem=370503843 15/06/08 16:14:23 INFO storage.MemoryStore: Block broadcast_0 stored as values in memory (estimated size 2.1 KB, free 353.3 MB) 15/06/08 16:14:42 INFO executor.Executor: Finished task 0.0 in stage 0.0 (TID 0). 693 bytes result sent to driver 15/06/08 16:14:42 INFO executor.CoarseGrainedExecutorBackend: Got assigned task 1 15/06/08 16:14:42 INFO executor.Executor: Running task 1.0 in stage 0.0 (TID 1) 15/06/08 16:14:56 INFO executor.Executor: Finished task 1.0 in stage 0.0 (TID 1). 693 bytes result sent to driver 15/06/08 16:14:56 INFO executor.CoarseGrainedExecutorBackend: Driver commanded a shutdown 15/06/08 16:14:56 INFO storage.MemoryStore: MemoryStore cleared 15/06/08 16:14:56 INFO storage.BlockManager: BlockManager stopped 15/06/08 16:14:56 INFO remote.RemoteActorRefProvider$RemotingTerminator: Shutting down remote daemon. 15/06/08 16:14:56 INFO remote.RemoteActorRefProvider$RemotingTerminator: Remote daemon shut down; proceeding with flushing remote transports. -------------------------------- Thanks&Best regards! 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