Sorry Sandy, The command is just for reference but I can confirm that there are 4 executors and a driver as shown in the spark UI page.
Each of these machines is a 8 core box with ~15G of ram. On Mon, Dec 29, 2014 at 11:23 PM, Sandy Ryza <sandy.r...@cloudera.com> wrote: > Hi Mukesh, > > Based on your spark-submit command, it looks like you're only running with > 2 executors on YARN. Also, how many cores does each machine have? > > -Sandy > > On Mon, Dec 29, 2014 at 4:36 AM, Mukesh Jha <me.mukesh....@gmail.com> > wrote: > >> Hello Experts, >> I'm bench-marking Spark on YARN ( >> https://spark.apache.org/docs/latest/running-on-yarn.html) vs a >> standalone spark cluster ( >> https://spark.apache.org/docs/latest/spark-standalone.html). >> I have a standalone cluster with 3 executors, and a spark app running on >> yarn with 4 executors as shown below. >> >> The spark job running inside yarn is 10x slower than the one running on >> the standalone cluster (even though the yarn has more number of workers), >> also in both the case all the executors are in the same datacenter so there >> shouldn't be any latency. On YARN each 5sec batch is reading data from >> kafka and processing it in 5sec & on the standalone cluster each 5sec batch >> is getting processed in 0.4sec. >> Also, In YARN mode all the executors are not getting used up evenly as >> vm-13 & vm-14 are running most of the tasks whereas in the standalone mode >> all the executors are running the tasks. >> >> Do I need to set up some configuration to evenly distribute the tasks? >> Also do you have any pointers on the reasons the yarn job is 10x slower >> than the standalone job? >> Any suggestion is greatly appreciated, Thanks in advance. >> >> YARN(5 workers + driver) >> ======================== >> Executor ID Address RDD Blocks Memory Used DU AT FT CT TT TT Input >> ShuffleRead >> ShuffleWrite Thread Dump >> 1 vm-18.cloud.com:51796 0 0.0B/530.3MB 0.0 B 1 0 16 17 634 ms 0.0 B 2047.0 >> B 1710.0 B Thread Dump >> 2 vm-13.cloud.com:57264 0 0.0B/530.3MB 0.0 B 0 0 1427 1427 5.5 m 0.0 B 0.0 >> B 0.0 B Thread Dump >> 3 vm-14.cloud.com:54570 0 0.0B/530.3MB 0.0 B 0 0 1379 1379 5.2 m 0.0 B 1368.0 >> B 2.8 KB Thread Dump >> 4 vm-11.cloud.com:56201 0 0.0B/530.3MB 0.0 B 0 0 10 10 625 ms 0.0 B 1368.0 >> B 1026.0 B Thread Dump >> 5 vm-5.cloud.com:42958 0 0.0B/530.3MB 0.0 B 0 0 22 22 632 ms 0.0 B 1881.0 >> B 2.8 KB Thread Dump >> <driver> vm.cloud.com:51847 0 0.0B/530.0MB 0.0 B 0 0 0 0 0 ms 0.0 B 0.0 >> B 0.0 B Thread Dump >> >> /homext/spark/bin/spark-submit >> --master yarn-cluster --num-executors 2 --driver-memory 512m >> --executor-memory 512m --executor-cores 2 >> --class com.oracle.ci.CmsgK2H /homext/lib/MJ-ci-k2h.jar >> vm.cloud.com:2181/kafka spark-yarn avro 1 5000 >> >> STANDALONE(3 workers + driver) >> ============================== >> Executor ID Address RDD Blocks Memory Used DU AT FT CT TT TT Input >> ShuffleRead >> ShuffleWrite Thread Dump >> 0 vm-71.cloud.com:55912 0 0.0B/265.0MB 0.0 B 0 0 1069 1069 6.0 m 0.0 B 1534.0 >> B 3.0 KB Thread Dump >> 1 vm-72.cloud.com:40897 0 0.0B/265.0MB 0.0 B 0 0 1057 1057 5.9 m 0.0 B 1368.0 >> B 4.0 KB Thread Dump >> 2 vm-73.cloud.com:37621 0 0.0B/265.0MB 0.0 B 1 0 1059 1060 5.9 m 0.0 B 2.0 >> KB 1368.0 B Thread Dump >> <driver> vm.cloud.com:58299 0 0.0B/265.0MB 0.0 B 0 0 0 0 0 ms 0.0 B 0.0 >> B 0.0 B Thread Dump >> >> /homext/spark/bin/spark-submit >> --master spark://chsnmvproc71vm3.usdc2.oraclecloud.com:7077 >> --class com.oracle.ci.CmsgK2H /homext/lib/MJ-ci-k2h.jar >> vm.cloud.com:2181/kafka spark-standalone avro 1 5000 >> >> PS: I did go through the spark website and >> http://www.virdata.com/tuning-spark/, but was out of any luck. >> >> -- >> Cheers, >> Mukesh Jha >> > > -- Thanks & Regards, *Mukesh Jha <me.mukesh....@gmail.com>*
