Thanks Azuryy Yu Your parallel running tasks of tajo-worker is 10 but heap memory is 3GB. It cause a long JVM pause I recommend following :
tajo-env.sh TAJO_WORKER_HEAPSIZE=3000 or more tajo-site.xml <!-- worker --> <property> <name>tajo.worker.resource.memory-mb</name> <value>3512</value> <!-- 3 tasks + 1 qm task --> </property> <property> <name>tajo.task.memory-slot-mb.default</name> <value>1000</value> <!-- default 512 --> </property> <property> <name>tajo.worker.resource.dfs-dir-aware</name> <value>true</value> </property> <!-- end --> http://tajo.apache.org/docs/0.9.0/configuration/worker_configuration.html -Jinho Best regards 2015-01-16 16:02 GMT+09:00 Azuryy Yu <[email protected]>: > Thanks Kim. > > The following is my tajo-env and tajo-site > > *tajo-env.sh:* > export HADOOP_HOME=/usr/local/hadoop > export JAVA_HOME=/usr/local/java > _TAJO_OPTS="-server -verbose:gc > -XX:+PrintGCDateStamps > -XX:+PrintGCDetails > -XX:+UseGCLogFileRotation > -XX:NumberOfGCLogFiles=9 > -XX:GCLogFileSize=256m > -XX:+DisableExplicitGC > -XX:+UseCompressedOops > -XX:SoftRefLRUPolicyMSPerMB=0 > -XX:+UseFastAccessorMethods > -XX:+UseParNewGC > -XX:+UseConcMarkSweepGC > -XX:+CMSParallelRemarkEnabled > -XX:CMSInitiatingOccupancyFraction=70 > -XX:+UseCMSCompactAtFullCollection > -XX:CMSFullGCsBeforeCompaction=0 > -XX:+CMSClassUnloadingEnabled > -XX:CMSMaxAbortablePrecleanTime=300 > -XX:+CMSScavengeBeforeRemark > -XX:PermSize=160m > -XX:GCTimeRatio=19 > -XX:SurvivorRatio=2 > -XX:MaxTenuringThreshold=60" > _TAJO_MASTER_OPTS="$_TAJO_OPTS -Xmx512m -Xms512m -Xmn256m" > _TAJO_WORKER_OPTS="$_TAJO_OPTS -Xmx3g -Xms3g -Xmn1g" > _TAJO_QUERYMASTER_OPTS="$_TAJO_OPTS -Xmx512m -Xms512m -Xmn256m" > export TAJO_OPTS=$_TAJO_OPTS > export TAJO_MASTER_OPTS=$_TAJO_MASTER_OPTS > export TAJO_WORKER_OPTS=$_TAJO_WORKER_OPTS > export TAJO_QUERYMASTER_OPTS=$_TAJO_QUERYMASTER_OPTS > export TAJO_LOG_DIR=${TAJO_HOME}/logs > export TAJO_PID_DIR=${TAJO_HOME}/pids > export TAJO_WORKER_STANDBY_MODE=true > > *tajo-site.xml:* > > <configuration> > <property> > <name>tajo.rootdir</name> > <value>hdfs://test-cluster/tajo</value> > </property> > <property> > <name>tajo.master.umbilical-rpc.address</name> > <value>10-0-86-51:26001</value> > </property> > <property> > <name>tajo.master.client-rpc.address</name> > <value>10-0-86-51:26002</value> > </property> > <property> > <name>tajo.resource-tracker.rpc.address</name> > <value>10-0-86-51:26003</value> > </property> > <property> > <name>tajo.catalog.client-rpc.address</name> > <value>10-0-86-51:26005</value> > </property> > <property> > <name>tajo.worker.tmpdir.locations</name> > <value>/test/tajo1,/test/tajo2,/test/tajo3</value> > </property> > <!-- worker --> > <property> > <name>tajo.worker.resource.tajo.worker.resource.cpu-cores</name> > <value>4</value> > </property> > <property> > <name>tajo.worker.resource.memory-mb</name> > <value>5120</value> > </property> > <property> > <name>tajo.worker.resource.dfs-dir-aware</name> > <value>true</value> > </property> > <property> > <name>tajo.worker.resource.dedicated</name> > <value>true</value> > </property> > <property> > <name>tajo.worker.resource.dedicated-memory-ratio</name> > <value>0.6</value> > </property> > </configuration> > > On Fri, Jan 16, 2015 at 2:50 PM, Jinho Kim <[email protected]> wrote: > > > Hello Azuyy yu > > > > I left some comments. > > > > -Jinho > > Best regards > > > > 2015-01-16 14:37 GMT+09:00 Azuryy Yu <[email protected]>: > > > > > Hi, > > > > > > I tested Tajo before half a year, then not focus on Tajo because some > > other > > > works. > > > > > > then I setup a small dev Tajo cluster this week.(six nodes, VM) based > on > > > Hadoop-2.6.0. > > > > > > so my questions is: > > > > > > 1) From I know half a yea ago, Tajo is work on Yarn, using Yarn > scheduler > > > to manage job resources. but now I found it doesn't rely on Yarn, > > because > > > I only start HDFS daemons, no yarn daemons. so Tajo has his own job > > > sheduler ? > > > > > > > > Now, tajo does using own task scheduler. and You can start tajo without > > Yarn daemons > > Please refer to http://tajo.apache.org/docs/0.9.0/configuration.html > > > > > > > > > > 2) Does that we need to put the file replications on every nodes on > Tajo > > > cluster? > > > > > > > No, tajo does not need more replication. if you set more replication, > data > > locality can be increased > > > > such as I have a six nodes Tajo cluster, then should I set HDFS block > > > replication to six? because: > > > > > > I noticed when I run Tajo query, some nodes are busy, but some is free. > > > because the file's blocks are only located on these nodes. non others. > > > > > > > > In my opinion, you need to run balancer > > > > > http://hadoop.apache.org/docs/r2.6.0/hadoop-project-dist/hadoop-hdfs/HDFSCommands.html#balancer > > > > > > 3)the test data set is 4 million rows. nearly several GB. but it's very > > > slow when I runing: select count(distinct ID) from ****; > > > Any possible problems here? > > > > > > > Could you share tajo-env.sh, tajo-site.xml ? > > > > > > > > > > > > > Thanks > > > > > >
