Sorry, I assumed Linux. James
Sent from my mobile. Please excuse the typos. On 2011-05-02, at 8:15 AM, Richard Nadeau <[email protected]> wrote: > Are you running under cygwin on your data nodes as well? That is certain to > cause performance problems. As James suggested, swapping to disk is going to > be a killer, running on Windows with Celeron processors only compounds the > problem. The Celeron processor is also sub-optimal for CPU intensive tasks > > Rick > > On Apr 28, 2011 9:22 AM, "baran cakici" <[email protected]> wrote: >> Hi Everyone, >> >> I have a Cluster with one Master(JobTracker and NameNode - Intel Core2Duo > 2 >> GB Ram) and four Slaves(Datanode and Tasktracker - Celeron 2 GB Ram). My >> Inputdata are between 2GB-10GB and I read Inputdata in MapReduce line by >> line. Now, I try to accelerate my System(Benchmark), but I'm not sure, if > my >> Configuration is correctly. Can you please just look, if it is ok? >> >> -mapred-site.xml >> >> <property> >> <name>mapred.job.tracker</name> >> <value>apple:9001</value> >> </property> >> >> <property> >> <name>mapred.child.java.opts</name> >> <value>-Xmx512m -server</value> >> </property> >> >> <property> >> <name>mapred.job.tracker.handler.count</name> >> <value>2</value> >> </property> >> >> <property> >> <name>mapred.local.dir</name> >> > <value>/cygwin/usr/local/hadoop-datastore/hadoop-Baran/mapred/local</value> >> </property> >> >> <property> >> <name>mapred.map.tasks</name> >> <value>1</value> >> </property> >> >> <property> >> <name>mapred.reduce.tasks</name> >> <value>4</value> >> </property> >> >> <property> >> <name>mapred.submit.replication</name> >> <value>2</value> >> </property> >> >> <property> >> <name>mapred.system.dir</name> >> > <value>/cygwin/usr/local/hadoop-datastore/hadoop-Baran/mapred/system</value> >> </property> >> >> <property> >> <name>mapred.tasktracker.indexcache.mb</name> >> <value>10</value> >> </property> >> >> <property> >> <name>mapred.tasktracker.map.tasks.maximum</name> >> <value>1</value> >> </property> >> >> <property> >> <name>mapred.tasktracker.reduce.tasks.maximum</name> >> <value>4</value> >> </property> >> >> <property> >> <name>mapred.temp.dir</name> >> <value>/cygwin/usr/local/hadoop-datastore/hadoop-Baran/mapred/temp</value> >> </property> >> >> <property> >> <name>webinterface.private.actions</name> >> <value>true</value> >> </property> >> >> <property> >> <name>mapred.reduce.slowstart.completed.maps</name> >> <value>0.01</value> >> </property> >> >> -hdfs-site.xml >> >> <property> >> <name>dfs.block.size</name> >> <value>268435456</value> >> </property> >> PS: I extended dfs.block.size, because I won 50% better performance with >> this change. >> >> I am waiting for your comments... >> >> Regards, >> >> Baran
