The current setting is: <name>mapred.child.java.opts</name> <value>-Xmx6144m -XX:+UseParallelGC -mx1024m -XX:MaxHeapFreeRatio=10 -XX:MinHeapFreeRatio=10</value>
Is 6144MB enough( for each task tracker)? I.e: I have 39 nodes to process the 8*2GB input files. Best Regards, Suijian 2014-03-07 9:21 GMT-06:00 Claudio Martella <claudio.marte...@gmail.com>: > this setting won't be used by Giraph (or by any mapreduce application), > but by the hadoop infrastructure itself. > you should use mapred.child.java.opts instead. > > > On Fri, Mar 7, 2014 at 4:19 PM, Suijian Zhou <suijian.z...@gmail.com>wrote: > >> Hi, Claudio, >> I have set the following when ran the program: >> export HADOOP_DATANODE_OPTS="-Xmx10g" >> and >> export HADOOP_HEAPSIZE=30000 >> >> in hadoop-env.sh and restarted hadoop. >> >> Best Regards, >> Suijian >> >> >> >> 2014-03-06 17:29 GMT-06:00 Claudio Martella <claudio.marte...@gmail.com>: >> >> did you actually increase the heap? >>> >>> >>> On Thu, Mar 6, 2014 at 11:43 PM, Suijian Zhou <suijian.z...@gmail.com>wrote: >>> >>>> Hi, >>>> I tried to process only 2 of the input files, i.e, 2GB + 2GB input, >>>> the program finished successfully in 6 minutes. But as I have 39 nodes, >>>> they should be enough to load and process the 8*2GB=16GB size graph? Can >>>> somebody help to give some hints( Will all the nodes participate in graph >>>> loading from HDFS or only master node load the graph?)? Thanks! >>>> >>>> Best Regards, >>>> Suijian >>>> >>>> >>>> >>>> 2014-03-06 16:24 GMT-06:00 Suijian Zhou <suijian.z...@gmail.com>: >>>> >>>> Hi, Experts, >>>>> I'm trying to process a graph by pagerank in giraph, but the program >>>>> always stucks there. >>>>> There are 8 input files, each one is with size ~2GB and all copied >>>>> onto HDFS. I use 39 nodes and each node has 16GB Mem and 8 cores. It keeps >>>>> printing the same info(as the following) on the screen after 2 hours, >>>>> looks >>>>> no progress at all. What are the possible reasons? Testing small example >>>>> files run without problems. Thanks! >>>>> >>>>> 14/03/06 16:17:42 INFO job.JobProgressTracker: Data from 39 workers - >>>>> Compute superstep 0: 5854829 out of 49200000 vertices computed; 181 out of >>>>> 1521 partitions computed >>>>> 14/03/06 16:17:47 INFO job.JobProgressTracker: Data from 39 workers - >>>>> Compute superstep 0: 5854829 out of 49200000 vertices computed; 181 out of >>>>> 1521 partitions computed >>>>> >>>>> Best Regards, >>>>> Suijian >>>>> >>>>> >>>> >>> >>> >>> -- >>> Claudio Martella >>> >>> >> >> > > > -- > Claudio Martella > >
