Re: how to use out of core options

2013-10-18 Thread Jianqiang Ou
Thanks, I just tried another dataset, which could be successfully handled by my cluster within memory. However, exceptions still occurred with the -Dgiraph.useOutOfCoreGraph=true option, but it works fine with only -Dgiraph.useOutOfCoreMessages=true option, so do you still think it is the dir

Re: Master always fails on dataset

2013-10-18 Thread Simon McGloin
Thanks Claudio. Yes the machines are homogenous. Unfortunately I don't have ganglia installed. You were right it is a memory issue. I've reduced the number of partitions down to 1 with -Dgiraph.maxPartitionsInMemory=1 and now my jobs are failing due to running out of diskspace on HDFS. Each HDFS

RE: Master always fails on dataset

2013-10-18 Thread Tunvall, Fredrik
Please disregard - Outlook sent it to the wrong address. Sorry. - F From: Tunvall, Fredrik [mailto:fredrik.tunv...@ovum.com] Sent: Friday, October 18, 2013 12:25 PM To: user@giraph.apache.org Subject: RE: Master always fails on dataset I will reach out right now From: Simon McGloin

Re: How to specify parameters in order to run giraph job in parallel

2013-10-18 Thread YAN Da
Dear Claudio Martella, According to https://reviews.apache.org/r/7990/diff/?page=2, Giraph currently organize vertices as byte streams, probabily pages. In the url, This also significantly reduces GC time, as there are less objects to GC. Why there's also there? I mean, is reducing GC time the

Re: How to specify parameters in order to run giraph job in parallel

2013-10-18 Thread Sebastian Schelter
Da, Holding objects in serialized form as bytes in byte arrays consumes much less memory than holding them as Java objects (which have a huge overhead), I think that is the other main reason for serialization. --sebastian On 18.10.2013 19:28, YAN Da wrote: Dear Claudio Martella, According

Re: knowing about the vertex id of the sender of the message.

2013-10-18 Thread Haowei Liu
Sorry to be off the topic a bit. I made my own message structure but was wondering if the received messages are sorted based on sender id? I am not able to verify since the call Log.debug() doesn't seem to print out anything. Thanks, Haowei On Thu, Oct 17, 2013 at 9:31 AM, Sebastian Schelter