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From Matthew Saltz <sal...@gmail.com>
Subject Re: Problem processing large graph
Date Thu, 11 Sep 2014 11:49:56 GMT
Hi Tripti,

How many machines are you running on? The ideal configuration would be one
worker per machine and one separate machine for the master. If you're using
more mappers than machines then you're using more resources than necessary,
and fixing that could help.

Best,
Matthew
El 11/09/2014 13:39, "Tripti Singh" <tripti@yahoo-inc.com> escribió:

>  Hi Avery,
> Thanks for your reply.
> I did adjust the heap and container size to a higher value(3072MB and
> 4096MB respectively) and I am not running the out of core option as well.
> I am intermittently able to run the job with 200 mappers. At other times,
> I can run part of the data while the other part gets stalled.
> FYI, I am using netty without authentication.
> One thing that I have noticed, however, is that it mostly runs
> successfully when the queue is running almost idle or is comparatively
> free. On most instances when the queue is running more tasks or is
> over-allocated, my job stalls even when the required number of containers
> are allocated. Looking at the logs, I mostly find it stalling at Superstep
> 0 or 1 after finishing Superstep –1. Or sometimes, even at –1.
> Could there be some shared resources in the queue which are not enough for
> the job while the job runs on a loaded queue and can I configure some other
> value to make it run?
>
>  Tripti Singh
> Tech Yahoo, Software Sys Dev Eng
> P: +91 080.30516197  M: +91 9611907150
> Yahoo Software Development India Pvt. Ltd Torrey Pines Bangalore 560 071
>
>
>   From: Avery Ching <aching@apache.org>
> Reply-To: "user@giraph.apache.org" <user@giraph.apache.org>
> Date: Wednesday, September 3, 2014 at 10:53 PM
> To: "user@giraph.apache.org" <user@giraph.apache.org>
> Subject: Re: Problem processing large graph
>
>   Hi Tripti,
>
> Is there a chance you can use higher memory machines so you don't run out
> of core?  We do it this way at Facebook.  We've haven't tested the
> out-of-core option.
>
> Avery
>
> On 8/31/14, 2:34 PM, Tripti Singh wrote:
>
>  Hi,
>  I am able to successfully build hadoop_yarn profile for running Giraph
> 1.1.
>  I am also able to test run Connected Components on a small dataset.
>  However, I am seeing 2 issues while running on a bigger dataset with 400
> mappers:
>
>    1. I am unable to use out of Core Graph option. It errors out saying
>    that it cannot read INIT partition. (Sorry I don’t have the log currently
>    but I will share after I run that again).
>    I am expecting that if the out of Core option is fixed, I should be
>    able to run the workflow with less mappers.
>    2. In order to run the workflow anyhow, I removed the out of Core
>    option and adjusted the heap size. This also runs with smaller dataset but
>    fails with huge dataset.
>    Worker logs are mostly empty. Non-empty logs end like this:
>
>
>
>
>
>
>
>
>
>
> *mapred.task.partition is deprecated. Instead, use
>    mapreduce.task.partition [STATUS: task-374] setup: Beginning worker setup.
>    setup: Log level remains at info [STATUS: task-374] setup: Initializing
>    Zookeeper services. mapred.job.id <http://mapred.job.id> is deprecated.
>    Instead, use mapreduce.job.id <http://mapreduce.job.id> job.local.dir is
>    deprecated. Instead, use mapreduce.job.local.dir [STATUS: task-374] setup:
>    Setting up Zookeeper manager. createCandidateStamp: Made the directory
>    _bsp/_defaultZkManagerDir/giraph_yarn_application_1407992474095_708614
>    createCandidateStamp: Made the directory
>    _bsp/_defaultZkManagerDir/giraph_yarn_application_1407992474095_708614/_zkServer
>    createCandidateStamp: Creating my filestamp
>    _bsp/_defaultZkManagerDir/giraph_yarn_application_1407992474095_708614/_task/gsta33201.tan.ygrid.yahoo.com
>    <http://gsta33201.tan.ygrid.yahoo.com> 374 getZooKeeperServerList: For task
>    374, got file 'null' (polling period is 3000) *
>
>    Master log has log statements for launching the container, opening
>    proxy and processing event like this:
>
>
> *Opening proxy : gsta31118.tan.ygrid.yahoo.com:8041
>    <http://gsta31118.tan.ygrid.yahoo.com:8041>  Processing Event EventType:
>    QUERY_CONTAINER for Container container_1407992474095_708614_01_000314 ……*
>
> I am not using SASL authentication.
> Any idea what might be wrong?
>
>  Thanks,
> Tripti.
>
>
>
>

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