giraph-dev mailing list archives

Site index · List index
Message view « Date » · « Thread »
Top « Date » · « Thread »
From "Claudio Martella (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (GIRAPH-249) Move part of the graph out-of-core when memory is low
Date Wed, 15 Aug 2012 16:57:38 GMT

    [ https://issues.apache.org/jira/browse/GIRAPH-249?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13435293#comment-13435293
] 

Claudio Martella commented on GIRAPH-249:
-----------------------------------------

Hi Alessandro,

this is very interesting, great work! I have the feeling that the impact of out-of-core graph
is going to be different depending on the type of access pattern to the graph (in PR all the
graph is always active while on SSSP you might scan a partition to discover that all the vertices
are inactive). I'd be curious to see the benchmarks replicated also on SSSP.
                
> Move part of the graph out-of-core when memory is low
> -----------------------------------------------------
>
>                 Key: GIRAPH-249
>                 URL: https://issues.apache.org/jira/browse/GIRAPH-249
>             Project: Giraph
>          Issue Type: Improvement
>            Reporter: Alessandro Presta
>            Assignee: Alessandro Presta
>         Attachments: GIRAPH-249.patch, GIRAPH-249.patch, GIRAPH-249.patch, GIRAPH-249.patch,
GIRAPH-249.patch, GIRAPH-249.patch
>
>
> There has been some talk about Giraph's scaling limitations due to keeping the whole
graph and messages in RAM.
> We need to investigate methods to fall back to disk when running out of memory, while
gracefully degrading performance.
> This issue is for graph storage. Messages should probably be a separate issue, although
the interplay between the two is crucial.
> We should also discuss what are our primary goals here: completing a job (albeit slowly)
instead of failing when the graph is too big, while still encouraging memory optimizations
and high-memory clusters; or restructuring Giraph to be as efficient as possible in disk mode,
making it almost a standard way of operating.

--
This message is automatically generated by JIRA.
If you think it was sent incorrectly, please contact your JIRA administrators: https://issues.apache.org/jira/secure/ContactAdministrators!default.jspa
For more information on JIRA, see: http://www.atlassian.com/software/jira

        

Mime
View raw message