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From "Maja Kabiljo (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (GIRAPH-514) DiskBackedMessageStores should take advantage of machines with multiple disks
Date Thu, 14 Feb 2013 23:07:13 GMT

    [ https://issues.apache.org/jira/browse/GIRAPH-514?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13578791#comment-13578791
] 

Maja Kabiljo commented on GIRAPH-514:
-------------------------------------

There are no messages in superstep -1?
Using such low number of in-memory messages will definitely be very slow when reading messages
back, since you'll have a lot of seeks.
                
> DiskBackedMessageStores should take advantage of machines with multiple disks
> -----------------------------------------------------------------------------
>
>                 Key: GIRAPH-514
>                 URL: https://issues.apache.org/jira/browse/GIRAPH-514
>             Project: Giraph
>          Issue Type: Improvement
>            Reporter: Claudio Martella
>            Assignee: Claudio Martella
>            Priority: Minor
>
> We are storing messages on a per partition on disk. We can store each file (partition
data) on a different disk, if available, to take advantage of full IO bandwith, when using
multiple compute threads or workers per machine.

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