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https://issues.apache.org/jira/browse/GIRAPH-514?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Claudio Martella updated GIRAPH-514:
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    Attachment: GIRAPH-514.diff

uses different disks for each store. shuffles the directories to distribute 
disk usage when using multiple workers per machine.
                
> 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
>         Attachments: GIRAPH-514.diff
>
>
> 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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