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From "Edward J. Yoon (JIRA)" <j...@apache.org>
Subject [jira] [Updated] (HAMA-567) BSPPeer should provide means for chaining supersteps to share data among them.
Date Wed, 31 Oct 2012 04:57:12 GMT

     [ https://issues.apache.org/jira/browse/HAMA-567?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]

Edward J. Yoon updated HAMA-567:
--------------------------------

    Fix Version/s:     (was: 0.6.0)
                   0.7.0
    
> BSPPeer should provide means for chaining supersteps to share data among them.
> ------------------------------------------------------------------------------
>
>                 Key: HAMA-567
>                 URL: https://issues.apache.org/jira/browse/HAMA-567
>             Project: Hama
>          Issue Type: Improvement
>          Components: bsp core
>    Affects Versions: 0.6.0
>            Reporter: Suraj Menon
>             Fix For: 0.7.0
>
>         Attachments: Mapper.java
>
>
> In most scenarios, a superstep would need certain values or objects that were computed
in the previous superstep. When using the chaining Superstep design to implement BSP algorithms,
this gets a little ugly/difficult to implement. BSPPeer should provide means (preferably a
map<String,Object>) so that the next Superstep can ask for the values in previous superstep
using String token to query the map. Also, this map could be checkpointed periodically in
the background so that we can completely recover the state of a task after failure. The BSPPeer
object should have a dedicated get and set function for updating values in the peer.

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