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https://issues.apache.org/jira/browse/HAMA-557?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13419751#comment-13419751
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Thomas Jungblut commented on HAMA-557:
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bq.Most of our services get initialized by ReflectionUtils.newInstance. Until
now we don't have a common service that validates the interaction between each
of these services. Let's look into this once we have such a requirement. I also
feel inits may have different signatures for different services.
Actually we could break down inits to use configuration as parameters. But
let's talk about it when we need this.
bq. Hopefully, you were happy with the way refactored code interacted with each
other. I wanted these to be building blocks for future work.
this is really great code :)
> Implement Checkpointing service in Hama
> ---------------------------------------
>
> Key: HAMA-557
> URL: https://issues.apache.org/jira/browse/HAMA-557
> Project: Hama
> Issue Type: Sub-task
> Components: bsp core
> Affects Versions: 0.6.0
> Reporter: Suraj Menon
> Assignee: Suraj Menon
> Fix For: 0.6.0
>
> Attachments: HAMA-505-557-610-611-v1.patch,
> HAMA-557-ft-framework.patch
>
>
> Implement checkpointing service in Apache Hama. My patches for HAMA-533 and
> HAMA-534 are blocked on this.
> - Checkpointing should be done as messages are either sent or received. I
> prefer while receiving messages, as we can achieve some parallelism with
> asynchronous messages. Please comment if you differ.
> - BSPMaster should hold the checkpoint status for each task. Checkpoint
> status includes superstep count and file information for which checkpointing
> is complete
> - MessageManager should notify Checkpointer of a new message at BSPPeer.
> - Implement/Reuse MessageBundle class as splitClass in BSPPeerImpl for
> recovery in initInput.
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