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From "Julia (JIRA)" <j...@apache.org>
Subject [jira] [Comment Edited] (REEF-1404) IMRU task state Maintenance and Preservation in Evaluator for fault tolerant
Date Thu, 22 Sep 2016 19:22:20 GMT

    [ https://issues.apache.org/jira/browse/REEF-1404?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15514227#comment-15514227
] 

Julia edited comment on REEF-1404 at 9/22/16 7:21 PM:
------------------------------------------------------

Mariia Mykhailova, thanks for the summary. After bunch of inline/offline discussions,  I would
prefer option 2 at the first phase for memory state management. 

For phase 2 state persistent, 
Client can inject IFileSystem in their implementation of IStateManager and implement their
details. Option 2 would still work. 
If we want IMRU task host to manage the persistent, we can still inject the same IStateManager
instance in IMRU task host level 

I would propose to name the empty interface as ITaskState instead of IStateMangaer. Is that
better to fit the purpose? 


was (Author: juliaw):
Mariia Mykhailova, thanks for the summary. After bunch of inline/offline discussions,  I would
prefer option 2 at the first phase for memory state management. 

For phase 2 state persistent, 
Client can inject IFileSystem and implement their details. Option 2 would still work. 
If we want IMRU task host to manage the persistent, we can still inject the same state instance
in IMRU task host level 

I would propose to name the empty interface as ITaskState instead of IStateMangaer. Is that
better to fit the purpose? 

> IMRU task state Maintenance and Preservation in Evaluator for fault tolerant
> ----------------------------------------------------------------------------
>
>                 Key: REEF-1404
>                 URL: https://issues.apache.org/jira/browse/REEF-1404
>             Project: REEF
>          Issue Type: Task
>            Reporter: Julia
>              Labels: FT
>
> IMRU task should be able to 
> * Maintenance and preservation the state
> * When restart, able to recover from the previous sate



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