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Posted to dev@bookkeeper.apache.org by "Uma Maheswara Rao G (JIRA)" <ji...@apache.org> on 2013/01/04 12:26:15 UTC

[jira] [Commented] (BOOKKEEPER-237) Automatic recovery of under-replicated ledgers and its entries

    [ https://issues.apache.org/jira/browse/BOOKKEEPER-237?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13543808#comment-13543808 ] 

Uma Maheswara Rao G commented on BOOKKEEPER-237:
------------------------------------------------

Can we close this JIRA as implemented? All sub tasks are in closed state now!
                
> Automatic recovery of under-replicated ledgers and its entries
> --------------------------------------------------------------
>
>                 Key: BOOKKEEPER-237
>                 URL: https://issues.apache.org/jira/browse/BOOKKEEPER-237
>             Project: Bookkeeper
>          Issue Type: New Feature
>          Components: bookkeeper-auto-recovery
>    Affects Versions: 4.0.0
>            Reporter: Rakesh R
>            Assignee: Rakesh R
>         Attachments: Auto Recovery and Bookie sync-ups.pdf, Auto Recovery Detection - distributed chain approach.doc, BookKeeper-Auto-Recovery-Updated-To-Latest.pdf
>
>
> As per the current design of BookKeeper, if one of the BookKeeper server dies, there is no automatic mechanism to identify and recover the under replicated ledgers and its corresponding entries. This would lead to losing the successfully written entries, which will be a critical problem in sensitive systems. This document is trying to describe few proposals to overcome these limitations. 

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