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https://issues.apache.org/jira/browse/BOOKKEEPER-237?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13270532#comment-13270532
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Ivan Kelly commented on BOOKKEEPER-237:
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{quote}
However, I'm not entirely convinced that we need a new entity in the system.
Perhaps we can have bookie running an accountant thread instead and use a
simpler mechanism.
{quote}
This is what i imagined accountant to be anyhow. Each bookie would run one.
I think we need to break this into sub jiras.
# detection of under replication
# recording of under replication
# rereplicating of under replicated data
If you guys agree, I'll creates separate JIRAs to discuss each.
> 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-client, bookkeeper-server
> Affects Versions: 4.0.0
> Reporter: Rakesh R
> Assignee: Rakesh R
> Attachments: Auto Recovery and Bookie sync-ups.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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