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https://issues.apache.org/jira/browse/BOOKKEEPER-315?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13450517#comment-13450517
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Ivan Kelly commented on BOOKKEEPER-315:
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Currently, when we recover the entries from a bookie, we basically send all the 
read requests to the other bookies at the same time. While this is fine for 
small bookies, I think this could fall down for ledgers with many millions of 
entries. So really, we should only read in batches of limited size.
                
> Ledger entries should be replicated sequentially instead of parallel.
> ---------------------------------------------------------------------
>
>                 Key: BOOKKEEPER-315
>                 URL: https://issues.apache.org/jira/browse/BOOKKEEPER-315
>             Project: Bookkeeper
>          Issue Type: Bug
>          Components: bookkeeper-auto-recovery, bookkeeper-client
>    Affects Versions: 4.2.0
>            Reporter: Uma Maheswara Rao G
>            Assignee: Uma Maheswara Rao G
>
> Currently BookKeeperAdmin will copy the entries parallel.
> This may create more load on the servers. To avoid that, we can refactor the 
> BKAdmin code to copy the entries sequential.

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