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Posted to issues@bookkeeper.apache.org by GitBox <gi...@apache.org> on 2018/12/13 07:10:48 UTC

[GitHub] merlimat commented on issue #1808: Allow to configure sticky reads

merlimat commented on issue #1808: Allow to configure sticky reads
URL: https://github.com/apache/bookkeeper/pull/1808#issuecomment-446865316
 
 
   @eolivelli @jvrao  @dlg99 @sijie @ivankelly I have updated the PR with the following: 
   
    * When enabled, `LedgerHandle` has the notion of a sticky bookie
    * The sticky bookie is initially selected at random (this helps when there are multiple readers that are independently reading different portions of the ledger concurrently).
    * If there are read failures, the ledger handle will pick a new sticky bookie, to avoid read impact.
    * Added tests
   
   I haven't addressed the case where E > W because I believe that the benefit in that scenario are not that big, compared to the case where E=W. It would be easy to add that afterward in any case.
   
   Please take a look.

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