[jira] [Updated] (ZOOKEEPER-1792) Observers don't need to keep an in-memory copy of last commited proposals

["Raul Gutierrez Segales (JIRA)" <ji...@apache.org>]

     [ https://issues.apache.org/jira/browse/ZOOKEEPER-1792?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Raul Gutierrez Segales updated ZOOKEEPER-1792:
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    Summary: Observers don't need to keep an in-memory copy of last commited proposals   (was: Observers don't need to keep the an in-memory copy of last commited proposals )

> Observers don't need to keep an in-memory copy of last commited proposals 
> --------------------------------------------------------------------------
>
>                 Key: ZOOKEEPER-1792
>                 URL: https://issues.apache.org/jira/browse/ZOOKEEPER-1792
>             Project: ZooKeeper
>          Issue Type: Improvement
>            Reporter: Raul Gutierrez Segales
>            Priority: Minor
>
> In FinalRequestProcessor.java#processRequest we have:
> {noformat}
>      if (request.isQuorum()) {
>                 zks.getZKDatabase().addCommittedProposal(request);
>      }
> {noformat}
> but this is only useful to the leader since committed proposals are only used from LearnerHandler to sync up followers. I presume followers do need it as they might become a leader at any point. But observers have no need for them, so we could probably special case this for them and optimize the path for them.



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