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Posted to issues@mesos.apache.org by "Ilya Pronin (JIRA)" <ji...@apache.org> on 2017/10/03 23:20:00 UTC
[jira] [Comment Edited] (MESOS-7973) Non-leading VOTING replica
catch-up
[ https://issues.apache.org/jira/browse/MESOS-7973?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16164926#comment-16164926 ]
Ilya Pronin edited comment on MESOS-7973 at 10/3/17 11:19 PM:
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Review requests:
https://reviews.apache.org/r/62283/
https://reviews.apache.org/r/62284/
https://reviews.apache.org/r/62285/
https://reviews.apache.org/r/62760/
https://reviews.apache.org/r/62761/
https://reviews.apache.org/r/62286/
https://reviews.apache.org/r/62287/
https://reviews.apache.org/r/62288/
was (Author: ipronin):
Review requests:
https://reviews.apache.org/r/62283/
https://reviews.apache.org/r/62284/
https://reviews.apache.org/r/62285/
https://reviews.apache.org/r/62286/
https://reviews.apache.org/r/62287/
https://reviews.apache.org/r/62288/
> Non-leading VOTING replica catch-up
> -----------------------------------
>
> Key: MESOS-7973
> URL: https://issues.apache.org/jira/browse/MESOS-7973
> Project: Mesos
> Issue Type: Improvement
> Components: replicated log
> Reporter: Ilya Pronin
> Assignee: Ilya Pronin
>
> Currently it is not possible to perform consistent reads from non-leading replicas due to the fact that if a non-leading replica is partitioned it may miss some log positions and will not make any attempt to “fill” those holes.
> If a non-leading replica could catch-up missing log positions it would be able to serve eventually consistent reads to the framework. This would make it possible to do additional work on non-leading framework replicas (e.g. offload some reading from a leader to standbys or reduce failover time by keeping in-memory storage represented by the log “hot”).
> Design doc: https://docs.google.com/document/d/1dERXJeAsi3Lnq9Akt82JGWK4pKNeJ6k7PTVCpM9ic_8/edit?usp=sharing
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