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From "Ilya Pronin (JIRA)" <j...@apache.org>
Subject [jira] [Comment Edited] (MESOS-7973) Non-leading VOTING replica catch-up
Date Tue, 03 Oct 2017 23:20:00 GMT

    [ 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:
--------------------------------------------------------------

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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