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Posted to commits@cassandra.apache.org by "Stefan Miklosovic (Jira)" <ji...@apache.org> on 2021/08/18 07:17:00 UTC
[jira] [Comment Edited] (CASSANDRA-14309) Make hint window
persistent across restarts
[ https://issues.apache.org/jira/browse/CASSANDRA-14309?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17400853#comment-17400853 ]
Stefan Miklosovic edited comment on CASSANDRA-14309 at 8/18/21, 7:16 AM:
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branch: https://github.com/apache/cassandra/pull/1152
dtest: https://github.com/apache/cassandra-dtest/pull/153
CI build with dtest: https://ci-cassandra.apache.org/view/patches/job/Cassandra-devbranch/1034/
[~aleksey] [~brandon.williams] would you take a look please?
was (Author: stefan.miklosovic):
branch: https://github.com/apache/cassandra/pull/1152
dtest: https://github.com/apache/cassandra-dtest/pull/153
CI build with dtest: https://ci-cassandra.apache.org/view/patches/job/Cassandra-devbranch/1034/
[~aleksey] would you take a look please?
> Make hint window persistent across restarts
> -------------------------------------------
>
> Key: CASSANDRA-14309
> URL: https://issues.apache.org/jira/browse/CASSANDRA-14309
> Project: Cassandra
> Issue Type: Improvement
> Components: Consistency/Hints
> Reporter: Kurt Greaves
> Assignee: Stefan Miklosovic
> Priority: Low
> Labels: 4.0-feature-freeze-review-requested
> Fix For: 4.x
>
>
> The current hint system stores a window of hints as defined by {{max_hint_window_in_ms}}, however this window is not persistent across restarts.
> Examples (cluster with RF=3 and 3 nodes, A, B, and C):
> # A goes down
> # X ms of hints are stored for A on B and C
> # A is restarted
> # A goes down again without hints replaying from B and C
> # B and C will store up to another {{max_hint_window_in_ms}} of hints for A
>
> # A goes down
> # X ms of hints are stored for A on B and C
> # B is restarted
> # B will store up to another {{max_hint_window_in_ms}} of hints for A
>
> Note that in both these scenarios they can continue forever. If A or B keeps getting restarted hints will continue to pile up.
>
> Idea of this ticket is to stop this behaviour from happening and only ever store up to {{max_hint_window_in_ms}} of hints for a particular node.
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