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From "David Alves (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (CASSANDRA-3564) flush before shutdown so restart is faster
Date Tue, 24 Jul 2012 19:53:35 GMT

    [ https://issues.apache.org/jira/browse/CASSANDRA-3564?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13421713#comment-13421713
] 

David Alves commented on CASSANDRA-3564:
----------------------------------------

You mean send SIGINT/SIGTERM before waiting and SIGKILL after right?

SIGINT/SIGTERM don't do a global flush because the shutdown hooks still only flush tables
that have durable_writes to false, so either we used nodetool to explicitly call flushAllTables
of do in cassandra daemon which is being called from jsvc anyway.




                
> flush before shutdown so restart is faster
> ------------------------------------------
>
>                 Key: CASSANDRA-3564
>                 URL: https://issues.apache.org/jira/browse/CASSANDRA-3564
>             Project: Cassandra
>          Issue Type: New Feature
>          Components: Packaging
>            Reporter: Jonathan Ellis
>            Assignee: David Alves
>            Priority: Minor
>             Fix For: 1.2
>
>         Attachments: 3564.patch, 3564.patch
>
>
> Cassandra handles flush in its shutdown hook for durable_writes=false CFs (otherwise
we're *guaranteed* to lose data) but leaves it up to the operator otherwise.  I'd rather leave
it that way to offer these semantics:
> - cassandra stop = shutdown nicely [explicit flush, then kill -int]
> - kill -INT = shutdown faster but don't lose any updates [current behavior]
> - kill -KILL = lose most recent writes unless durable_writes=true and batch commits are
on [also current behavior]
> But if it's not reasonable to use nodetool from the init script then I guess we can just
make the shutdown hook flush everything.

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