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https://issues.apache.org/jira/browse/CASSANDRA-3564?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13421764#comment-13421764
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Brandon Williams commented on CASSANDRA-3564:
---------------------------------------------

bq. I suggest that we add flag that when enabled waits for the full flush for 
all tables and maybe we don't even need the wait period since the user 
explicitely told that he wanted a full flush and should be willing to wait. 
When the flag disabled reverts to the current setting (flush only non-durable 
tables).

That sounds reasonable but I think we should have *some* kind of ceiling (10 
minutes or something) where we kill -9 it, just in case we ever have a bug that 
causes us not to exit (we've had them before), so we don't hang the shutdown of 
the entire machine forever.
                
> 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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