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From "Aaron Whiteside (JIRA)" <j...@apache.org>
Subject [jira] [Comment Edited] (CASSANDRA-9329) Make CAS retry logic configurable
Date Thu, 07 May 2015 23:44:00 GMT

    [ https://issues.apache.org/jira/browse/CASSANDRA-9329?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14533614#comment-14533614
] 

Aaron Whiteside edited comment on CASSANDRA-9329 at 5/7/15 11:43 PM:
---------------------------------------------------------------------

Can we at least get something into the next 2.x release? 

Perhaps if cas_contention_timeout_in_ms is set to 0, then we never sleep and only try the
condition once?

The configurable alg and timeout can come later.


was (Author: aaronjwhiteside):
Can we at least get something into the next 2.x release? 

Perhaps if cas_contention_timeout_in_ms is set to 0, then we never sleep and only try the
condition once?



> Make CAS retry logic configurable
> ---------------------------------
>
>                 Key: CASSANDRA-9329
>                 URL: https://issues.apache.org/jira/browse/CASSANDRA-9329
>             Project: Cassandra
>          Issue Type: Improvement
>          Components: Core
>            Reporter: Aaron Whiteside
>             Fix For: 3.x
>
>
> Make CAS retry logic configurable:
> One should be able to disable the internal CAS retry loop (when the condition is not
met) and let the client choose how to do retries (so the client does not have to incur the
server side random sleep of up to 100ms). Basically let the client handle all CAS retries
in a manor it sees fit.
> Secondly the hardcoded sleep up to 100ms that happens when cassandra fails to meet the
CAS condition should be configurable.
> - The max duration should be configurable
> - The algorithm used to choose the duration should be configurable (Random, Exponential,
etc).



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