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https://issues.apache.org/jira/browse/ZOOKEEPER-866?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13010167#comment-13010167
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Mahadev konar commented on ZOOKEEPER-866:
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jurgen/Maya,
We had exprimented with this patch a lot and realized that the throughput
does not change a lot without logging to disk. The numbers were almost as close
to logging to disk. Logging to disk wasnt a bottleneck. We had been trying to
find out what might have increased the thoughput but had didnt get a chance to
work through it.
Also, the patch as Jurgen said if the Leader server crashes will bring down the
whole cluster.
> Adding no disk persistence option in zookeeper.
> -----------------------------------------------
>
> Key: ZOOKEEPER-866
> URL: https://issues.apache.org/jira/browse/ZOOKEEPER-866
> Project: ZooKeeper
> Issue Type: New Feature
> Reporter: Mahadev konar
> Assignee: Mahadev konar
> Fix For: 3.4.0
>
> Attachments: ZOOKEEPER-nodisk.patch
>
>
> Its been seen that some folks would like to use zookeeper for very fine
> grained locking. Also, in there use case they are fine with loosing all old
> zookeeper state if they reboot zookeeper or zookeeper goes down. The use case
> is more of a runtime locking wherein forgetting the state of locks is
> acceptable in case of a zookeeper reboot. Not logging to disk allows high
> throughput on and low latency on the writes to zookeeper. This would be a
> configuration option to set (ofcourse the default would be logging to disk).
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