Dmitry Konstantinov created ZOOKEEPER-3408:
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Summary: Improve information about risks for forceSync config
option
Key: ZOOKEEPER-3408
URL: https://issues.apache.org/jira/browse/ZOOKEEPER-3408
Project: ZooKeeper
Issue Type: Improvement
Components: documentation
Reporter: Dmitry Konstantinov
[https://zookeeper.apache.org/doc/r3.5.5/zookeeperAdmin.html#Unsafe+Options]
{quote}
The following options can be useful, but be careful when you use them. The risk
of each is explained along with the explanation of what the variable does.
{quote}
{quote}
_forceSync_ : (Java system property: *zookeeper.forceSync*) Requires updates to
be synced to media of the transaction log before finishing processing the
update. If this option is set to no, ZooKeeper will not require updates to be
synced to the media.
{quote}
The risks for this option are not very clear. Does it only the risk of loss
some recent committed transactions if all Zookeeper instances from an ensemble
are crashed and restarted at almost the same time or some other problems are
also possible?
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