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From Prabhjot Bharaj <prabhbha...@gmail.com>
Subject Re: Optimization - dedicated transaction log directory
Date Wed, 07 Oct 2015 05:48:23 GMT
Hi,

Thanks for the answer.

Regards,
Prabhjot

On Mon, Oct 5, 2015 at 9:52 PM, Edward Ribeiro <edward.ribeiro@gmail.com>
wrote:

> Hi,
>
> By avoiding to put the *transaction log dir* on a busy device, competing
> for disk I/O with the snapshot data and other systems (e.g, HDFS or HBase).
> The transaction log is critical to ZK performance because ZK syncs the
> transactions on disk before returning a response, according to
> http://zookeeper.apache.org/doc/r3.1.2/zookeeperAdmin.html. So, a fast
> disk
> is recommended, even if not that large. This principle of putting
> commit/transaction logs on dedicated devices is highly recommended by other
> big data systems like Cassandra, for example.
>
> Regards,
> Ed
>
>
> On Mon, Oct 5, 2015 at 10:45 AM, Prabhjot Bharaj <prabhbharaj@gmail.com>
> wrote:
>
> > Hi,
> >
> >
> > I was going through the 'Other Optimizations' section in this link:
> >
> >
> https://zookeeper.apache.org/doc/r3.4.6/zookeeperStarted.html#Other+Optimizations
> > I would like to understand the relevance of 'dataLogDir'
> >
> >
> > How does having a different value of dataLogDir improve the performance
> ??
> >
> > Regards,
> > Prabhjot
> >
>



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