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From ramkrishna vasudevan <ramkrishna.s.vasude...@gmail.com>
Subject Re: SSD vs Spinning disks
Date Tue, 11 Jun 2013 00:48:42 GMT
Currently this feature is not available.  But there is a JIRA that has been
raised to help in achieving this.
https://issues.apache.org/jira/browse/HBASE-6572.  Feel free to give your
comments over there.


On Tue, Jun 11, 2013 at 6:14 AM, Lucas Stanley <lucas23145@gmail.com> wrote:

> Hi,
> If I understand HBase's architecture correctly, it is only the WAL that
> needs to be placed on a SSD to make writes perform better?
> Because a write comes to a region server, then goes to the WAL and
> memstore. If the WAL is on SSD on this node and 2 other DataNodes, then the
> append writes will finish much faster, right?
> So, is there a way in HDFS to tell it to only put the HBase WALs
> (/hbase/.logs/) on a SSD disk and to keep the other HFiles on traditional
> spinning disks?

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