Re: [Postgres-xc-general] Our general use case

[Koichi S. <koi...@gm...>]

The result looks very similar to the one I've seen.   Maybe this is
what we should expect with DRBD.
----------
Koichi Suzuki


2012/11/9 Vladimir Stavrinov <vst...@gm...>:
> On Tue, Nov 6, 2012 at 4:55 AM, Koichi Suzuki <koi...@gm...> wrote:
>
>> Does anybody has performance data for DRBD with PostgreSQL?   The
>> following reports that the throughput will become almost half.
>>
>> http://archives.postgresql.org/pgsql-performance/2007-09/msg00118.php
>
> I've reproduced this test against postgresql-9.1 with similar or even
> worse results. Though experiment was not clean because of outsider
> load on system, but kernel and drbd are not most recent. This is
> confirmed by my other experiment with dd writes where 45% in speed was
> lost on drbd. But this is one more argument in favor of internal HA
> where we can expect better results.