[Gluster-users] gluster taking a lot of CPU and crashes database at times

Joe Julian joe at julianfamily.org
Wed Aug 8 16:54:38 UTC 2012

> On Wed, Aug 8, 2012 at 4:30 PM, Philip Poten <philip.poten at gmail.com 
> <mailto:philip.poten at gmail.com>> wrote:
>     Hey,
>     running postgres (or any database) on a gluster share is an extremely
>     bad idea. This can and will not end well, no matter what you do.

I still don't see why people keep saying this. I've been running mysql 
on a GlusterFS volume since the 2.0 days. I know Avati  agrees with you 
though (though I keep trying to convince him otherwise).

The only problem I've ever had was with creation or alteration of MyISAM 
files as they create a temporary filename, then rename it. This often 
causes an error as the rename (apparently) hasn't completed before it 
tries to open again (a bug that still seems to exist in 3.3.0).

InnoDB files can actually be quite efficient on a distributed volume if 
you create sufficient file segments to be distributed across subvolumes.

The only real problem would be if someone thought they could run 
multiple instances of the database server. Regardless of what filesystem 
they're on, relational database engines are not built to be able to do that.
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