[Gluster-users] gluster client hang when using iozone

Tomasz Chmielewski mangoo at wpkg.org
Mon Jun 7 12:36:55 UTC 2010

Am 07.06.2010 14:27, Daniel Maher wrote:
> On 06/07/2010 02:24 PM, Tomasz Chmielewski wrote:
>>>> What distro ? What kernel version ? Hardware specs ?
>>> Debian Lenny, 64 bit, 2.6.26 kernel.
>>> The specs are "more or less" high end.
>>> I see there is a bug entry describing a similar issue:
>>> http://bugs.gluster.com/cgi-bin/bugzilla3/show_bug.cgi?id=902
>>> but I don't use any NFS/translators here, so not sure if it's the same
>>> or not.
>>> The bug also points to a different bug in io-cache, which I also use -
>>> so I'll try to disable it and see if it changes anything.
>> Unfortunately, it still hangs, even if I comment out the io-cache
>> section from my gluster client configuration.
>> Any hints on how to debug this would be appreciated.
> Is it just IOZone that creates undesirable operating conditions, or have
> you tried other testing tools as well ?

I've seen some curious "hangs" once a month or so with glusterfs 2.x and 
"normal" system usage - but I didn't have a way to reproduce it (I 
didn't try iozone, though).

I upgraded to glusterfs 3.0.4 and hoped it will cure my hangs, then 
thought it's a good idea to test it with iozone... And hence the hangs.

So no, other than iozone, I don't have any other way to reproduce it.

Tomasz Chmielewski

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