[Linux-cluster] Very poor performance of GFS2

[Jordi Prats]

I supose you say so because the disk could be slow, but it should not be 
this slow because they virtual machines and they are accesing the same 
way as is the local disk. (Both are LVM volumes)

I found almost no documentation about how to install GFS2, so I'm 
assuming I did something wrong. I supose GFS2 do not add about 5 minutes 
of delay because of it's operations!

Jordi

David Teigland wrote:
> On Thu, Jun 21, 2007 at 12:57:03PM +0200, Jordi Prats wrote:
>   
>> Hi all,
>> I'm getting a very poor performance using GFS2. Here some numbers:
>>
>> A disk usage on a GFS2 filesystem:
>>
>> [root at urani CLUSTER]# time du -hs PostgreSQL814/postgresql-8.1.4/
>> 121M    PostgreSQL814/postgresql-8.1.4/
>>
>> real    5m49.597s
>> user    0m0.000s
>> sys     0m0.004s
>>
>>
>> On the local disk:
>>
>> [root at urani CLUSTER]# time du -hs postgresql-8.1.4/
>> 116M    postgresql-8.1.4/
>>
>> real    0m0.015s
>> user    0m0.000s
>> sys     0m0.016s
>>     
>
> You should compare with gfs1, that will tell you if the gfs2 numbers are
> in the right ballpark.
>
> Dave
>
>
>
>   


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