[Date Prev][Date Next]   [Thread Prev][Thread Next]   [Thread Index] [Date Index] [Author Index]

Re: [Linux-cluster] Very poor performance of GFS2



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 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 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





--
......................................................................
        __
       / /          Jordi Prats
 C E / S / C A      Dept. de Sistemes
     /_/            Centre de Supercomputació de Catalunya

 Gran Capità, 2-4 (Edifici Nexus) · 08034 Barcelona
 T. 93 205 6464 · F.  93 205 6979 · jprats cesca es
......................................................................
[Date Prev][Date Next]   [Thread Prev][Thread Next]   [Thread Index] [Date Index] [Author Index]