[Gluster-users] No linear scaling

[Jon Tegner]

I made an error in creating the raids. Get the expected behavior now.




/j






On Jun 17, 2010 13:00 "Jon Tegner" <tegner at renget.se> wrote:

> Hi,
> 
> 
> 
> I'm only recently started playing with glusterfs. My set up consists
> of
> two servers (noriko and kumiko), each with twelve 1Tb disk, raided
> together in raid10.
> 
> 
> 
> 
> The systems have CentOS-5.5 installed, and I have
> installed glusterfs-3.0.4-1 (client, common and server).
> 
> 
> 
> 
> I have generated the server and client files with:
> 
> 
> 
> 
> glusterfs-volgen --name store1 --transport tcp noriko:/mnt/raid10/
> kumiko:/mnt/raid10
> 
> 
> 
> 
> I then mounted the filesystem with:
> 
> 
> 
> 
> glusterfs --volfile=/etc/glusterfs/store1-tcp.vol /mnt/glusterfs
> 
> 
> 
> 
> In a naive test of the performance I tried:
> 
> 
> 
> 
> dd if=largeFile of=copyOfLargeFile bs=1024k oflag=sync
> 
> 
> 
> 
> (largeFile is about 450 M)
> 
> 
> 
> 
> I did this first from one client, and then from two clients
> simultaneously. I expected the time to be about the same for the two
> cases, but in contrast it took about twice the time when doing the
> operation simultaneously. I'm probably missing something obvious here,
> and would appreciate any help.
> 
> 
> 
> 
> Regards,
> 
> 
> 
> 
> /jon