[Gluster-users] Write performance in a replicated/distributed setup with KVM?

2012-03-04 Thread Harald Hannelius
t.img 4.5G/gluster/debtest.img I noted that the processlist shows that direct-io-mode is disabled. Default should be on, or should it? Any help is really appreciated! -- Harald Hannelius | harald.hannelius/a\arcada.fi | +358 50 594 1020 ___ Gluster-use

Re: [Gluster-users] Write performance in a replicated/distributed setup with KVM?

2012-03-03 Thread Harald Hannelius
--- 3 packets transmitted, 3 received, 0% packet loss, time 1998ms rtt min/avg/max/mdev = 0.155/0.169/0.187/0.013 ms As said before, I don't think there's a problem with the LAN. Trust me, I would know about it :) On Fri, Mar 2, 2012 at 8:55 AM, Harald Hannelius wrote: On

Re: [Gluster-users] Write performance in a replicated/distributed setup with KVM?

2012-03-02 Thread Harald Hannelius
On Fri, 2 Mar 2012, Brian Candler wrote: On Fri, Mar 02, 2012 at 05:25:18PM +0200, Harald Hannelius wrote: I'll have to test with just a two-way replica, and see if I get better performance out of that. I'm gonna loose the capability to have one node at the other site then Ah...

Re: [Gluster-users] Write performance in a replicated/distributed setup with KVM?

2012-03-02 Thread Harald Hannelius
On Fri, 2 Mar 2012, Brian Candler wrote: On Fri, Mar 02, 2012 at 03:33:19PM +0200, Harald Hannelius wrote: The pattern for me starts to look like this; max-write-speed ~= /nodes. This is most odd. If you are using a regular replicated+distributed (not striped) volume, then each file

Re: [Gluster-users] Write performance in a replicated/distributed setup with KVM?

2012-03-02 Thread Harald Hannelius
On Fri, 2 Mar 2012, Samuli Heinonen wrote: 2.3.2012 15:33, Harald Hannelius kirjoitti: The pattern for me starts to look like this; max-write-speed ~= /nodes. Have you tried tuning performance.io-thread-count setting? More information about that can be found at http://docs.redhat.com

Re: [Gluster-users] Write performance in a replicated/distributed setup with KVM?

2012-03-02 Thread Harald Hannelius
On Fri, 2 Mar 2012, Brian Candler wrote: On Fri, Mar 02, 2012 at 02:41:30PM +0200, Harald Hannelius wrote: So next is back to the four-node setup you had before. I would expect that to perform about the same. So would I expect too. But; # time dd if=/dev/zero bs=1M count=2 of=/gluster

Re: [Gluster-users] Write performance in a replicated/distributed setup with KVM?

2012-03-02 Thread Harald Hannelius
On Fri, 2 Mar 2012, Brian Candler wrote: On Fri, Mar 02, 2012 at 01:02:39PM +0200, Harald Hannelius wrote: If both are fast: then retest using a two-node replicated volume. gluster volume create test replica 2 transport tcp aethra:/data/single alcippe:/data/single Volume Name: test Type

[Gluster-users] Write performance in a replicated/distributed setup with KVM?

2012-03-02 Thread Harald Hannelius
t.img 4.5G/gluster/debtest.img I noted that the processlist shows that direct-io-mode is disabled. Default should be on, or should it? Any help is really appreciated! -- Harald Hannelius | harald.hannelius/a\arcada.fi | +358 50 594 1020 ___ Gluster-use