On Sun, Feb 2, 2014 at 12:46 AM, Andrew Lau <andrew@xxxxxxxxxxxxxx> wrote:
> Hi all,
Hi,
This is what cgroups are for. Looking forward to you setting this up
>
> Sadly my google skills aren't finding me any results - is there an option to
> limit the CPU usage and/or the disk IO intensity of glusterfsd.
and telling us how it goes and what the optimized values are. AFAIK,
gluster doesn't have anything built in to limit this. I actually don't
think that it makes sense for it to either.
Thanks for the suggestions on cgroups, I actually did not think about that. I'll try that and report my findings.
Not sure what the correct solution is here. Maybe other gluster dev's
>
> Example scenario, oVirt + gluster on the same host when it comes to adding
> an extra host + replicated brick the original host with the brick goes crazy
> with 500% cpu as it copies just under 1TB of data across to the new
> replicated brick. Going crazy I mean everything else will hang, simple "ls"
> command will take 30+ seconds.
can comment. Although it's really not detailed and you comment is
unclear, so i'd elaborate before expecting a good response.
Sorry for the poor choice of wordings - here's attempt 2:
Host 1 (1TB brick w/ no replica)
Host 2 (NEW - 1TB brick to join Host 1 as replica 2)
Top will report glusterfsd with up to 500% CPU usage (combined processes). Causing the system to grind to a halt very quickly.
>I occasionally use shorewall+puppet-gluster to rate limit the network
> Limiting the network bandwidth to 200Mbps seems to solve this issue, I'm
> quite sure this is a CPU issue rather than IO so I was wondering if there's
> any possibility to limit this down so the nic's itself don't have to get
> rate limited.
interfaces. Puppet-Gluster could do per interface and per port/gluster
connection throttling.
Rate limiting seems to be only solution right now (until I take a look into cgoups). It seems the CPU cannot handle the high cpu usage that glusterfsd will create.
>
> Thanks,
> Andrew
HTH,
James
_______________________________________________ Gluster-users mailing list Gluster-users@xxxxxxxxxxx http://supercolony.gluster.org/mailman/listinfo/gluster-users
