[Gluster-users] Possible to put some sort of qos/rate-limit on glusterfsd?

[John Mark Walker]

This sounds exciting! I'm looking forward to the writeup :) 

-JM 

----- Original Message -----

> Quick update, I've successfully got glusterfs running with cgroups and I'm
> very impressed with the results.

> I'll write something up in the coming days - thanks again for the suggestion.

> On Mon, Feb 3, 2014 at 11:48 AM, Andrew Lau < andrew at andrewklau.com > wrote:

> > Thanks for the suggestions - I'm seeing some promising results with
> > cgroups.
> 

> > Just for confirmation - am I right in saying glusterd is just the
> > management
> > daemon? and glusterfsd is the actual process which does the checksums,
> > replication, healing etc?
> 

> > On Mon, Feb 3, 2014 at 10:18 AM, Dan Mons < dmons at cuttingedge.com.au >
> > wrote:
> 

> > > Try experimenting with performance.io-thread-count to see if that has an
> > > impact.
> > 
> 

> > > -Dan
> > 
> 
> > > ----------------
> > 
> 
> > > Dan Mons
> > 
> 
> > > Skunk Works
> > 
> 
> > > Cutting Edge
> > 
> 
> > > http://cuttingedge.com.au
> > 
> 

> > > On 2 February 2014 15:46, Andrew Lau < andrew at andrewklau.com > wrote:
> > 
> 
> > > > Hi all,
> > 
> 
> > > >
> > 
> 
> > > > 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.
> > 
> 
> > > >
> > 
> 
> > > > 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.
> > 
> 
> > > >
> > 
> 
> > > > 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.
> > 
> 
> > > >
> > 
> 
> > > > Thanks,
> > 
> 
> > > > Andrew
> > 
> 
> > > >
> > 
> 
> > > > _______________________________________________
> > 
> 
> > > > Gluster-users mailing list
> > 
> 
> > > > Gluster-users at gluster.org
> > 
> 
> > > > http://supercolony.gluster.org/mailman/listinfo/gluster-users
> > 
> 

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