[Gluster-users] about HA infrastructure for hypervisors

[Tim Bell]

Assuming that we use a 3 copy approach across the hypervisors, does Gluster
favour the local copy on the hypervisor if the data is on
distributed/replicated ? 

It would be good to avoid the network hop when the data is on the local
disk.

Tim

> -----Original Message-----
> From: gluster-users-bounces at gluster.org [mailto:gluster-users-
> bounces at gluster.org] On Behalf Of Fernando Frediani (Qube)
> Sent: 28 June 2012 11:43
> To: 'Nicolas Sebrecht'; 'Thomas Jackson'
> Cc: 'gluster-users'
> Subject: Re: [Gluster-users] about HA infrastructure for hypervisors
> 
> You should indeed to use the same server running as a storage brick as a
> KVM host to maximize hardware and power usage. Only thing I am not sure
> is if you can limit the amount of host memory Gluster can eat so most of
it
> gets reserved for the Virtual Machines.
> 
> Fernando
> 
> -----Original Message-----
> From: gluster-users-bounces at gluster.org [mailto:gluster-users-
> bounces at gluster.org] On Behalf Of Nicolas Sebrecht
> Sent: 28 June 2012 10:31
> To: Thomas Jackson
> Cc: 'gluster-users'
> Subject: [Gluster-users] Re: about HA infrastructure for hypervisors
> 
> The 28/06/12, Thomas Jackson wrote:
> 
> > Why don't you have KVM running on the Gluster bricks as well?
> 
> Good point. While abtracting we decided to seperate KVM & Gluster but I
> can't remember why.
> We'll think about that again.
> 
> > We have a 4 node cluster (each with 4x 300GB 15k SAS drives in
> > RAID10), 10 gigabit SFP+ Ethernet (with redundant switching). Each
> > node participates in a distribute+replicate Gluster namespace and runs
> > KVM. We found this to be the most efficient (and fastest) way to run the
> cluster.
> >
> > This works well for us, although (due to Gluster using fuse) it isn't
> > as fast as we would like. Currently waiting for the KVM driver that
> > has been discussed a few times recently, that should make a huge
> > difference to the performance for us.
> 
> Ok! Thanks.
> 
> --
> Nicolas Sebrecht
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