[clug] GFS - add some more abstraction [SEC=PERSONAL]
email.agupta at gmail.com
Tue Mar 30 17:49:39 MDT 2010
GFS has to be added as a service under RH Cluster Suite to operate as designed. This means it will need all software components that RHCS needs and in addition will also need shared SCSI 3 persistent reservation LUN (storage fencing), a hardware power switch or integration with onboard admin card to switch off the node (STONITH) etc .
Any CFS correctly deployed will be more scalable compared to NFS. You can also share GFS over the network using GFS Network Block Device (GNBD). However you are right in saying that GFS has more overheads compared to NFS and is not ideal for running in a small environment.
On 31/03/2010, at 10:16 AM, Roppola, Antti wrote:
> Hi all,
> So is it just me, or does GFS suffer from compulsive abstraction?
> For a shared filesystem it seems to want layers for clustering, LVM and
> a good fistful of services too.
> It seems a bit of overkill if one just wants a shared filesystem on a
> small private network. I find myself thinking fondly about NFS and
> wondering if GFS is really worth all that extra effort.
> Has anyone else grappled with this?
> P.S. The GFS documentation also seems pretty patchy. There's a few
> behemoth documents that seem to assume you are building a data centre
> and not too much on why each layer is important.
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