[Ocfs2-users] Cluster setup

[Alexei_Roudnev]

You better use

 LVM + heartbeat + NFS + cold failover cluster.

It works 100% stable and is 100% safe from the bugs (and it allows online 
resizing, if your HBA or iSCSI can add lun's on the fly).

Combining NFS + LVM + OCFSv2 can cause many unpredictable problems, esp. on 
the unusual (for OCFSv2) system (such as Ubuntu).

----- Original Message ----- 
From: "Brian Anderson" <banderson at athenahealth.com>
To: <ocfs2-users at oss.oracle.com>
Sent: Tuesday, October 09, 2007 11:35 AM
Subject: RE: [Ocfs2-users] Cluster setup



Not exactly. I'm in a similar boat right now. I have 3 NFS servers all
mounting an OCFS2 volume. Each NFS server has its own IP, and the
clients load balance manually... some mount fs1, others fs2, and the
rest fs3. In an ideal world, I'd have the NFS cluster presenting a
single IP, and failing over / load balancing some other way.

I'm looking at NFS v4 as one potential avenue (no single IP, but it does
let you fail over from 1 server to the next in line), and commercial
products such as IBRIX.




Brian

> -----Original Message-----
> From: ocfs2-users-bounces at oss.oracle.com
> [mailto:ocfs2-users-bounces at oss.oracle.com] On Behalf Of Sunil Mushran
> Sent: Tuesday, October 09, 2007 2:27 PM
> To: Luis Freitas
> Cc: ocfs2-users at oss.oracle.com
> Subject: Re: [Ocfs2-users] Cluster setup
>
> Unsure what you mean.  If the two servers mount the same
> ocfs2 volume and export them via nfs, isn't that clustered nfs?
>
> Luis Freitas wrote:
> >
> > Is there any cluster NFS solution out there? (Two NFS
> servers sharing
> > the same filesystem with distributed locking and failover
> capability)
> >
> > Regards,
> > Luis
> >
> > */Sunil Mushran <Sunil.Mushran at oracle.com>/* wrote:
> >
> >     Appears what you are looking for is a mix of ocfs2 and nfs.
> >     The storage servers mount the shared disks and the reexport
> >     them via nfs to the remaining servers.
> >
> >     ubuntu 6.06 is too old. If you are stuck on Ubuntu LTS, the
> >     next version 7.10 should have all you want.
> >
> >     Pavel Georgiev wrote:
> >     > Hi List,
> >     >
> >     > I`m trying to build a cluster storage with commodity
> hardware in
> >     a way that
> >     > the all the data would be on > 1 server. It should
> have the meet
> >     the
> >     > following requirements:
> >     > 1) If one of the servers goes down, the cluster
> should continue
> >     to work with
> >     > rw access from all clients.
> >     > 2) Clients that mount the storage should not be part
> of cluster
> >     (not export
> >     > any disk storage) - I have few servers with huge disks that I
> >     want to store
> >     > data on (currently 2 servers, maybe more in the future) and I
> >     want to
> >     > storethe data only on them, the rest of the server should just
> >     mount and use
> >     > that storage with the ability to continue operation if one of
> >     the two storage
> >     > servers goes down.
> >     > 3) More servers should be able to join the cluster
> and at given
> >     point,
> >     > expanding the total size of the cluster, hopefully without
> >     rebuilding the
> >     > storage.
> >     > 4) Load balance is not a issue - all the load can go to one of
> >     the two storage
> >     > servers (although its better to be balanced), the main goal is
> >     to have
> >     > redundant storage
> >     >
> >     > Does ocfs2 meet these requirements? I read few howtos but none
> >     of them
> >     > mentioned my second requirement (only some of the servers to
> >     hold the data).
> >     >
> >     > Are there any specific steps to do to accomplish (2) and (3)?
> >     >
> >     > I`m using Ubuntu 6.06 on x86.
> >     >
> >     > Thanks!
> >     >
> >     > _______________________________________________
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> >     > Ocfs2-users at oss.oracle.com
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> >     >
> >
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