Re: [Ocfs2-users] Cluster setup

Wed, 10 Oct 2007 10:02:46 -0700 

Unless the nfs client is able to silently connect to the next server,
it is not transparent.

Pavel Georgiev wrote:
How about using just OCFSv2 as I described in my first mail - two servers export their storage, the rest of the servers mount it and a failure of any of the two storage servers remains transparent to the clients. Can this be done with OCFSv2? 


On Tuesday 09 October 2007 21:46:15 Alexei_Roudnev wrote:

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" <[EMAIL PROTECTED]>
To: <[email protected]>
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: [EMAIL PROTECTED]
[mailto:[EMAIL PROTECTED] On Behalf Of Sunil Mushran
Sent: Tuesday, October 09, 2007 2:27 PM
To: Luis Freitas
Cc: [email protected]
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 <[EMAIL PROTECTED]>/* 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!
    >
    > _______________________________________________
    > Ocfs2-users mailing list
    > [email protected]
    > http://oss.oracle.com/mailman/listinfo/ocfs2-users

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