[Ocfs2-users] Cluster setup
Sunil Mushran
Sunil.Mushran at oracle.com
Wed Oct 10 09:57:48 PDT 2007
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" <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
>>>> > http://oss.oracle.com/mailman/listinfo/ocfs2-users
>>>>
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