[Ocfs2-users] Cluster setup

Alexei_Roudnev Alexei_Roudnev at exigengroup.com
Tue Oct 9 11:59:32 PDT 2007 

He better use standard, well tested and widely-used heartbeat + LVM + NFS 
configuration (but it require APC switch for better reliability).


----- Original Message ----- 
From: "Sunil Mushran" <Sunil.Mushran at oracle.com>
To: "AJ Weber" <aweber at comcast.net>
Cc: <ocfs2-users at oss.oracle.com>
Sent: Tuesday, October 09, 2007 11:52 AM
Subject: Re: [Ocfs2-users] Cluster setup


> That won't handle the nfs server death case. What he wants
> is for the client to transparently mount the volume from another
> nfs server.
>
> AJ Weber wrote:
>> Is it possible to augment with something straightforward and simple like 
>> Pen or Balance?
>>  (I forget if those are HTTP-specific.)
>>  Also, if you want to do rudimentary load balancing (maybe a half-step 
>> better than the manually load balanced config, below), you can add all 
>> three servers' IP Addresses to the DNS under one name, and the DNS 
>> server(s) _should_ randomly choose an entry to return.  That might work, 
>> since NFS is session-based (AFAIK), and should stay with the same server 
>> after session initiation.
>>  My $0.02, please adjust for inflation. ;)
>>  -AJ
>>
>>     ----- Original Message -----
>>     *From:* Brian Anderson <mailto:banderson at athenahealth.com>
>>     *To:* ocfs2-users at oss.oracle.com <mailto:ocfs2-users at oss.oracle.com>
>>     *Sent:* Tuesday, October 09, 2007 2:35 PM
>>     *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>
>>     > [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 <mailto: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>/
>>     <mailto:Sunil.Mushran at oracle.com%3E/>* 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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>>     > >     >
>>     > >
>>     > >
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