Re: [Lustre-discuss] Setup mail cluster

2009-10-13 Thread Bernd Schubert
On Monday 12 October 2009, Michael Schwartzkopff wrote:
> Am Montag, 12. Oktober 2009 15:54:04 schrieb Vadym:
> > Hello
> > I'm do a schema of mail service so I have only one question:
> > Can Lustre provide me full automatic failover solution?
> 
> No. See the lustre manual for this. You need a cluster solution for this.
> The manual is *hopelessly* outdate at this point. Do NOT user heartbeat any
> more. User pacemaker as the cluster manager. See www.clusterlabs.org.
> 
> When I find some time I want to write a HOWTO about setting up a lustre
>  clsuter with pacemaker and OpenAIS.

Also see bug 20807 (https://bugzilla.lustre.org/show_bug.cgi?id=20807) for a 
pacemaker agent.


Cheers,
Bernd
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Re: [Lustre-discuss] Setup mail cluster

2009-10-12 Thread Bernd Schubert
On Monday 12 October 2009, Michael Schwartzkopff wrote:
> Am Montag, 12. Oktober 2009 15:54:04 schrieb Vadym:
> > Hello
> > I'm do a schema of mail service so I have only one question:
> > Can Lustre provide me full automatic failover solution?
> 
> No. See the lustre manual for this. You need a cluster solution for this.
> The manual is *hopelessly* outdate at this point. Do NOT user heartbeat any
> more. User pacemaker as the cluster manager. See www.clusterlabs.org.
> 
> When I find some time I want to write a HOWTO about setting up a lustre
>  clsuter with pacemaker and OpenAIS.

Also see bug 20807 (https://bugzilla.lustre.org/show_bug.cgi?id=20807) for a 
pacemaker agent.


Cheers,
Bernd

-- 
Bernd Schubert
DataDirect Networks
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Re: [Lustre-discuss] Setup mail cluster

2009-10-12 Thread Michael Schwartzkopff
Am Montag, 12. Oktober 2009 15:54:04 schrieb Vadym:
> Hello
> I'm do a schema of mail service so I have only one question:
> Can Lustre provide me full automatic failover solution?

No. See the lustre manual for this. You need a cluster solution for this.
The manual is *hopelessly* outdate at this point. Do NOT user heartbeat any 
more. User pacemaker as the cluster manager. See www.clusterlabs.org.

When I find some time I want to write a HOWTO about setting up a lustre clsuter 
with pacemaker and OpenAIS.

> I plan to use for storage the standard servers with 1GE links. I need
> automatic solution as possible.
> E.g. RAID5 functionality, when one or more storage node down user data
> still accessible. So if I have 100TB of disk storage I can serve 50TB of
> data in failover mode with no downtime. Can you provide me more
> information?

Is a  bond-device for cluster interconnect! It is more safe!

Use DRBD for replication of the data if you use Direct attached Storage.

DRBD can operate on top of LVM. So you can have that functionallity also.

Perhaps you can try clustered LVM. Has nice features.

Or just use ZFS, which offers all this.

-- 
Dr. Michael Schwartzkopff
MultiNET Services GmbH
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[Lustre-discuss] Setup mail cluster

2009-10-12 Thread Vadym
Hello
I'm do a schema of mail service so I have only one question:
Can Lustre provide me full automatic failover solution?
I plan to use for storage the standard servers with 1GE links. I need
automatic solution as possible.
E.g. RAID5 functionality, when one or more storage node down user data still
accessible. So if I have 100TB of disk storage I can serve 50TB of data in
failover mode with no downtime. Can you provide me more information?


-- 
Vadym Kurylovych
Systems Architect
Ukrainian Drupal Company
http://www.internetdevels.com/
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