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Re: [Linux-cluster] (newbie) mirrored data / cluster ?



Hi,
i think the closest solution to AVS will be drbd: http://www.drbd.org/

DRBD takes over the data, writes it to the local disk and sends it to the other host. On the other host, it takes it to the disk there.



The other components needed are a cluster membership service, which is supposed to be heartbeat, and some kind of application that works on top of a block device.



Examples:

A filesystem & fsck.

A journaling FS.

A database with recovery capabilities.



----- Original Message ----- From: "Tomasz Sucharzewski" <tsucharz poczta onet pl>
To: <linux-cluster redhat com>
Sent: Tuesday, April 01, 2008 9:29 PM
Subject: Re: [Linux-cluster] (newbie) mirrored data / cluster ?


Hello,

BTW do you know any software solution that supports asynchronous replication on Linux like AVS on Solaris ?

Best regards,
Tomek

On Mon, 31 Mar 2008 14:17:59 -0500
Chris Harms <chris cmiware com> wrote:

The non-SAN option would be to use DRBD (http://www.drbd.org) and put
NFS, Samba, etc on top of the DRBD partition.

Chris

MARTI, ROBERT JESSE wrote:
> You don't have to have a mirrored LVM to do what youre trying to do.
> You just need a common mountable share - typically a SAN or NAS.  It
> shouldn't be too hard to configure (and I've already done it).  You
> don't even *have* to have cluster suite - if you have a load balancer.
> My brain isn't fast enough today to figure out how to share a load
> without a load balanced VIP or a DNS round robin (which should be easy
> to do as well).
>
> Rob Marti
> Systems Analyst II
> Sam Houston State University
>
> -----Original Message-----
> From: linux-cluster-bounces redhat com
> [mailto:linux-cluster-bounces redhat com] On Behalf Of Daniel Maher
> Sent: Monday, March 31, 2008 12:40 PM
> To: linux-cluster redhat com
> Subject: [Linux-cluster] (newbie) mirrored data / cluster ?
>
> Hello all,
>
> I have spent the day reading through the mailing list archives, Redhat
> documentation, and CentOS forums, and - to be frank - my head is now
> swimming with information.
>
> My scenario seems reasonably straightforward : I would like to have two
> file servers which mirror each others' data, then i'd like those two
> servers to act as a cluster, whereby they serve said data as if they
> were one machine. If one of the servers suffers a critical failure, > the
> other will stay up, and the data will continue to be accessible to the
> rest of the network.
>
> I note with some trepidation that this might not be possible, as per
> this document :
> http://www.redhat.com/docs/manuals/enterprise/RHEL-5-manual/en-US/RHEL51
> 0/Cluster_Logical_Volume_Manager/mirrored_volumes.html
>
> However, i don't know if that document relates to the same scenario > i've
> described above.  I would very much appreciate any and all feedback,
> links to further documentation, and any other information that you > might
> like to share.
>
> Thank you !
>
>
> --
> Daniel Maher <dma AT witbe.net>
>
> --
> Linux-cluster mailing list
> Linux-cluster redhat com
> https://www.redhat.com/mailman/listinfo/linux-cluster
>

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--
Tomasz Sucharzewski <tsucharz poczta onet pl>

--
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