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Re: [Xen-users] Re: High Availablility

To: Paul Gear <paul@xxxxxxxxxxxxxxx>
Subject: Re: [Xen-users] Re: High Availablility
From: Jeff Williams <jeffw@xxxxxxxxxxxxxx>
Date: Mon, 04 May 2009 10:07:56 +0800
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On 02/05/09 06:24, Paul Gear wrote:
Jeff Williams wrote:
Hi,

I was wondering if there is software out there for Xen which will handle
high availability for a cluster of servers. By high availability here I
mean if one of the Xen physical nodes should die, the VMs from that host
will be started on other nodes. I know something like this can be
achieved with linux ha for a pair of servers, but I'm looking for
something which will work across 5 or more servers and I can't see
anything documented for this.

In what way is Linux HA limited to a pair of servers?  The 2.x series
supports up to 16 servers, OCFS2 supports at least 8, and most low end
disk arrays i've worked with support at least 4 hosts per LUN.

Paul,

I saw on the Linux HA site that version 2 supported more than 2 hosts, but I couldn't find documentation for it anywhere. Is there any documentation or examples for this that anyone knows about? Is anyone using this for more than 2 nodes?

I've got no issues on the storage side, it's just automatically restarting the VMs in the case of node failure that I am after.

Thanks,
Jeff

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