[Linux-cluster] software disk mirroring (raid-1) and cluster?

[gordan at bobich.net]

On Mon, 12 Nov 2007, Lon Hohberger wrote:

> On Fri, 2007-11-09 at 13:00 -0500, Jeff Wasilko wrote:
>> Hi:
>>
>> We're considering moving an application from Solaris (and Sun's cluster
>> software) to Linux (and RHCS). The application (campus-wide mail) has
>> stringent data availability requirements, so currently we are doing
>> host-based mirroring between 2 totally separate hardware arrays.
>>
>> Can I use the MD (multi-device) software to mirror under RHCS?
>
> You can't use md from multiple nodes in a cluster in a sane way.  It
> might work, but it'd be purely accidental.
>
> I believe the technology you need to look in to is cluster mirroring.

Yup. Look at network block devices (NDB or GNDB).

Gordan