Hi,
On Thu, 7 Oct 1999 01:59:31 -0500, [EMAIL PROTECTED]
(G.W. Wettstein) said:
>> If this works, you can also add a third machine and make a threefold
>> raid1 for added HA. Curious myself if this would work. Unfortunately
>> cannot test this myself.
> This strategy for doing HA has interested us as well. Just a few
> comments:
> First of all the current NBD implementation, at least the pieces of it
> that we have been able to find, is not sufficiently robust to
> implement this strategy in a production environment.
There are at least two teams working on beefing up NBD, including the
addition of proper connection resync and a kernel-based server.
A much more thorny problem is the management of network breaks between
the two disks --- you have to deal with all the clustering issues
surrounding quorum management or you end up with both disks failing the
other side over to themselves and you can't resolve the conflict
afterwards.
--Stephen
