On 2012-11-12 14:43, Gabriele Bulfon wrote:
BTW, I understand that HA clustering and the two-heads Supermicro can help, but if the problem was just zfs iScsi software not responding, I don't think the hardware HA would have solved. Don't you think so?
Depends. For example, if the HA software would detect that the pool is not responding - neither to data requests nor to commands - and that ultimately the system is unresponsive (bash fails), it could at least alert the admins in a timely manner or perhaps contact IPMI and cause reset of the hardware server (STONITH) followed by service failover to the working head (reimport pool, reshare shares) while you try figure what was wrong with the first head, if it's anything persistent. But, it is all well-known though unpracticed theory to me. We have planned many HA deployments for our customers as "the next stages" after implementing the servers and services they needed in a cheap "unreliable" single-headed manner, but nearly nobody has yet shelled out some cash to actually build a complete cluster. That was a roundabout way to say that I can be mistaken here and there ;) //Jim Klimov ------------------------------------------- illumos-discuss Archives: https://www.listbox.com/member/archive/182180/=now RSS Feed: https://www.listbox.com/member/archive/rss/182180/21175430-2e6923be Modify Your Subscription: https://www.listbox.com/member/?member_id=21175430&id_secret=21175430-6a77cda4 Powered by Listbox: http://www.listbox.com
