Hello! Fri, May 29, 2020 at 09:58:58AM +0200, pr wrote:
Hans van den Bogert (hansbogert) writes:
I would second that, there's no winning in this case for your requirements and single PSU nodes. If there were 3 feeds, then yes; you could make an extra layer in your crushmap much like you would incorporate a rack topology in the crushmap.
I'm not fully up on coffee for today, so I haven't yet worked out why 3 feeds would help ? To have a 'tie breaker' of sorts, with hosts spread across 3 rails ?
You can break up your setup on 3 pieces, so outage of one of them will not lead to outage of more than 1/3 of your cluster. So your cluster will survive. All of your switches, connected to 2 PDUs with separate PSU, will survive in case of outage of one PDU/PSU/ATS.