5 Apr
2012
5 Apr
'12
2:02 a.m.
note: you need at least three nodes (preferably more than 5) to run swift. you also need a second NIC for the nodes to talk to each other - they chatter a LOT. you can imagine it as something like:
3 nodes is the practical minimum for any sort of distributed system no matter how you do it. With less than 3 you can't have quorum if one node goes away.
You can have a dedicated quorum/witness server (or device) that doesn't provide any other cluster resources. There are often better ways of achieving similar results than a 2 node cluster though. James