[sheepdog-users] Redundancy and High Availability

[Lindsay Mathieson]

Hi all, playing around with sheepdog on Proxmox, which packages the 
8.3.1 version, but will be upgrading to 1.0 soon.


I've setup a test 3 node cluster and formatted it with copies=3, 
installed a couple of VM's using the block driver - write performance is 
really only acceptable if I turn sync off. Haven't tried a SSD journal yet.


 From what I saw in the docs, and in testing - you can only write to the 
cluster with copies=3 when all three nodes are up, which isn't terribly 
useful. Kinda negates the whole point of redundancy. With Ceph and 
Gluster I can specify replica 3 and if a node goes down it allows writes 
and heals the data intelligently when the ndoe comes back up.


Is this possible with sheepdog?


-- 
Lindsay Mathieson