Thanks a lot for your answer. The thing is, we had data lose disaster last month, and that's why we've decided to deploy a cmmpletely new environment for taht pirpose, and let me tell you what happened. We are using Ovirt 4.1 with Gluster 3.8 for our production, and the cluster contains five hosts, three of them are storage servers. I've added two more hosts, and manually via CLI (as I couldn't do this via GUI) created a new brick on one of the newely added nodes,and expanded the volume with the parameter "replica = 4 as it was refused to expand without setting the replica count. The action was successful for both the engine vol, and the data vol, however, few minutes later we've found that the disk sizes (images) of the existing VMs got shrunk and lost all of the data, and we had to recover from backup.. We can't afford another downtime (another disaster I mean), that's why I'm so maticulous about what to do next, so, is there a good guide around for the architecure and sizing?
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