Hello,
I'm currently going through the process of migrating VMs from VMWare to Proxmox. I have 3 nodes in the Proxmox cluster. My intention is to convert the old VMWare hosts into a Ceph cluster once everything is moved over to the new servers. There are 3 of those and I have several old servers I can add if needed. I've read that while a 3 node Ceph cluster works, a 4 node cluster is the ideal minimum. Having no experience with Ceph as of yet, I cannot validate the validity of that.
The old VM hosts are Dell Poweredge R720s using dual Xeon E-5 2667v2 @ 3.3GHz CPUs and 256GB DDR3 RAM. As I said, there are 3 of those. Out of the half dozen or so other servers that are soon to be retired, the next closest thing I have to the R720 specs is a R720xd with dual E5-2660 @ 2.2GHz CPUs and 128GB of DDR3 RAM.
My question is, will using a 4th node with that big of a difference in specs have a huge effect on performance? I have 36 x 2TB SSDs (72TB Raw capacity before parity) to distribute across 4 servers. I just want to make sure this will work efficiently. Thanks in advance!
I'm currently going through the process of migrating VMs from VMWare to Proxmox. I have 3 nodes in the Proxmox cluster. My intention is to convert the old VMWare hosts into a Ceph cluster once everything is moved over to the new servers. There are 3 of those and I have several old servers I can add if needed. I've read that while a 3 node Ceph cluster works, a 4 node cluster is the ideal minimum. Having no experience with Ceph as of yet, I cannot validate the validity of that.
The old VM hosts are Dell Poweredge R720s using dual Xeon E-5 2667v2 @ 3.3GHz CPUs and 256GB DDR3 RAM. As I said, there are 3 of those. Out of the half dozen or so other servers that are soon to be retired, the next closest thing I have to the R720 specs is a R720xd with dual E5-2660 @ 2.2GHz CPUs and 128GB of DDR3 RAM.
My question is, will using a 4th node with that big of a difference in specs have a huge effect on performance? I have 36 x 2TB SSDs (72TB Raw capacity before parity) to distribute across 4 servers. I just want to make sure this will work efficiently. Thanks in advance!