Hello! On Thu, Oct 5, 2017 at 12:21 AM, Bryan Sockel <Bryan.Sockel@altn.com> wrote:
Is there any performance loss from your if your gluster replica 3 servers are not all the same configuration?
Server 1 - Primary 16 X 1.2 TB 10k Drives - Raid 10 - Stripe 256k (2.5 Drives) 1 CPU - Intel(R) Xeon(R) CPU E5-2609 v3 @ 1.90GHz 64 GB Memory
Server 2 - Replica 8 X 6 TB 7.5 RPM Drives - Raid 10 - Trip 512 (3.5) 1 CPU - Intel(R) Xeon(R) CPU E5-2609 v3 @ 1.90GHz 16 GB Memory
As gluster needs to copy each 'write' operation twice and it waits for actual completion of every op, your write iops will be limited by the slowest drive.
Server 3 - Arbiter (Also Virtual machine node) 2 X 1.2 TB 10k Drives Raid 10 2 CPU - Intel(R) Xeon(R) CPU E5-2620 v4 @ 2.10GHz 192 GB Memory
But it will be relaxed for the arbiter node, as arbiter keeps no data, therefore no writes* happens on it, so it doesn't impacts overall performance * There are actually some metadata updates on the arbiter node, which are, obviously, write operations, but we can neglect them.