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.