Hi Alejandro,
Thanks for your feedback, much appreciated!
Enjoy your weekend!
MJ
On 11/26/20 4:39 PM, Alejandro Bonilla wrote:
On Nov 26, 2020, at 2:54 AM, mj <[email protected]> wrote:
Hi,
Yes, perhaps I should have given more details :-)
On 11/25/20 3:03 PM, Alejandro Bonilla wrote:
Have a look at /etc/fstab for any disk path mounts - since I think Proxmox uses
lvm mostly, you shouldn’t see a problem.
I will, thanks!
What is the pool replication configuration or ec-profile? How many nodes in the
cluster?
We're 3/2 replication, no ec. It's a three-node (small) cluster, 8 filestore
OSDs per node, with an SSD journal (wear evel 75%)
If it’s 3 replicas, min 2, then you should be able to clear all drives from a
system at once and replace them all to minimize the amount of times the cluster
will end up rebalancing.
We will be using samsung PM833 bluestore of the same size
(4TB spinners to 3.83GB PM833 SSDs)
Are you planning to remove all disks per server at once or disk by disk?
I was planning to:
- first add two SSDs to each server, and gradually increase their weight
Two per server to ensure the disk replacement will work as expected is a good
idea - I don’t think you’ll gain anything with a gradual re-weight.
- then, disk-by-disk, replace the 8 (old) spinners with the 6 remaining SSDs
IF you have two other replicas, then a full system disk replacement should be
no trouble - especially after two other SSDs were added and most data was
shuffled around.
Will all new drives equal or increase the disk capacity of the cluster?
Approx equal yes.
The aim in not to increase space.
There are other reasons why I ask, specifically based on PG count and balancing
of the cluster.
MJ
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