I talked to some guys on IRC about going back to the non-1 reweight OSD's and setting them to 1. I went from a standard deviation of 2+ to 0.5. Awesome. On Wed, Feb 26, 2020 at 10:08 AM shubjero <shubjero@gmail.com> wrote:
Right, but should I be proactively returning any reweighted OSD's that are not 1.0000 to 1.0000?
On Wed, Feb 26, 2020 at 3:36 AM Konstantin Shalygin <k0ste@k0ste.ru> wrote:
On 2/26/20 3:40 AM, shubjero wrote:
I'm running a Ceph Mimic cluster 13.2.6 and we use the ceph-balancer in upmap mode. This cluster is fairly old and pre-Mimic we used to set osd reweights to balance the standard deviation of the cluster. Since moving to Mimic about 9 months ago I enabled the ceph-balancer with upmap mode and let it do its thing but I did not think about setting the previously modified reweights back to 1.00000 (not sure if this is fine or would have been a best practice?)
Does the ceph-balancer in upmap mode manage the osd reweight dynamically? Just wondering if I need to proactively go back and set all non 1.00000 reweights to 1.00000.
Balancer in upmap mode should always work on not reweighed (e.g. 1.0000) OSD's.
k