Hi Alex, Switch autoscaler to 'scale-up' profile, it will keep PGs at minimum and increase them as required. Default one is 'scale-down'. Regards, Yury. On Tue, Nov 2, 2021 at 3:31 AM Alex Petty <pettyalex@xxxxxxxxx> wrote: > Hello, > > I’m evaluating Ceph as a storage option, using ceph version 16.2.6, > Pacific stable installed using cephadm. I was hoping to use PG autoscaling > to reduce ops efforts. I’m standing this up on a cluster with 96 OSDs > across 9 hosts. > > The device_health_metrics pool was created by Ceph automatically once I > started adding OSD and created with 2048 PGs. This seems high, and put > many PGs on each OSD. Documentation indicates that I should be targeting > around 100 PGs per OSD, is that guideline out of date? > > Also, when I created a pool to test erasure coded with a 6+2 config for > CephFS with PG autoscaling enabled, it was created with 1PG to start, and > didn’t scale up even as I loaded test data onto it, giving the entire > CephFS the write performance of 1 single disk as it was only writing to 1 > disk and backfilling to 7 others. Should I be manually setting default PGs > at a sane level (512, 1024) or will autoscaling size this pool up? I have > never seen any output from ceph osd pool autoscale-status when I am trying > to see autoscaling information. > > I’d appreciate some guidance about configuring PGs on Pacific. > > Thanks, > > Alex > _______________________________________________ > ceph-users mailing list -- ceph-users@xxxxxxx > To unsubscribe send an email to ceph-users-leave@xxxxxxx > _______________________________________________ ceph-users mailing list -- ceph-users@xxxxxxx To unsubscribe send an email to ceph-users-leave@xxxxxxx
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