Re: [ceph-users] Speeding up backfill after increasing PGs and or adding OSDs

2017-07-07 Thread george.vasilakakos
stian Balzer [ch...@gol.com] Sent: 07 July 2017 01:46 To: ceph-users@lists.ceph.com Cc: Vasilakakos, George (STFC,RAL,SC) Subject: Re: [ceph-users] Speeding up backfill after increasing PGs and or adding OSDs Hello, On Thu, 6 Jul 2017 17:57:06 + george.vasilaka...@stfc.ac.uk wrote: > Thanks

Re: [ceph-users] Speeding up backfill after increasing PGs and or adding OSDs

2017-07-06 Thread Christian Balzer
> George > > ____________ > From: David Turner [drakonst...@gmail.com] > Sent: 06 July 2017 16:08 > To: Vasilakakos, George (STFC,RAL,SC); ceph-users@lists.ceph.com > Subject: Re: [ceph-users] Speeding up backfill after increasing PGs and or > adding O

Re: [ceph-users] Speeding up backfill after increasing PGs and or adding OSDs

2017-07-06 Thread David Turner
___ > From: David Turner [drakonst...@gmail.com] > Sent: 06 July 2017 16:08 > To: Vasilakakos, George (STFC,RAL,SC); ceph-users@lists.ceph.com > Subject: Re: [ceph-users] Speeding up backfill after increasing PGs and or > adding OSDs > > Just a quick place to start is

Re: [ceph-users] Speeding up backfill after increasing PGs and or adding OSDs

2017-07-06 Thread george.vasilakakos
others? What about noscrub? Best regards, George From: David Turner [drakonst...@gmail.com] Sent: 06 July 2017 16:08 To: Vasilakakos, George (STFC,RAL,SC); ceph-users@lists.ceph.com Subject: Re: [ceph-users] Speeding up backfill after increasing PGs and or adding OSDs Just a quick place to

Re: [ceph-users] Speeding up backfill after increasing PGs and or adding OSDs

2017-07-06 Thread David Turner
Just a quick place to start is osd_max_backfills. You have this set to 1. Each PG is on 11 OSDs. When you have a PG moving, it is on the original 11 OSDs and the new X number of OSDs that it is going to. For each of your PGs that is moving, an OSD can only move 1 at a time (your osd_max_backfill