Re: [ceph-users] Large directory block size on XFS may be harmful

2016-02-18 Thread Dan van der Ster
On Thu, Feb 18, 2016 at 3:46 PM, Jens Rosenboom wrote: > 2016-02-18 15:10 GMT+01:00 Dan van der Ster : >> Hi, >> >> Thanks for linking to a current update on this problem [1] [2]. I >> really hope that new Ceph installations aren't still following that >> old advice... it's been known to be a prob

Re: [ceph-users] Large directory block size on XFS may be harmful

2016-02-18 Thread Mark Nelson
FWIW, We still had a couple of example cbt configuration files in the github repo that used -n 64k until Jens pointed it out earlier this week. That's now been fixed, so that should at least help. Unfortunately there' still some old threads on the mailing list that list it as a potential perfo

Re: [ceph-users] Large directory block size on XFS may be harmful

2016-02-18 Thread Jens Rosenboom
2016-02-18 15:10 GMT+01:00 Dan van der Ster : > Hi, > > Thanks for linking to a current update on this problem [1] [2]. I > really hope that new Ceph installations aren't still following that > old advice... it's been known to be a problem for around a year and a > half [3]. > That said, the "-n si

Re: [ceph-users] Large directory block size on XFS may be harmful

2016-02-18 Thread Dan van der Ster
Hi, Thanks for linking to a current update on this problem [1] [2]. I really hope that new Ceph installations aren't still following that old advice... it's been known to be a problem for around a year and a half [3]. That said, the "-n size=64k" wisdom was really prevalent a few years ago, and I