Re: a patch to improve cephfs direct io performance

2015-10-08 Thread Yan, Zheng
On Wed, Sep 30, 2015 at 5:40 PM, zhucaifeng wrote: > Hi, Yan > > iov_iter APIs seems unsuitable for the direct io manipulation below. > iov_iter APIs > hide how to iterate over elements, whileas dio_xxx below explicitly control > over > the iteration. They conflict

Re: [ceph-users] O_DIRECT on deep-scrub read

2015-10-08 Thread Paweł Sadowski
On 10/07/2015 10:52 PM, Sage Weil wrote: > On Wed, 7 Oct 2015, David Zafman wrote: >> There would be a benefit to doing fadvise POSIX_FADV_DONTNEED after >> deep-scrub reads for objects not recently accessed by clients. > Yeah, it's the 'except for stuff already in cache' part that we don't do >

RE: perf counters from a performance discrepancy

2015-10-08 Thread Deneau, Tom
> -Original Message- > From: Sage Weil [mailto:sw...@redhat.com] > Sent: Wednesday, October 07, 2015 9:48 PM > To: Deneau, Tom > Cc: Mark Nelson; Gregory Farnum; ceph-devel@vger.kernel.org > Subject: RE: perf counters from a performance discrepancy > > > I finally got around to looking

RE: perf counters from a performance discrepancy

2015-10-08 Thread Sage Weil
On Thu, 8 Oct 2015, Deneau, Tom wrote: > > -Original Message- > > From: Sage Weil [mailto:sw...@redhat.com] > > Sent: Wednesday, October 07, 2015 9:48 PM > > To: Deneau, Tom > > Cc: Mark Nelson; Gregory Farnum; ceph-devel@vger.kernel.org > > Subject: RE: perf counters from a performance

The questions of data collection and cache tiering in Ceph

2015-10-08 Thread 蔡毅
Dear developers,    Recently I met some troubles when I read the Ceph’s source code and understand the architecture. The details of problems are as followed. 1.In monitoring tools, they can collect much data when Ceph runs. I wonder what kind of data the Ceph can provide (object data, PG

RE: perf counters from a performance discrepancy

2015-10-08 Thread Somnath Roy
If I remember correctly, Nick faced similar issue and we debugged down to the xattr access issue in the find_object_context(). I am not sure if it is resolved though for him or not. Thanks & Regards Somnath -Original Message- From: ceph-devel-ow...@vger.kernel.org

Re: CephFS and the next hammer release v0.94.4

2015-10-08 Thread Loic Dachary
On 08/10/2015 22:50, Gregory Farnum wrote: > On Tue, Oct 6, 2015 at 8:16 AM, Loic Dachary wrote: >> Hi Greg, >> >> The next hammer release as found at https://github.com/ceph/ceph/tree/hammer >> passed the fs suite (http://tracker.ceph.com/issues/12701#note-66). Do you >>

Re: CephFS and the next hammer release v0.94.4

2015-10-08 Thread Gregory Farnum
On Tue, Oct 6, 2015 at 8:16 AM, Loic Dachary wrote: > Hi Greg, > > The next hammer release as found at https://github.com/ceph/ceph/tree/hammer > passed the fs suite (http://tracker.ceph.com/issues/12701#note-66). Do you > think the hammer branch is ready for QE to start their

Re: [ceph-users] Potential OSD deadlock?

2015-10-08 Thread Robert LeBlanc
-BEGIN PGP SIGNED MESSAGE- Hash: SHA256 Sage, After trying to bisect this issue (all test moved the bisect towards Infernalis) and eventually testing the Infernalis branch again, it looks like the problem still exists although it is handled a tad better in Infernalis. I'm going to test

Re: The questions of data collection and cache tiering in Ceph

2015-10-08 Thread Gregory Farnum
On Thu, Oct 8, 2015 at 9:09 AM, 蔡毅 wrote: > > Dear developers, > >Recently I met some troubles when I read the Ceph’s source code and > understand the architecture. > The details of problems are as followed. > >1.In monitoring tools, they can collect much data when