Re: [ceph-users] xattrs vs. omap with radosgw

2015-06-17 Thread Nathan Cutler
We've since merged something that stripes over several small xattrs so that we can keep things inline, but it hasn't been backported to hammer yet. See c6cdb4081e366f471b372102905a1192910ab2da. Hi Sage: You wrote yet - should we earmark it for hammer backport? Nathan

Re: [ceph-users] xattrs vs. omap with radosgw

2015-06-17 Thread Abhishek L
On Wed, Jun 17, 2015 at 1:02 PM, Nathan Cutler ncut...@suse.cz wrote: We've since merged something that stripes over several small xattrs so that we can keep things inline, but it hasn't been backported to hammer yet. See c6cdb4081e366f471b372102905a1192910ab2da. Hi Sage: You wrote yet -

Re: [ceph-users] xattrs vs. omap with radosgw

2015-06-17 Thread Sage Weil
On Wed, 17 Jun 2015, Nathan Cutler wrote: We've since merged something that stripes over several small xattrs so that we can keep things inline, but it hasn't been backported to hammer yet. See c6cdb4081e366f471b372102905a1192910ab2da. Hi Sage: You wrote yet - should we earmark it

Re: [ceph-users] xattrs vs. omap with radosgw

2015-06-16 Thread Somnath Roy
Guang, Try to play around with the following conf attributes specially filestore_max_inline_xattr_size and filestore_max_inline_xattrs // Use omap for xattrs for attrs over // filestore_max_inline_xattr_size or OPTION(filestore_max_inline_xattr_size, OPT_U32, 0) //Override

Re: [ceph-users] xattrs vs. omap with radosgw

2015-06-16 Thread Sage Weil
On Wed, 17 Jun 2015, Zhou, Yuan wrote: FWIW, there was some discussion in OpenStack Swift and their performance tests showed 255 is not the best in recent XFS. They decided to use large xattr boundary size(65535). https://gist.github.com/smerritt/5e7e650abaa20599ff34 If I read this

Re: [ceph-users] xattrs vs. omap with radosgw

2015-06-16 Thread GuangYang
After back-porting Sage's patch to Giant, with radosgw, the xattrs can get inline. I haven't run extensive testing yet, will update once I have some performance data to share. Thanks, Guang Date: Tue, 16 Jun 2015 15:51:44 -0500 From: mnel...@redhat.com To: yguan...@outlook.com;

Re: [ceph-users] xattrs vs. omap with radosgw

2015-06-16 Thread GuangYang
Hi Yuan, Thanks for sharing the link, it is interesting to read. My understanding of the test results, is that with a fixed size of xattrs, using smaller stripe size will incur larger latency for read, which kind of makes sense since there are more k-v pairs, and with the size, it needs to get