On Mon, 1 Aug 2011, Theodore Tso wrote:
> On Jul 31, 2011, at 4:42 PM, Sage Weil wrote:
>
> > This is link(2)
> >
> >> 2011-07-31 23:06:50.114316 7f23c048c700 filestore(/osd.0) collection_remove
> >> temp/10000000483.000005d6/head = 0
> >
> > This is unlink(2)
> >
> >> 2011-07-31 23:06:50.114384 7f23c048c700 filestore(/osd.0) setattrs
> >> 0.69_head/10000000483.000005d6/head '_' len 161 = 161
> >
> > The xattr names are prefixed with 'user.ceph.'
> >
> >> 2011-07-31 23:06:50.114406 7f23c048c700 filestore(/osd.0) setattrs
> >> 0.69_head/10000000483.000005d6/head 'snapset' len 26 = 26
> >> 2011-07-31 23:06:50.114413 7f23c048c700 filestore(/osd.0) setattrs
> >> 0.69_head/10000000483.000005d6/head = 26
> >
> > Does that tell you what to need, Ted?
>
> So let me make sure I understand what happened. Ceph made sure no file existed with this name, and created with the first write log entry:
>
> 2011-07-31 23:06:49.173941 7f23c048c700 filestore(/osd.0) write temp/10000000483.000005d6/head 0~1048576 = 1048576
The fd was actually closed here.
> It then linked it into this directory:
>
> 2011-07-31 23:06:50.114287 7f23c048c700 filestore(/osd.0) collection_add 0.69_head/10000000483.000005d6/head temp/10000000483.000005d6/head = 0
>
> ? and removed it from the temp directory:
>
> 2011-07-31 23:06:50.114316 7f23c048c700 filestore(/osd.0) collection_remove temp/10000000483.000005d6/head = 0
>
> and then created three inodes that totaled approximately 240 bytes in length or so (including the name and headers)
xattrs
>
> 2011-07-31 23:06:50.114384 7f23c048c700 filestore(/osd.0) setattrs 0.69_head/10000000483.000005d6/head '_' len 161 = 161
> 2011-07-31 23:06:50.114406 7f23c048c700 filestore(/osd.0) setattrs 0.69_head/10000000483.000005d6/head 'snapset' len 26 = 26
> 2011-07-31 23:06:50.114413 7f23c048c700 filestore(/osd.0) setattrs 0.69_head/10000000483.000005d6/head = 26
>
> ? and then presumably the file was closed and that would have been the
> end of this file being touched by ceph, correct?
Yep!
sage
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