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It wouldn't make sense to allow iostats file to be written in
*any* directory. While the formating makes sure we try to append
io-stats-name for the file, so overwriting existing file is slim,
but in any case it makes sense to restrict dumping to one directory.
Below are the sample commands, and files created for the corresponding
values:
$ setfattr -n trusted.io-stats-dump -v file-for-dump $M0
In this case, the file would be in /var/run/gluster/file-for-dump
$ setfattr -n trusted.io-stats-dump -v /dir1/dir2/file-for-dump $M0
In this case, then the dump file is in /var/run/gluster/dir1-dir2-file-for-dump
Note that the value passed for this virtual xattr would be treated as a
file, and even if the value has '/' in it, it would be changed to '-'
for sanity.
Fixes: bz#1625106
Change-Id: Id9ae6a40a190b8937c51662e6e1c2a0f6c86a0e0
Signed-off-by: Amar Tumballi <amarts@redhat.com>
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Previous commit to fix the bug, where io-stat-dump was overwriting
the dump file when the client and a brick was on the same host,
failed to consider the existing behaviour where io-stats can
help generate closely correlated set of stats across clients
and bricks, by triggering the dump using the same command.
This was introduced in commit:
0facb11220aea20a6573b656785922219c9650cf
Further, by limiting the first io-stat to unwind the dump request,
there is no way to trigger other io-stat xlators in the stack to
dump their stat information.
This bug hence is being fixed by this commit keeping the
following in mind,
- We need to trigger io-stat-dump for all instances in the
graph when this attr is set
- We need to write the output to different files, so that
they do not overwrite each others data
- We need to prevent this xattr from being set on the path
that is used to trigger the io-stat-dump information
Change-Id: I31ec380f0d85e10313a9d7b977da0e1ec74638a6
BUG: 1322825
Signed-off-by: Shyam <srangana@redhat.com>
Reviewed-on: http://review.gluster.org/14552
Smoke: Gluster Build System <jenkins@build.gluster.org>
NetBSD-regression: NetBSD Build System <jenkins@build.gluster.org>
Reviewed-by: Ravishankar N <ravishankar@redhat.com>
CentOS-regression: Gluster Build System <jenkins@build.gluster.org>
Reviewed-by: Jeff Darcy <jdarcy@redhat.com>
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Issue: When the user executes the following command to generate
the client perf profile, if the client is on the same node as
bricks, the bricks overwrite the profile info written by clients.
Also xattr "trusted.io-stats-dump" gets set on the mount point.
setxattr -n trusted.io-stats-dump -v /tmp/iostat.log /mnt/fuse
Fix: Unwind from setxattr, when xattr is 'io-stats-dump'
Change-Id: Iba0e5df2f25f4ba3b1399ac176a3f8a916ff372e
BUG: 1322825
Signed-off-by: Poornima G <pgurusid@redhat.com>
Reviewed-on: http://review.gluster.org/13872
NetBSD-regression: NetBSD Build System <jenkins@build.gluster.org>
CentOS-regression: Gluster Build System <jenkins@build.gluster.com>
Reviewed-by: Ravishankar N <ravishankar@redhat.com>
Smoke: Gluster Build System <jenkins@build.gluster.com>
Reviewed-by: Jeff Darcy <jdarcy@redhat.com>
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