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* debug/io-stats: Add FOP sampling featureRichard Wareing2015-11-011-0/+9
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Summary: - Using sampling feature you can record details about every Nth FOP. The fields in each sample are: FOP type, hostname, uid, gid, FOP priority, port and time taken (latency) to fufill the request. - Implemented using a ring buffer which is not (m/c) allocated in the IO path, this should make the sampling process pretty cheap. - DNS resolution done @ dump time not @ sample time for performance w/ cache - Metrics can be used for both diagnostics, traffic/IO profiling as well as P95/P99 calculations - To control this feature there are two new volume options: diagnostics.fop-sample-interval - The sampling interval, e.g. 1 means sample every FOP, 100 means sample every 100th FOP diagnostics.fop-sample-buf-size - The size (in bytes) of the ring buffer used to store the samples. In the even more samples are collected in the stats dump interval than can be held in this buffer, the oldest samples shall be discarded. Samples are stored in the log directory under /var/log/glusterfs/samples. - Uses DNS cache written by sshreyas@fb.com (Thank-you!), the DNS cache TTL is controlled by the diagnostics.stats-dnscache-ttl-sec option and defaults to 24hrs. Test Plan: - Valgrind'd to ensure it's leak free - Run prove test(s) - Shadow testing on 100+ brick cluster Change-Id: I9ee14c2fa18486b7efb38e59f70687249d3f96d8 BUG: 1271310 Signed-off-by: Jeff Darcy <jdarcy@redhat.com> Reviewed-on: http://review.gluster.org/12210 Tested-by: Gluster Build System <jenkins@build.gluster.com> Reviewed-by: Vijay Bellur <vbellur@redhat.com>
* logrotate: gluster logrotate config should not be globalLalatendu Mohanty2014-10-291-11/+12
| | | | | | | | | | | | | Issue : Previously glusterfs logrotate config file pollutes global config. So moved the directives inside the curly braces, so they don't pollute the global config state. Change-Id: I8836893dfcdf457d9c5d766612d687bfce64e2ae BUG: 1126802 Signed-off-by: Lalatendu Mohanty <lmohanty@redhat.com> Reviewed-on: http://review.gluster.org/8994 Reviewed-by: Niels de Vos <ndevos@redhat.com> Tested-by: Gluster Build System <jenkins@build.gluster.com>
* add 'logrotate' config file to the packageAmar Tumballi2011-05-041-0/+27
Signed-off-by: Amar Tumballi <amar@gluster.com> Signed-off-by: Anand Avati <avati@gluster.com> BUG: 2053 (We need to support the standard *nix 'logrotate' for server and client log files.) URL: http://bugs.gluster.com/cgi-bin/bugzilla3/show_bug.cgi?id=2053