[Gluster-devel] Interesting profile data on tests

[Raghavendra Talur]

This is not comprehensive data but some interesting bits

Average time taken for various commands in our .t files.

* glusterd - 2 second
* gluster vol start/stop - 3 second
* gluster vol set/info(any basic gluster cli command) -1 second
* gluster mount - 2 second
* gluster add brick - 2 second
* gluster remove brick - 5 second
* gluster rebalance start 5 second
* gluster tier attach/detach - 6 second

The only other single command which takes 1+ second is sleep. Most of the
other
external commands we use in bash scripts are not that time taking.


Hence,

1. Don't stop/delete a gluster volume in .t file unless it is part of your
test. Let the cleanup function handle that.
2. Don't call gluster vol info at the start of the test if not required
3. Merge as many tests as possible to reduce glusterd starts/vol starts and
mounts.
4. Use sleep only if it is absolutely required.

You can use this bug https://bugzilla.redhat.com/show_bug.cgi?id=1294826 to
send patches to improve test times.


Thanks,
Raghavendra Talur
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