glusterfs.git/tests/bugs/replicate/bug-977797.t, branch v3.8.1

afr:Don't wind reads for files in metadata split-brain

2016-06-27T12:19:55+00:00

Backport of http://review.gluster.org/#/c/13389/

Problem: For a read on  a file in metadata split-brain:
1.lookup_done resets event_generation to zero.
2. readv is issued, goes to inode refresh due to mismatching event_gen.
3. After refresh is successful, we update event_generation, data and
metdata readable.
3. We then call afr_read_txn_refresh_done() which in turn calls
afr_inode_get_readable() but doesn't check for EIO. So afr_readv_wind
is called with local->readable (which is populated with data_readable),
thus winding the read to a brick.
4. Also, further parallel reads that come directly go to the wind path
because there is no inode_refresh needed.

Fix:
1.For any afr_read_txn(), readable must be an intersection of data and metadata
readable.
2.Check for EIO in afr_read_txn_refresh_done().

Change-Id: I22dd221fdfaf96d7aced2f474e28ed1337d69f0e
BUG: 1349879
Signed-off-by: Ravishankar N 
(cherry picked from commit 7a1c1e2904701496968ed14b6d7479fb706c3188)
Reviewed-on: http://review.gluster.org/14790
Smoke: Gluster Build System 
NetBSD-regression: NetBSD Build System 
CentOS-regression: Gluster Build System 
Reviewed-by: Pranith Kumar Karampuri

afr: Add throttled background client-side heals

2016-03-01T11:23:20+00:00

If a heal is needed after inode refresh (lookup, read_txn), launch it in
the background instead of blocking the fop (that triggered refresh) until the
heal happens.

afr_replies_interpret() is modified such that the heal is
launched only if atleast one sink brick is up.

Max. no of heals that can happen in parallel is configurable via the
'background-self-heal-count' volume option. Any number greater than that
is put in a wait queue whose length is configurable via
'heal-wait-queue-leng' volume option. If the wait queue is also full,
further heals will be ignored.

Default values:  background-self-heal-count=8, heal-wait-queue-leng=128

Change-Id: I1d4a52814cdfd43d90591b6d2ad7b6219937ce70
BUG: 1297172
Signed-off-by: Ravishankar N 
Reviewed-on: http://review.gluster.org/13207
Smoke: Gluster Build System 
CentOS-regression: Gluster Build System 
Reviewed-by: Pranith Kumar Karampuri 
Tested-by: Pranith Kumar Karampuri 
NetBSD-regression: NetBSD Build System

tests: move all test-cases into component subdirectories

2015-01-06T11:24:24+00:00

There are around 300 regression tests, 250 being in tests/bugs. Running
partial set of tests/bugs is not easy because this is a flat directory
with almost all tests inside.

It would be valuable to make partial test/bugs easier, and allow the use
of mulitple build hosts for a single commit, each running a subset of
the tests for a quicker result.

Additional changes made:
- correct the include path for *.rc shell libraries and *.py utils
- make the testcases pass checkpatch
- arequal-checksum in afr/self-heal.t was never executed, now it is
- include.rc now complains loudly if it fails to find env.rc

Change-Id: I26ffd067e9853d3be1fd63b2f37d8aa0fd1b4fea
BUG: 1178685
Reported-by: Emmanuel Dreyfus 
Reported-by: Atin Mukherjee 
URL: http://www.gluster.org/pipermail/gluster-devel/2014-December/043414.html
Signed-off-by: Niels de Vos 
Reviewed-on: http://review.gluster.org/9353
Reviewed-by: Kaleb KEITHLEY 
Reviewed-by: Emmanuel Dreyfus 
Tested-by: Gluster Build System 
Reviewed-by: Vijay Bellur