Thomas Schoebel-Theuer
c9bb358239
aio: improve debugging
2013-07-10 07:16:19 +02:00
Thomas Schoebel-Theuer
764d5ed7d8
infra: fix reference counter in lib_mapfree
2013-07-09 18:50:18 +02:00
Thomas Schoebel-Theuer
acd9b194aa
light: add syncpos symlink
...
This is needed for detection of the real end of inconsistencies
after sync as finished. Consistency is only (re-)reached after
a certain amount of logfile data has been sucessfully applied.
This patch remembers the replaylink from the primary at the time
when the sync has finished.
When at least that amount of logfile data has been applied, we
are certain that now we are consistent.
2013-07-08 10:55:58 +02:00
Thomas Schoebel-Theuer
ad08afe074
light: use replay_tolerance only after failed replay attempt
2013-07-08 10:47:33 +02:00
Frank Liepold
f38c56d5ab
light: primary is more tolerant against truncated logfile
2013-07-08 10:19:38 +02:00
Thomas Schoebel-Theuer
2351f54d6f
light: fix regression caused by tolerance
...
On the secondaries, switchover between logfiles could hang
when _check_logging_status() used the tolerance, but
is_switchover_possible() refused to switch over.
2013-07-05 14:35:11 +02:00
Thomas Schoebel-Theuer
156d493192
light: improve tolerance flexibility
2013-07-05 14:08:12 +02:00
Thomas Schoebel-Theuer
9a160c26ab
Kconfig: make MARS_SEPARATE_PORTS the default
2013-07-05 14:06:35 +02:00
Thomas Schoebel-Theuer
f75d402d0b
doc: add mars-manual.{lyx,pdf} (work in progress)
2013-07-04 10:23:08 +02:00
Frank Liepold
d01389e171
tests: add test suite (work in progress)
2013-07-04 10:22:39 +02:00
Thomas Schoebel-Theuer
637ec3fc4e
tools: new checking tool write-reboot.c
...
Use this for testing the power blackout safety.
2013-07-04 09:06:36 +02:00
Thomas Schoebel-Theuer
e6a39cf313
tools: add provisionary logfile import/export (HACKERS ONLY)
...
Use this for testing or for repair if you are extremely desperate.
This is not yet end-user friendly.
2013-07-04 09:06:36 +02:00
Thomas Schoebel-Theuer
9a104deb19
lib_log: fix length correction in the headers, cleanup
2013-07-04 08:51:36 +02:00
Thomas Schoebel-Theuer
82e7f1b823
lib_log: move log_scan() to header file
2013-07-04 08:46:14 +02:00
Thomas Schoebel-Theuer
295b0f4ada
marsadm: relax precondition for create-resource
2013-07-04 07:21:01 +02:00
Thomas Schoebel-Theuer
62e2f5944b
aio: finally fix race on dirty area at the end
2013-07-04 07:21:01 +02:00
Thomas Schoebel-Theuer
83b75845c3
aio: remove obsolete clever_sync
2013-07-04 07:21:01 +02:00
Thomas Schoebel-Theuer
d4338032bb
logger: make writeback more resilient
2013-07-04 07:21:01 +02:00
Thomas Schoebel-Theuer
e0d980223b
marsadm: wait-cluster has-device waits for actual device appearance
2013-07-04 07:21:01 +02:00
Thomas Schoebel-Theuer
0f4cc33d15
logger: make replay_timeout configurable
2013-07-04 07:21:01 +02:00
Thomas Schoebel-Theuer
45cac16cc1
infra: add grace freeing to mapfree
...
Avoid unnecessary LRUing of freeable buffers at the long term
(months) for better long-term performance.
2013-07-04 07:21:01 +02:00
Thomas Schoebel-Theuer
19f1a95a47
proc: allow some debugging even in production systems (default off)
2013-07-04 07:21:01 +02:00
Thomas Schoebel-Theuer
e33ddf63db
light: fix wrong condition in logfile update
2013-07-04 07:21:00 +02:00
Thomas Schoebel-Theuer
f3613177a2
aio: prefer fdatasync() over filemap_write_and_wait_range()
2013-07-04 07:21:00 +02:00
Thomas Schoebel-Theuer
be20dd422d
light: tolerate few incomplete log entries at the end when switching to primary
2013-07-04 07:21:00 +02:00
Thomas Schoebel-Theuer
bfb6070d25
logger: add replay_tolerance
2013-07-04 07:21:00 +02:00
Thomas Schoebel-Theuer
0ee23aa3ef
light: prevent remote symlink updates when delete is in progress
2013-07-04 07:21:00 +02:00
Thomas Schoebel-Theuer
269c53d565
marsadm: make 'wait-connect' an alias to 'wait-resource'
2013-07-04 07:21:00 +02:00
Thomas Schoebel-Theuer
228a464c8a
marsadm: mark "verify" as forbidden
...
It would be dangerous since DRBD semantics are not implemented.
2013-07-04 07:21:00 +02:00
Thomas Schoebel-Theuer
1d955d9bed
light: fix wrong target size of sync
2013-07-04 07:21:00 +02:00
Thomas Schoebel-Theuer
45f462026f
marsadm: fix leave-resource cleanup
...
Now the sequence leave-resource ; join-resource should work.
When the last member of the resource has gone and create-resource is
tried anew, there is a new saftey measure: the old resource directory
is left over deliberately, thus the new create-resource will deny creation
because some unreachable cluster node may have existed, such that we
didn't even know of its resource membership. This very special
case requires --force and some handwork cleanup.
2013-07-04 07:21:00 +02:00
Frank Liepold
62b016d4cc
marsadm: set syncstatus link on primary after marsadm resize
2013-07-04 07:21:00 +02:00
Thomas Schoebel-Theuer
3346daf959
light: allow remote deletion of directories
2013-06-29 21:15:18 +02:00
Thomas Schoebel-Theuer
c917bc239b
all: update pre-patches
2013-06-29 21:15:17 +02:00
Thomas Schoebel-Theuer
58e6ae23ad
light: workaround nasty race on kthread_stop()
2013-06-29 21:15:17 +02:00
Daniel Hermann
e0ed98eb14
marsadm: secondary waits until device has disappeared
...
Signed-off-by: Thomas Schoebel-Theuer <tst@1und1.de>
2013-06-29 21:15:17 +02:00
Thomas Schoebel-Theuer
eacc8361ae
doc: update README
2013-06-29 21:15:17 +02:00
Daniel Hermann
83b658467b
sio: fix call to vfs_fsync() for newest rhel6 kernels
...
the number of arguments to vfs_fsync has changed in kernel 2.6.35.
The S_BIAS macro (removed at about the same time in 2.6.35) is used to
detect whether vfs_fsync must be called with 2 or 3 args. In RHEL6
kernels 2.6.32, the removal of S_BIAS was backported, but the change
in vfs_fsync was not. So a check for RHEL_MAJOR < 7 is used in
addition to S_BIAS to find the correct number of args for vfs_fsync
call.
Signed-off-by: Thomas Schoebel-Theuer <tst@1und1.de>
2013-06-29 21:15:17 +02:00
Thomas Schoebel-Theuer
5b523f16f7
logger: avoid potential races between IO and symlink updates
2013-06-20 15:09:05 +02:00
Thomas Schoebel-Theuer
39ed143e27
logger: fix potential race on replay_end_pos
...
The variable should only be set from outside, e.g. mars_light.
This should also lead to more correct replay_code==2 results.
2013-06-20 15:09:05 +02:00
Thomas Schoebel-Theuer
fe54abb225
logger: update symlinks even at apply of incomplete logfiles
2013-06-20 15:08:48 +02:00
Thomas Schoebel-Theuer
fd39137cc9
marsadm: 'secondary' waits until device has disappeared
2013-06-20 15:08:28 +02:00
Thomas Schoebel-Theuer
15c76e9ffb
marsadm: check block device for exclusive access in {create,join}-resource
2013-06-20 15:08:28 +02:00
Thomas Schoebel-Theuer
84bb63ccc8
marsadm: remove potentially dangerous internal _create_cluster() call
2013-06-20 15:08:28 +02:00
Thomas Schoebel-Theuer
21a5d4160c
logger: disallow skipping of bad data
...
Be as conservative as possible.
Any copputed logfiles must be corrected in userspace.
2013-06-20 15:08:28 +02:00
Thomas Schoebel-Theuer
eec86bf1af
marsadm: create initial versionlink upon create-resource
2013-06-20 15:08:28 +02:00
Thomas Schoebel-Theuer
2fee24fe49
light: report is_primary at the end of the round
...
The old code led to ain unnecessary delay of 1 round.
2013-06-20 15:08:28 +02:00
Thomas Schoebel-Theuer
81ca278291
aio: fix race on file size
...
The old code used mf->mf_max for correcting the file size, but that
was wrong for multiple writes in flight.
A really correct solution would have to remember all in-flight writes
and compute their minimum IO position. Since that would be too
costly, we just use the old size before any writes have started.
This might be too conservative for extremely high load patterns
(possible starvation problem). For now, take this and check whether
we really need higher effort.
2013-06-20 15:08:28 +02:00
Thomas Schoebel-Theuer
e7edf0020e
marsadm: workaround race between create-resource and join-resource
2013-06-20 15:08:28 +02:00
Thomas Schoebel-Theuer
dab34fa2f6
marsadm: new command 'set-link'
2013-06-20 15:08:28 +02:00
