Thomas Schoebel-Theuer
feb0b34604
marsadm: fix irritating "Inconsistent" display at primary side
...
At an actual primary, "Inconsistent" would be the correct description
for the state of the _disk_.
However most sysadmins will confuse this with the state of the
_replication_ (which is of course never inconsistent during
writeback from the memory buffer).
Although documented correctly, misunderstandings continue
to survive, because humans are automatically abstracting away
from detail components such as a "disk", and are automatically
assuming that "marsadm view" would relate to the replication
as a whole.
Avoid misunderstandings by more detailed message distinctions
aiming to address all of these in parallel.
2016-01-15 17:58:30 +01:00
Thomas Schoebel-Theuer
cd122db700
marsadm: display logfile replay errors in diskstate
2016-01-15 17:58:27 +01:00
Thomas Schoebel-Theuer
cc1074fc53
marsadm: add primitive macro errno-text
2016-01-15 17:29:47 +01:00
Thomas Schoebel-Theuer
6c41326f7a
marsadm: add basic macro replay-code
2016-01-15 17:23:14 +01:00
Thomas Schoebel-Theuer
496e57e1e1
logger: add new indicator for damaged logfiles
2016-01-15 17:10:58 +01:00
Thomas Schoebel-Theuer
cc1d786654
marsadm: disallow ordinary switching when logfiles are damaged
...
Only primary --force should be possible in such a (rare) case.
2016-01-15 17:10:48 +01:00
Thomas Schoebel-Theuer
d67336420d
light: fix becoming primary when logfiles are damaged
...
When logfile replay aborts with an error, becoming primary would be
impossible.
Without this, repair would be only possible by complete destruction
of the resource.
A previous version of this patch introduced
/proc/sys/mars/allow_primary_when_damaged which would complicate
the sysadmin interface. People would be unsure what to do.
2016-01-13 14:12:02 +01:00
Thomas Schoebel-Theuer
69386b33d9
marsadm: fix /mars security issues
...
Only relevant for non-storage servers where customers have access to.
Notice that /mars is a _reserved_ filesystem for MARS-internal purposes.
It has mothing to do with an ordinary filesystem.
Users have generally to be kept out.
2016-01-13 14:12:00 +01:00
Thomas Schoebel-Theuer
5ddc0b8991
all: release light0.1stable21
2016-01-02 10:50:43 +01:00
Thomas Schoebel-Theuer
3eedff125d
infra: fix comparison
...
Under weird circumstances, when a new symlink contents was just a
shortened version (prefix) of the old one, the symlink was not updated.
2016-01-02 10:18:33 +01:00
Thomas Schoebel-Theuer
d18c60f232
infra: fix potential fault
...
Very old idiotic bug.
Under some circumstances, a byte beyond the end of a non-null-terminated
string (such as produced by the VFS) might be read, potentially leading
to a page fault just one byte after a page border.
2016-01-02 10:18:33 +01:00
Thomas Schoebel-Theuer
25d954051b
logger: move ranking array from stack to brick instance
...
Don't allocate this on the stack, it might grow too big in future.
Reduces the risk of stack overflows (not observed until now, but
suspected).
2016-01-02 10:18:22 +01:00
Thomas Schoebel-Theuer
045d0e0356
logger: fix potential deadlock caused by incorrect accounting
...
Never observed in practice, found by testing with kernel upstream
versions.
2016-01-02 09:43:22 +01:00
Thomas Schoebel-Theuer
2b478a13e2
all: release light0.1stable20
2015-10-20 10:21:22 +02:00
Thomas Schoebel-Theuer
6ec43f63d0
doc: add Froscon2015 slides
2015-10-20 09:41:40 +02:00
Thomas Schoebel-Theuer
c1ee80f9f4
server: fix memory leak on writes
...
This was unnoticed for a long time because it simply did not occur
in ordinary MARS Light workloads.
2015-10-19 07:24:20 +02:00
Thomas Schoebel-Theuer
ccb5021e0f
all: release light0.1stable19
2015-10-08 07:53:23 +02:00
Thomas Schoebel-Theuer
b726dc44ac
doc: update version
2015-10-08 07:53:23 +02:00
Thomas Schoebel-Theuer
8f92f50799
doc: add quick table DRBD vs MARS
2015-10-08 07:52:37 +02:00
Thomas Schoebel-Theuer
54d8433b21
light: fix spelling
2015-10-07 10:46:04 +02:00
Thomas Schoebel-Theuer
4d8dc3a619
logger: fix spelling
2015-10-07 10:45:51 +02:00
Thomas Schoebel-Theuer
af6ac736c5
if: fix wrong error code ENOSYS
2015-10-07 10:44:44 +02:00
Thomas Schoebel-Theuer
66d200dbf1
infra: fix wrong error code ENOSYS
2015-10-07 10:44:35 +02:00
Thomas Schoebel-Theuer
96bbb42771
contrib: speedup mars_check.sh
2015-10-07 10:42:18 +02:00
Thomas Schoebel-Theuer
9d8dbe9181
contrib: speedup mars_check
2015-10-07 10:42:18 +02:00
Thomas Schoebel-Theuer
3a543d5ca5
marsadm: improve weird --host=other deletion
2015-10-07 10:42:07 +02:00
Thomas Schoebel-Theuer
224ad9f95f
all: release light0.1stable18
2015-08-05 10:41:16 +02:00
Thomas Schoebel-Theuer
e534d9ed7e
doc: update version
2015-08-05 10:18:33 +02:00
Thomas Schoebel-Theuer
f82d19c4ae
doc: describe logrotate intervals
2015-08-05 10:17:47 +02:00
Thomas Schoebel-Theuer
1c424148dc
doc: simplify emergency mode
2015-08-05 07:51:14 +02:00
Thomas Schoebel-Theuer
4eb7df274c
doc: simplify split-brain resolution
...
marsadm invalidate is long-proven and the simplest method.
Move the complicated alternative methods to the appendix.
2015-08-04 15:02:25 +02:00
Thomas Schoebel-Theuer
60b6b56604
doc: simplify primary switching
...
Some caveats are no longer necessary: becoming primary --force
during split brain works for a long time, and has been tested
numerous times already.
2015-08-04 14:18:45 +02:00
Thomas Schoebel-Theuer
8e786d129f
marsadm: remove distracting warning
...
This is no longer needed.
2015-08-04 14:18:45 +02:00
Thomas Schoebel-Theuer
58294defe5
marsadm: safeguard {create,join}-resource against old remains
2015-08-04 10:21:32 +02:00
Thomas Schoebel-Theuer
3e92223e47
marsadm: fix annoying warning in corner case
2015-07-22 12:19:41 +02:00
Thomas Schoebel-Theuer
cbd7cac4ad
all: release light0.1stable17
2015-07-15 11:07:12 +02:00
Thomas Schoebel-Theuer
c6235c71d5
aio: fix race on shutdown
2015-07-15 10:38:49 +02:00
Thomas Schoebel-Theuer
550d02935e
sio: fix race on shutdown
2015-07-15 10:38:49 +02:00
Thomas Schoebel-Theuer
91f458fe66
sio: convert to new mapfree infrastructure
2015-07-15 10:38:49 +02:00
Thomas Schoebel-Theuer
6d8bd64b7a
all: release light0.1stable16
2015-06-22 08:55:16 +02:00
Thomas Schoebel-Theuer
146d5151de
doc: update to version 0.23
2015-06-22 08:55:10 +02:00
Thomas Schoebel-Theuer
8d2d119414
doc: new section on clustermanagers
2015-06-22 08:54:36 +02:00
Thomas Schoebel-Theuer
034c2f637e
contrib: example script for checking static consistency
2015-06-18 12:17:22 +02:00
Thomas Schoebel-Theuer
81ac96bdbf
contrib: example script for checking whether automated switch is
...
possible
2015-06-18 12:17:22 +02:00
Thomas Schoebel-Theuer
e23f0c35f9
contrib: configurable Nagios checks
2015-06-18 12:17:17 +02:00
Thomas Schoebel-Theuer
c39a2988b7
light: fix long-lasting switchoff at end of sync
2015-06-17 11:33:27 +02:00
Thomas Schoebel-Theuer
4ecd6937c7
light: don't try fetching from (none)
2015-06-17 11:33:27 +02:00
Thomas Schoebel-Theuer
6eb5cefc19
infra: clean buffer cache on opening block devices
2015-06-17 11:33:18 +02:00
Thomas Schoebel-Theuer
6aede1fc62
all: release light0.1stable15
2015-05-06 13:35:00 +02:00
Thomas Schoebel-Theuer
d2c31a6343
doc: update
2015-05-06 07:50:10 +02:00
