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CTDB's system memory monitoring in 05.system.script monitors both main
memory and swap. The swap monitoring was originally based on
the (possibly incorrect, see below) idea that swap space stacks on top
of main memory, so that when a system starts filling swap space then
this is supposed to be a good sign that the system is running out of
memory. Additionally, performance on a Linux system tends to be
destroyed by the I/O associated with a lot of swapping to spinning
disks.
However, some platforms default to creating only 4GB of swap space
even when there is 128GB of main memory. With such a small swap to
main memory ratio, memory pressure can force swap to be nearly full
even when a significant amount of main memory is still available and
the system is performing well. This suggests that checking swap
utilisation might be less than useful in many circumstances.
So, remove the separate swap space checking and change the memory
check to cover the total of main memory and swap space.
Test function set_mem_usage() still takes an argument for each of main
memory and swap space utilisation. For simplicity, the same number is
now passed twice to make the intended results comprehensible. This
could be changed later.
A couple of tests are cleaned up to no longer use hard-coded
/proc/meminfo and ps output.
Signed-off-by: Martin Schwenke <martin@meltin.net>
Reviewed-by: Amitay Isaacs <amitay@gmail.com>
This provides finer resolution while still maintaining a reasonable
maximum. In this case the top bucket contains any hop counts
>= 16384, compared to the current situation where the top bucket contains
hop counts >= 268435456.
Signed-off-by: Martin Schwenke <martin@meltin.net>
Reviewed-by: Amitay Isaacs <amitay@gmail.com>
BUG: https://bugzilla.samba.org/show_bug.cgi?id=13610
Signed-off-by: Ralph Wuerthner <ralph.wuerthner@de.ibm.com>
Reviewed-by: Martin Schwenke <martin@meltin.net>
Reviewed-by: Ralph Böhme <slow@samba.org>
Autobuild-User(master): Martin Schwenke <martins@samba.org>
Autobuild-Date(master): Wed Sep 12 21:50:57 CEST 2018 on sn-devel-144
Use the "failover:disabled" option instead.
BUG: https://bugzilla.samba.org/show_bug.cgi?id=13589
Signed-off-by: Martin Schwenke <martin@meltin.net>
Reviewed-by: Amitay Isaacs <amitay@gmail.com>
This will become common, so will be useful to have support for.
BUG: https://bugzilla.samba.org/show_bug.cgi?id=13589
Signed-off-by: Martin Schwenke <martin@meltin.net>
Reviewed-by: Amitay Isaacs <amitay@gmail.com>
Negative options can be confusing, so switch to a positive option.
This was supposed to be done months ago but was forgotten.
BUG: https://bugzilla.samba.org/show_bug.cgi?id=13589
Signed-off-by: Martin Schwenke <martin@meltin.net>
Reviewed-by: Amitay Isaacs <amitay@gmail.com>
Values for ctdb.conf options are now returned by
get_ctdb_conf_option(). The main goal is to allow old boolean options
to be replaced by new logically negated options.
BUG: https://bugzilla.samba.org/show_bug.cgi?id=13589
Signed-off-by: Martin Schwenke <martin@meltin.net>
Reviewed-by: Amitay Isaacs <amitay@gmail.com>
This should never have been a user-level option, but some people used
it.
BUG: https://bugzilla.samba.org/show_bug.cgi?id=13589
Signed-off-by: Martin Schwenke <martin@meltin.net>
Reviewed-by: Amitay Isaacs <amitay@gmail.com>
Include an example ctdbd.conf-style file for testing.
BUG: https://bugzilla.samba.org/show_bug.cgi?id=13550
Signed-off-by: Martin Schwenke <martin@meltin.net>
Reviewed-by: Amitay Isaacs <amitay@gmail.com>
Autobuild-User(master): Martin Schwenke <martins@samba.org>
Autobuild-Date(master): Mon Jul 30 14:30:06 CEST 2018 on sn-devel-144
BUG: https://bugzilla.samba.org/show_bug.cgi?id=13546
Signed-off-by: Martin Schwenke <martin@meltin.net>
Reviewed-by: Amitay Isaacs <amitay@gmail.com>
Autobuild-User(master): Martin Schwenke <martins@samba.org>
Autobuild-Date(master): Sat Jul 28 07:26:24 CEST 2018 on sn-devel-144
It is incorrectly says that nodes not in the VNN map can not be
DMASTER.
BUG: https://bugzilla.samba.org/show_bug.cgi?id=13499
Signed-off-by: Martin Schwenke <martin@meltin.net>
Reviewed-by: Amitay Isaacs <amitay@gmail.com>
Drop function loadconfig(), replacing uses with "load_system_config
ctdb". Drop translation of old-style configuration to new
configuration file. Drop export of debugging variables. Drop
documentation and configuration examples.
Signed-off-by: Martin Schwenke <martin@meltin.net>
Reviewed-by: Amitay Isaacs <amitay@gmail.com>
Autobuild-User(master): Amitay Isaacs <amitay@samba.org>
Autobuild-Date(master): Thu May 17 07:03:04 CEST 2018 on sn-devel-144
Minor updates to other manual pages for compatibility.
Signed-off-by: Martin Schwenke <martin@meltin.net>
Reviewed-by: Amitay Isaacs <amitay@gmail.com>
This documents the new Samba-style configuration file.
Signed-off-by: Martin Schwenke <martin@meltin.net>
Reviewed-by: Amitay Isaacs <amitay@gmail.com>
All except -i/--interactive. This remaining popt option is now neatly
wrapped to fit in 80 columns.
Signed-off-by: Martin Schwenke <martin@meltin.net>
Reviewed-by: Amitay Isaacs <amitay@gmail.com>
This must harken back to the days of yore when corrupt persistent
databases were an issue. We haven't seen this used. If CTDB fails to
start due to a corrupt persistent database then this database can be
removed by hand.
Signed-off-by: Martin Schwenke <martin@meltin.net>
Reviewed-by: Amitay Isaacs <amitay@gmail.com>
These should be done using features provided by the operating system.
Signed-off-by: Martin Schwenke <martin@meltin.net>
Reviewed-by: Amitay Isaacs <amitay@gmail.com>
Autobuild-User(master): Amitay Isaacs <amitay@samba.org>
Autobuild-Date(master): Sat May 12 09:13:28 CEST 2018 on sn-devel-144
The existing configuration file is disappearing so these configuration
options need a new home that is not handled by ctdbd_wrapper.
Signed-off-by: Martin Schwenke <martin@meltin.net>
Reviewed-by: Amitay Isaacs <amitay@gmail.com>
Just document that NAT gateway and LVS are not compatible with this
option. Update the documentation to make it clear that this is a
10.interface option.
Signed-off-by: Martin Schwenke <martin@meltin.net>
Reviewed-by: Amitay Isaacs <amitay@gmail.com>
CTDB has no business mounting filesystems. Instead, documentation
for the new configuration system will include a recommendation that a
tmpfs be mounted on the volatile database directory.
Signed-off-by: Martin Schwenke <martin@meltin.net>
Reviewed-by: Amitay Isaacs <amitay@gmail.com>
Volatile databases now have their own subdirectory. This makes things
easier if we later recommend mounting a tmpfs on the volatile database
directory, rather than supporting the current CTDB_DBDIR=tmpfs magic.
No need to create database directories for local daemon tests. ctdbd
will do that.
Signed-off-by: Martin Schwenke <martin@meltin.net>
Reviewed-by: Amitay Isaacs <amitay@gmail.com>
Test options do not belong in the user documentation. Move them to
the README file in the tests/ subdirectory.
Signed-off-by: Martin Schwenke <martin@meltin.net>
Reviewed-by: Amitay Isaacs <amitay@gmail.com>
These haven't been used by anyone in a long time. --valgrinding is
less use with CTDB_VALGRINDING now gone.
Signed-off-by: Martin Schwenke <martin@meltin.net>
Reviewed-by: Amitay Isaacs <amitay@gmail.com>
This is too inflexible for general use. There is no use finding a new
home for this in the new configuration scheme.
Signed-off-by: Martin Schwenke <martin@meltin.net>
Reviewed-by: Amitay Isaacs <amitay@gmail.com>
Notification scripts are installed into $CTDB_BASE/notify.d/ and are
always run by notify.sh. Leave notify.sh where it is for now but no
longer consider it a configuration file. This is an interim measure
and will be changed again soon.
Signed-off-by: Martin Schwenke <martin@meltin.net>
Reviewed-by: Amitay Isaacs <amitay@gmail.com>
These aren't test options so improve their visibility.
Signed-off-by: Martin Schwenke <martin@meltin.net>
Reviewed-by: Amitay Isaacs <amitay@gmail.com>
ctdbd -i might be useful with systemd or similar, so should be
documented.
--nosetsched and --script-log-level options are valid user-level
options.
Signed-off-by: Martin Schwenke <martin@meltin.net>
Reviewed-by: Amitay Isaacs <amitay@gmail.com>
This is not used.
Signed-off-by: Martin Schwenke <martin@meltin.net>
Reviewed-by: Amitay Isaacs <amitay@gmail.com>
Autobuild-User(master): Amitay Isaacs <amitay@samba.org>
Autobuild-Date(master): Fri Apr 27 09:37:49 CEST 2018 on sn-devel-144
This was recently removed but the documentation was forgotten.
Signed-off-by: Martin Schwenke <martin@meltin.net>
Reviewed-by: Amitay Isaacs <amitay@gmail.com>
Recently removed but documentation change was forgotten.
Signed-off-by: Martin Schwenke <martin@meltin.net>
Reviewed-by: Amitay Isaacs <amitay@gmail.com>
CTDB_BASE should only ever be modified by test code. It should not be
mentioned in the user documentation.
Signed-off-by: Martin Schwenke <martin@meltin.net>
Reviewed-by: Amitay Isaacs <amitay@gmail.com>
Using CTDB_SET_TunableVariables in the main configuration file is no
longer supported.
The only subtlety is an unexpected order change in one of the unit
test results. This is because the old implementation implicitly
sorted the tunable variables via the set command.
Signed-off-by: Martin Schwenke <martin@meltin.net>
Reviewed-by: Amitay Isaacs <amitay@gmail.com>
Clarify that the global options should be set in the system
configuration file.
Signed-off-by: Martin Schwenke <martin@meltin.net>
Reviewed-by: Amitay Isaacs <amitay@gmail.com>
