Due to an include conflict between /usr/include/poll.h and
maxscale/server/include/poll.h the latter was moved to
maxscale/server/include/maxscale/poll.h.
Once 1.4 is out, all maxscale header files will be moved to that
same sub-directory. That will prevent include conflicts and also
make it easy to see which include files belong to maxscale and
which do not.
This will prevent the routing of queries that modify data to the slaves.
In the future a more intricate solution can done where all the statements
are parsed and the destination is resolved based on the actual contents.
Both the passwords and temporary files of the embedded library were stored
in the same directory. Now the directories are separated and the embedded
library uses the temporary directory. The datadir cleanup also now only
cleans up the temporary data directory.
The monitor timeouts can now be larger than the monitor interval. This will
allow the combination of low monitoring intervals and large network timeouts.
If a network experiences some periodic lag, it is desirable to allow large
timeout values.
The admin users are now encrypted with a more complex algorithm which reduces
the chance of two passwords generating the same hash by a significant amount.
Refer to the GNU libc manual for more details about the crypt function:
http://www.gnu.org/software/libc/manual/html_node/crypt.html
Slist removed from skygw_utils and added as a separate component.
Nobody seems to be using it, so it could also simply be removed.
Left in place for the time being.
The check for the server status explicitly denied servers that are both master
and slave from being chosed as candidates for queries. This is only a problem
when a user manually sets the server states to both master and slave.
The monitors resolve the replication topology based on the servers that
the monitors see and this always results in at least one slave server.
The polling statistics collection used atomic_add to increment values. This
is not an optimal way to update statistical values. Moved to per thread
values which are summed up when they are read.
Moved the functions used to gather polling statistics to their own file and
created a specific data type for statistics.
The THREAD type was not used everywhere and pthread_t was used instead.
The thread creation function also returned the address of a stack allocated
value which isn't guaranteed to be usable.
Platform.h is intended to contain definitions and workarounds
for concepts that depend upon the used compiler and/or platform.
Currently it ensures that /thread_local/ is available irrespective
of whether the source is compiled in pre- or post C11 or C++11 mode.
This file should be included first by all MaxScale headers.
The current implementation of idle connection timeouts is not safe. The sessions
are handled in a way which is not thread-safe and the checking is done from
a non-polling thread.
With this change, the checks for the session timeouts are done in one of the
polling threads in a thread-safe manner only if at least one service has enabled
the timing out of idle client connections.
The various global directory setter functions now process the input they receive
and remove redundant and trailing forward slashes from the directory paths.
Changed default number of threads to 1 instead of autoconfigured value and
added a new `auto` variable which enables autoconfiguration of thread count.
The number of threads used when autoconfiguratio fails was changed from 4 to 1.
The default value of using N threads where N is the number of CPU cores was
not optimal as the possibility of rescheduling was higher the more utility
threads there were. Due to this, N-1 is deemed to be the better autoconfigured
value for thread count.
