Statements can now be stored in the session object. This enables the
retrieval of these statements at a later time. These will be used by
readwritesplit to reroute failed reads to backup slaves.
The documentation listed the rules as a comma separated list when they
were parsed as a whitespace separated list. The match specifiers were also
defined as optional when in fact they were mandatory.
Storing the large events in memory allows checksum calculations to be done
in one step. This also makes the encryption of events easier as they
require the complete event in memory.
The backend protocol module can be requested to provide complete and
contiguous packets to the router module. This removes the need to process
the packets in binlogrouter.
MXS-848 (partially). The QLA-filter now has additional options
to control the printing.
1. "append"
This toggles append-mode, where the filter opens the log files in
update mode (if file already existed) and only adds text to the end.
2. "print_service"
This toggles writing the service name onto each row. Mostly useful
with the unified_file-setting.
3. "print_session"
This toggles writing the session number onto each row. Mostly useful
with the unified_file-setting.
Also, the filter now writes a header to the beginning of the file
when creating it.
The printing has been separated to its own helper-function, in case
more accurate control will be added in the future.
Added a check for the validity of the backend DCBs before they are
closed. This should guarantee that only valid DCBs are closed by
readwritesplit.
However, this is not the correct solution for the problem. The DCB should
not be in an invalid state in the first place and this fix just removes
the bad side effects of the double closing.
With the added logging in the readwritesplit error handler, more detailed
information should become available.
The errors were detected but the code proceeded to call various functions
with bad pointers. This led to a crash if a bad server name was given to
'show server'.
This commit introduces safe session references that can be handled without
holding locks. This allows the safe searching of sessions with the unique
ID of the session.
Remove the use of raw pointers passed as strings. Change the comments of
the argument types and add more details to the parsing function
documentation.
If a DCB is passed to the error handler for which we cannot find the
corresponding backend reference, it should not be closed.
Added extra logging for situations where the backend reference can't be
found or it is in the wrong state.
The module commands operations are now listed as `commands` instead of
`functions`. The output was also formatted and an optional filtering was
added to the `list commands` call.
When the client connections were listed, the DCB state was not
inspected. Only DCBs in the polling state should be printed as they are
guaranteed to be in a valid state.
Maxadmin can now create and destroy monitors. The created monitors are not
started as they would be useless without added servers and configuration
parameters.
When the monitor credentials were being written with snprintf, the source
and destination overlapped.
The serialization didn't add a 'type=monitor' line into the configuration.
The statistics of the polling system no longer match the implementation it
measures. Modified the statistics to better represent the new system by
calculating the number of epoll events each thread receives.
The polling system now has a concept of messages. This can be used to send
a synchronous message to the polling system which waits for all threads to
process the message before returning.
Currently this is used to flush unused DCBs when server persistent
statistics are reported.
Making the lists of persistent DCBs thread specific is both a bug fix and
a performance enhancement. There was a small window where a non-owner
thread could receive events for a DCB. By partitioning the DCBs into
thread specific lists, this is avoided by removing the possibility of DCBs
moving between threads.
When an epoll error occurs for a listener, the errno variable must be
stored in another variable while the listener is removed from all of the
epoll instances.
