Commit graph

407 commits

Author SHA1 Message Date
Mats Kindahl
e409d6f69c WL#5030: Split and remove mysql_priv.h
This patch:

- Moves all definitions from the mysql_priv.h file into
  header files for the component where the variable is
  defined
- Creates header files if the component lacks one
- Eliminates all include directives from mysql_priv.h
- Eliminates all circular include cycles
- Rename time.cc to sql_time.cc
- Rename mysql_priv.h to sql_priv.h
2010-03-31 16:05:33 +02:00
Alexey Kopytov
f10885675c Manual merge of mysql-trunk into mysql-trunk-merge.
Conflicts:

Text conflict in client/mysqlbinlog.cc
Text conflict in mysql-test/Makefile.am
Text conflict in mysql-test/collections/default.daily
Text conflict in mysql-test/r/mysqlbinlog_row_innodb.result
Text conflict in mysql-test/suite/rpl/r/rpl_typeconv_innodb.result
Text conflict in mysql-test/suite/rpl/t/rpl_get_master_version_and_clock.test
Text conflict in mysql-test/suite/rpl/t/rpl_row_create_table.test
Text conflict in mysql-test/suite/rpl/t/rpl_slave_skip.test
Text conflict in mysql-test/suite/rpl/t/rpl_typeconv_innodb.test
Text conflict in mysys/charset.c
Text conflict in sql/field.cc
Text conflict in sql/field.h
Text conflict in sql/item.h
Text conflict in sql/item_func.cc
Text conflict in sql/log.cc
Text conflict in sql/log_event.cc
Text conflict in sql/log_event_old.cc
Text conflict in sql/mysqld.cc
Text conflict in sql/rpl_utility.cc
Text conflict in sql/rpl_utility.h
Text conflict in sql/set_var.cc
Text conflict in sql/share/Makefile.am
Text conflict in sql/sql_delete.cc
Text conflict in sql/sql_plugin.cc
Text conflict in sql/sql_select.cc
Text conflict in sql/sql_table.cc
Text conflict in storage/example/ha_example.h
Text conflict in storage/federated/ha_federated.cc
Text conflict in storage/myisammrg/ha_myisammrg.cc
Text conflict in storage/myisammrg/myrg_open.c
2010-03-24 18:03:44 +03:00
Alexey Kopytov
7ac059ba8f Manual merge of mysql-5.1-bugteam into mysql-trunk-merge.
Conflicts:

Text conflict in mysql-test/suite/rpl/t/rpl_get_master_version_and_clock.test
Text conflict in sql/item_func.cc
2010-03-22 16:28:51 +03:00
Andrei Elkin
30df18909c Bug DBUG_SYNC_POINT is not defined on all platforms and mtr cant pre-check that
DBUG_SYNC_POINT has at least one strong limitation that it's not defined
on all platforms. It has issues cooperating with @@debug.
All in all its functionality is superseded by DEBUG_SYNC facility and
there is no reason to maintain the old less flexible one.

Fixed with adding debug_sync_set_action() function as a facility to set up
a sync-action in the server sources code and re-writing existing simulations
(found 3) to use it.
Couple of tests have been reworked as well.

The patch offers a pattern for setting sync-points in replication threads
where the standard DEBUG_SYNC does not suffice to reach goals.
2010-03-19 11:06:40 +02:00
Alexander Nozdrin
1a0f34e6a4 Manual merge from mysql-next-mr.
Conflicts:
  - sql/sys_vars.cc
2010-02-05 15:05:37 +03:00
Alexander Nozdrin
94c1dc58ad Auto-merge from mysql-trunk. 2010-02-05 15:02:03 +03:00
Luis Soares
6dd801d7b7 BUG#50364: manual merge to mysql-next-mr-bugfixing.
Conflicts
=========
Text conflict in sql/repl_failsafe.cc

Additional changes
==================
Replace references to pthread_mutex with mysql_mutex
2010-02-03 17:19:58 +00:00
Luis Soares
d0ffa8e51b BUG#50364: FLUSH LOGS crashes the server (rpl.rpl_heartbeat_basic
fails in PB sporadically)
      
The IO thread can concurrently access the relay log IO_CACHE
while another thread is performing an FLUSH LOGS procedure.
      
FLUSH LOGS closes and reopens the relay log and while doing so it
(re)initializes its IO_CACHE. During this procedure the IO_CACHE
mutex is also reinitialized, which can cause problems if some
other thread (namely the IO THREAD) is concurrently accessing it
at the time .
      
This patch fixes the problem by extending the interface of the
flush_master_info function to also include a second paramater, 
"need_relay_log_lock", stating whether the thread should grab the 
relay log lock or not before actually flushing the relay log. 
Also, IO thread now calls flush_master_info with this flag set 
when it flushes master info with in the event read_event loop.

Finally, we also increase loop time in rpl_heartbeat_basic test 
case, so that the number of calls to flush logs doubles, stressing
this part of the code a little more.
2010-02-03 16:56:17 +00:00
Alexander Nozdrin
a59e381efa Manual merge from mysql-5.1-bugteam.
Conflicts:
  - sql/mysql_priv.h
2010-01-30 21:47:11 +03:00
Luis Soares
a26ab94eb2 BUG#50780: 'show binary logs' debug assertion when binary
logging is disabled
      
The server would hit an assertion because of a DBUG violation.
There was a missing DBUG_RETURN and instead a plain return
was used.
      
This patch replaces the return with DBUG_RETURN.
2010-02-05 17:51:55 +00:00
Mats Kindahl
51af6729f2 Patch to eliminate warnings in mysql-next-mr-bugteam. 2010-01-25 22:34:34 +01:00
He Zhenxing
6bf8c119fe Backport Bug#37148 to 5.1 2010-01-24 15:03:23 +08:00
Alexander Nozdrin
eacc937d48 Manual merge from mysql-trunk-merge.
Conflicts:
  - configure.in
  - include/m_string.h
  - mysql-test/extra/rpl_tests/rpl_row_func003.test
  - mysql-test/r/mysqlbinlog.result
  - mysql-test/r/union.result
  - mysql-test/suite/binlog/r/binlog_killed_simulate.result
  - mysql-test/suite/binlog/r/binlog_row_mix_innodb_myisam.result
  - mysql-test/suite/binlog/r/binlog_unsafe.result
  - mysql-test/suite/binlog/t/binlog_unsafe.test
  - mysql-test/suite/rpl/r/rpl_loaddata_fatal.result
  - mysql-test/suite/rpl/r/rpl_loaddata_map.result
  - mysql-test/suite/rpl/r/rpl_stm_loaddata_concurrent.result
  - mysql-test/suite/rpl/r/rpl_stm_log.result
  - mysql-test/suite/rpl/t/rpl_optimize.test
  - mysql-test/t/mysqlbinlog.test
  - mysql-test/t/union.test
  - sql/rpl_utility.h
  - sql/sql_union.cc
  - strings/Makefile.am
2010-01-19 19:36:14 +03:00
Alexey Kopytov
82ba3e1dbc Manual merge from mysql-5.1-bugteam into mysql-trunk-merge.
Conflicts:

Text conflict in .bzr-mysql/default.conf
Text conflict in mysql-test/suite/rpl/r/rpl_loaddata_fatal.result
Text conflict in mysql-test/suite/rpl/r/rpl_stm_log.result
Text conflict in mysql-test/t/mysqlbinlog.test
Text conflict in sql/sql_acl.cc
Text conflict in sql/sql_servers.cc
Text conflict in sql/sql_update.cc
Text conflict in support-files/mysql.spec.sh
2010-01-15 14:26:53 +03:00
Alfranio Correia
fb0ee3ab8e merge mysql-next-mr --> mysql-5.1-rpl-merge
Conflicts:
  Text conflict in sql/sql_insert.cc
2010-01-14 16:02:55 +00:00
Alfranio Correia
46d1689b7c merge mysql-next-mr --> mysql-5.1-rpl-merge
Conflicts:
  Text conflict in sql/log.cc
  Text conflict in sql/slave.cc
  Text conflict in sql/sql_base.cc
2010-01-13 12:22:34 +00:00
b805e3d4d6 Manual merge from next-mr. 2010-01-12 20:07:09 +08:00
Marc Alff
67a48e1a4c WL#2360 Performance schema
Part V: performance schema implementation
2010-01-11 18:47:27 -07:00
8c677779ff BUG Infinite loop on slave relay logs
Manually deleteing one or more entries from 'master-bin.index', will
cause master infinitely loop to send one binlog file. 

When starting a dump session, master opens index file and search the binlog file
which is being requested by the slave. The position of the binlog file in the
index file is recorded. it will be used to find the next binlog file when current
binlog file has dumped completely. As only the position is used, it may
not get the correct file if some entries has been removed manually from the index file.
the master will reopen the current binlog file which has been dump completely
and redump it if it can not get the next binlog file's name from index file.
It obviously is a logical error.


Even though it is allowed to manually change index file,
but it is not recommended. so after this patch, master
sends a fatal error to slave and close the dump session if a new binlog file
has been generated and master can not get it from the index file.
2010-01-08 13:42:23 +08:00
Alfranio Correia
6f7929b143 merge mysql-5.1-rep+2-delivery1 --> mysql-5.1-rpl-merge
Conflicts:

Text conflict in .bzr-mysql/default.conf
Text conflict in mysql-test/extra/rpl_tests/rpl_loaddata.test
Text conflict in mysql-test/r/mysqlbinlog2.result
Text conflict in mysql-test/suite/binlog/r/binlog_stm_mix_innodb_myisam.result
Text conflict in mysql-test/suite/binlog/r/binlog_unsafe.result
Text conflict in mysql-test/suite/rpl/r/rpl_insert_id.result
Text conflict in mysql-test/suite/rpl/r/rpl_loaddata.result
Text conflict in mysql-test/suite/rpl/r/rpl_stm_auto_increment_bug33029.result
Text conflict in mysql-test/suite/rpl/r/rpl_udf.result
Text conflict in mysql-test/suite/rpl/t/rpl_slow_query_log.test
Text conflict in sql/field.h
Text conflict in sql/log.cc
Text conflict in sql/log_event.cc
Text conflict in sql/log_event_old.cc
Text conflict in sql/mysql_priv.h
Text conflict in sql/share/errmsg.txt
Text conflict in sql/sp.cc
Text conflict in sql/sql_acl.cc
Text conflict in sql/sql_base.cc
Text conflict in sql/sql_class.h
Text conflict in sql/sql_db.cc
Text conflict in sql/sql_delete.cc
Text conflict in sql/sql_insert.cc
Text conflict in sql/sql_lex.cc
Text conflict in sql/sql_lex.h
Text conflict in sql/sql_load.cc
Text conflict in sql/sql_table.cc
Text conflict in sql/sql_update.cc
Text conflict in sql/sql_view.cc
Conflict adding files to storage/innobase.  Created directory.
Conflict because storage/innobase is not versioned, but has versioned children.  Versioned directory.
Conflict adding file storage/innobase.  Moved existing file to storage/innobase.moved.
Conflict adding files to storage/innobase/handler.  Created directory.
Conflict because storage/innobase/handler is not versioned, but has versioned children.  Versioned directory.
Contents conflict in storage/innobase/handler/ha_innodb.cc
2010-01-07 15:39:11 +00:00
Marc Alff
a4c3bc618b WL#2360 Performance schema
Part IV: sql instrumentation
2010-01-06 22:42:07 -07:00
Sergei Golubchik
ae2768ce9c WL#4738 streamline/simplify @@variable creation process
Bug#16565 mysqld --help --verbose does not order variablesBug#20413 sql_slave_skip_counter is not shown in show variables
Bug#20415 Output of mysqld --help --verbose is incomplete
Bug#25430 variable not found in SELECT @@global.ft_max_word_len;
Bug#32902 plugin variables don't know their names
Bug#34599 MySQLD Option and Variable Reference need to be consistent in formatting!
Bug#34829 No default value for variable and setting default does not raise error
Bug#34834 ? Is accepted as a valid sql mode
Bug#34878 Few variables have default value according to documentation but error occurs  
Bug#34883 ft_boolean_syntax cant be assigned from user variable to global var.
Bug#37187 `INFORMATION_SCHEMA`.`GLOBAL_VARIABLES`: inconsistent status
Bug#40988 log_output_basic.test succeeded though syntactically false.
Bug#41010 enum-style command-line options are not honoured (maria.maria-recover fails)
Bug#42103 Setting key_buffer_size to a negative value may lead to very large allocations 
Bug#44691 Some plugins configured as MYSQL_PLUGIN_MANDATORY in can be disabled
Bug#44797 plugins w/o command-line options have no disabling option in --help
Bug#46314 string system variables don't support expressions
Bug#46470 sys_vars.max_binlog_cache_size_basic_32 is broken
Bug#46586 When using the plugin interface the type "set" for options caused a crash.
Bug#47212 Crash in DBUG_PRINT in mysqltest.cc when trying to print octal number
Bug#48758 mysqltest crashes on sys_vars.collation_server_basic in gcov builds
Bug#49417 some complaints about mysqld --help --verbose output
Bug#49540 DEFAULT value of binlog_format isn't the default value
Bug#49640 ambiguous option '--skip-skip-myisam' (double skip prefix)
Bug#49644 init_connect and \0
Bug#49645 init_slave and multi-byte characters
Bug#49646 mysql --show-warnings crashes when server dies
2009-12-22 10:35:56 +01:00
Alexander Nozdrin
f26ac4ba7a Manual merge from mysql-next-mr.
Conflicts:
  - sql/sql_yacc.yy
2009-12-02 18:50:14 +03:00
Andrei Elkin
e8e85ed2a6 Manual resolving for the following files
Text conflict in mysql-test/collections/default.experimental
Text conflict in mysql-test/r/show_check.result
Text conflict in mysql-test/r/sp-code.result
Text conflict in mysql-test/suite/binlog/r/binlog_tmp_table.result
Text conflict in mysql-test/suite/rpl/t/disabled.def
Text conflict in mysql-test/t/show_check.test
Text conflict in mysys/my_delete.c
Text conflict in sql/item.h
Text conflict in sql/item_cmpfunc.h
Text conflict in sql/log.cc
Text conflict in sql/mysqld.cc
Text conflict in sql/repl_failsafe.cc
Text conflict in sql/slave.cc
Text conflict in sql/sql_parse.cc
Text conflict in sql/sql_table.cc
Text conflict in sql/sql_yacc.yy
Text conflict in storage/myisam/ha_myisam.cc

Corrected results for
 stm_auto_increment_bug33029.reject      2009-12-01
		20:01:49.000000000 +0300
       <andrei> @@ -42,9 +42,6 @@
       <andrei>  RETURN i;
       <andrei>  END//
       <andrei>  CALL p1();
       <andrei> -Warnings:
       <andrei> -Note   1592    Statement may not be safe to log in statement
		format.
       <andrei> -Note   1592    Statement may not be safe to log in statement
		format.

There should be indeed no Note present because there is in fact autoincrement 
top-level query in sp() that triggers inserting in yet another auto-inc table.
(todo: alert DaoGang to improve the test).
2009-12-01 21:07:18 +02:00
Andrei Elkin
070d190906 mergin 5.1 -> rep+2 -> rep+3. create_table_from_dump issue will be merged on the next step 2009-11-30 20:20:26 +02:00
He Zhenxing
9b65f5782e BUG#37148 Most callers of mysql_bin_log.write ignore the return result
This is the non-ndb part of the patch.

The return value of mysql_bin_log.write was ignored by most callers,
which may lead to inconsistent on master and slave if the transaction
was committed while the binlog was not correctly written. If
my_error() is call in mysql_bin_log.write, this could also lead to
assertion issue if my_ok() or my_error() is called after.

This fixed the problem by let the caller to check and handle the
return value of mysql_bin_log.write. This patch only adresses the
simple cases.
2009-11-21 12:28:01 +08:00
Andrei Elkin
3a76c32c05 Bug backporting from 6.0-rpl to celosia a set of bugs
The mentioned on the bug report set of bugs fixes have not be pushed to the main trees.

Fixed with extracting commits done to 6.0-rpl tree and applying them to the main 5.1.
Notes.
1. part of changes - the mtr's specific - were packported to the main 5.0 tree for mtr v1
   as http://lists.mysql.com/commits/46562
   However, there is no that fix anymore in the mtr v2. (This fact was mailed to mtr maintaining
   people).

2. Bug@36929  crash in kill_zombie_dump_threads-> THD::awake() with replication tests
   is not backported because the base code of the patch is libevent and that was removed
   from the main trees due to its instability.
2009-11-20 15:30:35 +02:00
Luis Soares
27b1c660e3 manual merge: mysql-5.1-rep+2 (bug tree) --> mysql-5.1-rep+2 (latest)
CONFLICTS
=========

Text conflict in sql/sql_yacc.yy
1 conflicts encountered.
2009-11-13 10:17:53 +00:00
Andrei Elkin
d09bded416 merging 5.1 main -> 5.1-rep+2 -> 5.1-rep+3; binlog_unsafe , rpl_mysql_upgrade fail and are under treatment 2009-11-10 20:45:15 +02:00
Andrei Elkin
69d6fcbd3b merging 5.1 main -> rpl+2. Some manual work required mostly due to bug46640 2009-11-06 18:35:04 +02:00
Luis Soares
6e068a9cf8 BUG#48048: Deprecated constructs need removal in Betony
NOTE: Backport of:

bzr log -r revid:sp1r-serg@sergbook.mysql.com-20070505200319-38337
------------------------------------------------------------
revno: 2469.263.4
committer: serg@sergbook.mysql.com
timestamp: Sat 2007-05-05 13:03:19 -0700
message:
  Removing deprecated features:
  --master-XXX command-line options
  log_bin_trust_routine_creators
  table_type
  BACKUP TABLE ...
  RESTORE TABLE ...
  SHOW PLUGIN
  LOAD TABLE ... FROM MASTER
  LOAD DATA FROM MASTER
  SHOW INNODB STATUS
  SHOW MUTEX STATUS
  SHOW TABLE TYPES
  ... TIMESTAMP(N)
  ... TYPE=engine
  
  RESET SLAVE don't reset connection parameters anymore
  LOAD DATA: check opt_secure_file_priv before access(filename)
  improved WARN_DEPRECATED macro
2009-11-04 12:28:20 +00:00
Alexander Nozdrin
8c95f3c53b Manual merge from mysql-next-mr. 2009-11-02 14:10:04 +03:00
Alexander Nozdrin
800ba382d9 Fix automerge: s/hash_search/my_hash_search/. 2009-10-28 11:42:18 +03:00
Alexander Nozdrin
ac7ba1bcaa Merge from mysql-next-mr. 2009-10-28 10:55:44 +03:00
Alexander Nozdrin
c6aeab8cfe Automerge from mysql-next-mr. 2009-10-27 12:59:09 +03:00
Alexander Nozdrin
069d78c067 Merge from mysql-next-mr. 2009-10-23 15:22:21 +04:00
Luis Soares
58e2fde011 manual merge: mysql-5.1-rep+2-delivery1 --> mysql-5.1-rpl-merge
Conflicts
=========

Text conflict in .bzr-mysql/default.conf
Text conflict in libmysqld/CMakeLists.txt
Text conflict in libmysqld/Makefile.am
Text conflict in mysql-test/collections/default.experimental
Text conflict in mysql-test/extra/rpl_tests/rpl_row_sp006.test
Text conflict in mysql-test/suite/binlog/r/binlog_tmp_table.result
Text conflict in mysql-test/suite/rpl/r/rpl_loaddata.result
Text conflict in mysql-test/suite/rpl/r/rpl_loaddata_fatal.result
Text conflict in mysql-test/suite/rpl/r/rpl_row_create_table.result
Text conflict in mysql-test/suite/rpl/r/rpl_row_sp006_InnoDB.result
Text conflict in mysql-test/suite/rpl/r/rpl_stm_log.result
Text conflict in mysql-test/suite/rpl_ndb/r/rpl_ndb_circular_simplex.result
Text conflict in mysql-test/suite/rpl_ndb/r/rpl_ndb_sp006.result
Text conflict in mysql-test/t/mysqlbinlog.test
Text conflict in sql/CMakeLists.txt
Text conflict in sql/Makefile.am
Text conflict in sql/log_event_old.cc
Text conflict in sql/rpl_rli.cc
Text conflict in sql/slave.cc
Text conflict in sql/sql_binlog.cc
Text conflict in sql/sql_lex.h
21 conflicts encountered.

NOTE
====
 mysql-5.1-rpl-merge has been made a mirror of mysql-next-mr:
 - "mysql-5.1-rpl-merge$ bzr pull ../mysql-next-mr"

 This is the first cset (merge/...) committed after pulling 
 from mysql-next-mr.
2009-10-22 23:30:28 +01:00
Alexander Nozdrin
cec638b590 Automerge from mysql-next-mr. 2009-10-22 22:06:01 +04:00
Konstantin Osipov
d4632dff5a Backport of revno 2630.28.10, 2630.28.31, 2630.28.26, 2630.33.1,
2630.39.1, 2630.28.29, 2630.34.3, 2630.34.2, 2630.34.1, 2630.29.29,
2630.29.28, 2630.31.1, 2630.28.13, 2630.28.10, 2617.23.14 and
some other minor revisions.

This patch implements: 

WL#4264 "Backup: Stabilize Service Interface" -- all the
server prerequisites except si_objects.{h,cc} themselves (they can
be just copied over, when needed).

WL#4435: Support OUT-parameters in prepared statements.

(and all issues in the initial patches for these two
tasks, that were discovered in pushbuild and during testing).

Bug#39519: mysql_stmt_close() should flush all data
associated with the statement.

After execution of a prepared statement, send OUT parameters of the invoked
stored procedure, if any, to the client.

When using the binary protocol, send the parameters in an additional result
set over the wire.  When using the text protocol, assign out parameters to
the user variables from the CALL(@var1, @var2, ...) specification.

The following refactoring has been made:
  - Protocol::send_fields() was renamed to Protocol::send_result_set_metadata();
  - A new Protocol::send_result_set_row() was introduced to incapsulate
    common functionality for sending row data.
  - Signature of Protocol::prepare_for_send() was changed: this operation
    does not need a list of items, the number of items is fully sufficient.

The following backward incompatible changes have been made:
  - CLIENT_MULTI_RESULTS is now enabled by default in the client;
  - CLIENT_PS_MULTI_RESUTLS is now enabled by default in the client.
2009-10-22 00:02:06 +04:00
Sergei Golubchik
6fecc5b726 bug#34741 prepared show master logs without binlogging debug assert
s/return/DBUG_RETURN/
2009-10-19 15:04:27 +02:00
He Zhenxing
ae107c5581 Manual merge 5.1-rep+2 to 5.1-rep+3 2009-10-18 11:57:38 +08:00
Alexander Nozdrin
ca08f10ccd Manual merge from mysql-trunk-merge. 2009-10-14 12:25:39 +04:00
He Zhenxing
c1584c9801 Postfix after merge semi-sync with heartbeat
Use ev_offset instead of 1 as the packet header offset when getting
log position from events for heartbeat

call reset_transmit_packet before calling send_heartbeat_event
2009-10-14 13:24:47 +08:00
He Zhenxing
62d218edfe Manual merge semi-sync to 5.1-rep+2 2009-10-03 18:50:25 +08:00
He Zhenxing
79faadd54d Backport BUG#12190 CHANGE MASTER has differ path requiremts on MASTER_LOG_FILE and RELAY_LOG_FILE
CHANGE MASTER TO command required the value for RELAY_LOG_FILE to
be an absolute path, which was different from the requirement of
MASTER_LOG_FILE.

This patch fixed the problem by changing the value for RELAY_LOG_FILE
to be the basename of the log file as that for MASTER_LOG_FILE.
2009-10-02 16:35:03 +08:00
Andrei Elkin
6d1ad12428 merge from 5.1-rpl+2 repo to a local branch with HB and bug@27808 fixes 2009-10-01 20:22:44 +03:00
Andrei Elkin
f68119a745 backporting bug@27808 fixes 2009-10-01 19:44:53 +03:00
Sven Sandberg
31193a632e merged fixes for BUG#39934 to 5.1-rpl+3
Also renamed current_stmt_binlog_row_based to
current_stmt_binlog_format_row for consistency
2009-09-30 18:00:22 +02:00
Luis Soares
19e6d1c596 Automerge: mysql-5.1-rep+2 (local backports) --> mysql-5.1-rep+2 (local latest) 2009-09-30 12:48:22 +01:00
Alfranio Correia
a48ff22004 BUG#40337 Fsyncing master and relay log to disk after every event is too slow
NOTE: Backporting the patch to next-mr.
      
The fix proposed in BUG#35542 and BUG#31665 introduces a performance issue
when fsyncing the master.info, relay.info and relay-log.bin* after #th events.
Although such solution has been proposed to reduce the probability of corrupted
files due to a slave-crash, the performance penalty introduced by it has
made the approach impractical for highly intensive workloads.
      
In a nutshell, the option --syn-relay-log proposed in BUG#35542 and BUG#31665
simultaneously fsyncs master.info, relay-log.info and relay-log.bin* and
this is the main source of performance issues.
      
This patch introduces new options that give more control to the user on
what should be fsynced and how often:
      
   1) (--sync-master-info, integer) which syncs the master.info after #th event;
   2) (--sync-relay-log, integer) which syncs the relay-log.bin* after #th
   events.
   3) (--sync-relay-log-info, integer) which syncs the relay.info after #th
   transactions.
      
   To provide both performance and increased reliability, we recommend the following
   setup:
      
   1) --sync-master-info = 0 eventually the operating system will fsync it;
   2) --sync-relay-log = 0 eventually the operating system will fsync it;
   3) --sync-relay-log-info = 1 fsyncs it after every transaction;
      
Notice, that the previous setup does not reduce the probability of
corrupted master.info and relay-log.bin*. To overcome the issue, this patch also
introduces a recovery mechanism that right after restart throws away relay-log.bin*
retrieved from a master and updates the master.info based on the relay.info:
      
      
   4) (--relay-log-recovery, boolean) which enables a recovery mechanism that
   throws away relay-log.bin* after a crash.
      
However, it can only recover the incorrect binlog file and position in master.info,
if other informations (host, port password, etc) are corrupted or incorrect,
then this recovery mechanism will fail to work.
2009-09-29 15:40:52 +01:00