ChangeLog

2009-04-15 Steve Chu <stvchu@gmail.com>
  * Remove stats malloc and stats maps due to a security issue. Thanks <jtesta@positronsecurity.com> for reporting this.

2009-03-10 Steve Chu <stvchu@gmail.com>
  * new option '-G' for setting log file dir(sometime we want to put log files in a different place, such as SSD disk partition) 

2009-03-05 Steve Chu <stvchu@gmail.com>
  * Fix some warnings on 64-bit compiler, thanks to Nicolas<n.favrefelix@gmail.com>

2009-02-26 Steve Chu <stvchu@gmail.com>
  * Bugfix: 64bit box can not specify memory pool size larger than 2G with '-m' option
  * new option '-E' to automatically remove log files that are no longer needed, but PLEASE NOTICE:
    - "Automatic log file removal is likely to make catastrophic recovery impossible."
    - "Replication applications will rarely want to configure automatic log file removal as it increases the likelihood a master will be unable to satisfy a client's request for a recent log record." So this option will be disabled when replication is on regardless of whether you specify it.
  * Bugfix: slight security issue when client specify a negative value length

2009-01-13 Steve Chu <stvchu@gmail.com>
  * some default settings policy changed(because most of us is using powerful box):
   max simultaneous connections ('-c'): 1024 -> 4096
   item buffer size('-b'): 512 bytes -> 2048 bytes
   in-memmory cache size of BerkeleyDB('-m'): 64MB -> 256MB
   log buffer size('-L'): 32KB -> 4MB
 
2009-01-06 Steve Chu <stvchu@gmail.com>
  * new 'rget' command patch for 'memcache.py'

2008-12-25 Version 1.2.1-beta released

2008-12-10 Steve Chu <stvchu@gmail.com>
  * new option '-X' to make the BerkeleyDB allocate region memory from the heap instead of from memory backed by the filesystem or system shared memory. If this option enabled, you can not use db_* standalone utilities(use private commands instead), but get performance improved.

2008-11-27 Steve Chu <stvchu@gmail.com>
  * new flexible query command 'rget' implemented, can do range query based
	on keys. See 'doc/rget.txt' for details.

2008-11-26 Steve Chu <stvchu@gmail.com>
  * more graceful exit

2008-11-24 Version 1.2.0 released
2008-10-16 Version 1.2.0-beta released

2008-10-14 Steve Chu <stvchu@gmail.com>
  * a new unittest suit 'mdbtest.py' is added
  * a new benchmark suit 'mcben.py' is added, now you can get the benchmark in your environment
    and find out how fast MemcacheDB can run.

2008-10-08 Steve Chu <stvchu@gmail.com>
  * lots of statistics code clean up; stats command adjusted for better rendering; now more replication statistics info is provided. 
  * more compact and verbose message for logging
  * lots of replication code clean up for more reliable electing, a new option "-n" is added that allows user to customize the votes of electing.
  * "memcache.py" is nearly patched for recent changes on private commands. 

2008-09-04 Steve Chu <stvchu@gmail.com>
  * New option '-e' to set percent of the pages in the cache that should be clean, used for memp_trickle call(only available when '-T' is presented).
   
2008-09-03 Steve Chu <stvchu@gmail.com>
  * Replace the database type setting option '-T' with '-B'
  * Now '-T' has new meaning that it fires a separate thread to do memp_trickle every xx seconds.
    This feature makes the memory pool more effective by reducing too much frequent pages swapping.
   
2008-09-01 Steve Chu <stvchu@gmail.com>
  * Now 'append' and 'prepend' commands are supported.
  * Merge bugfix code from Memecached community.
  * lots of refactors for better implementation and a bit code tuning.

2008-08-28 Version 1.1.0 released
2008-08-28 Version 1.0.4 released(maitaining release)

2008-07-25 Steve Chu <stvchu@gmail.com>
  * Warning: 'pkget' and 'pvget' private command now has been discarded. 
    MemcacheDB will be a more memcache protocol compatible daemon(append and
    prepend command will be implemented later), and will not add relational 
    data model any more, the structural data storage will be issued by another
    project (now internal only).

2008-07-25 Steve Chu <stvchu@gmail.com>
  * Bugfix: "multiple get" did not return the right value

2008-07-23 Steve Chu <stvchu@gmail.com>
  * add more other replication configure parameters

2008-07-14 Steve Chu <stvchu@gmail.com>
  * rename "default.db" to "data.db" for less ambiguity

2008-07-04 Steve Chu <stvchu@gmail.com>
  * work well with Mac OS X(tested on Lepard 10.5.4)
  * new 'db_compact' private command to compact a btree database

2008-07-03 Version 1.1.0-beta released

2008-06-26 Steve Chu <stvchu@gmail.com>
  * unix socket connectivity now has be well tested.

2008-06-13 Steve Chu <stvchu@gmail.com>
  * some code refactoring to improve a bit performance

2008-06-11 Steve Chu <stvchu@gmail.com>
  * now '-b' option is a tuning way, not a limit. item size that smaller than
    '-b' value use fast freelist alloc, otherwise, use system 'malloc' instead.
    Many thanks to Davies Liu <davies.liu@gmail.com> for patches and ideas.

2008-06-03 Steve Chu <stvchu@gmail.com>
  * new support to BerkeleyDB 4.7
    - new version is BerkeleyDB 4.7 only, due to the changed bdb api
    - 'rep_set_request' now use time, not the number of messages

  * Bugfix: 'pkget' and "multiple get" that return lots of items may 
    cause memory overflow so the daemon crashes. Thanks to Davies Liu <davies.liu@gmail.com>

  * flooded verbose messages of bdb and replication now move to '-vv' option

2008-04-13 Steve Chu <stvchu@gmail.com>
  * Changes:
     - allow limitation to 'pkget' and 'pvget' command, 
       use 'pkget/pvget <prefix> [limit]' to get limited matched items. 
	 - 'memcache.py' is also patched for this feature.

2008-04-03 Steve Chu <stvchu@gmail.com>
  * New features: 
    - add '-T' option to set database type, 'btree' or 'hash'
    - add '-E' option to enable second database, so we can use 'pvget'
    - new command 'pkget' that you can get items with a key prefix
    - new command 'pvget' that you can get items with a value prefix
  * Changes:
    - add support to memcache.py for 'pkget' and 'pvget' command, see
	'tools/memcache.py'

2008-03-21 Version 1.0.3 released

2008-03-21 Steve Chu <stvchu@gmail.com>
  * Bugfix: --with-bdb can not find libdb.so and db.h

2008-03-17 Steve Chu <stvchu@gmail.com>
  * add a '-A' option to set page size, and also can get this value from
    'stats bdb'

2008-03-07 Steve Chu <stvchu@gmail.com>
  * new private command 'rep_set_request' available, to set wehther it allows bulk
    transfer and also can get this value from 'stats rep'. See 'doc/replication.txt'
  * mdbtop.py update

2008-03-06 Steve Chu <stvchu@gmail.com>
  * new private command 'rep_set_bulk' available, to set wehther it allows bulk
    transfer and also can get this value from 'stats rep'. See 'doc/replication.txt'

2008-03-05 Steve Chu <stvchu@gmail.com>
  * add 'next_lsn' to 'stats rep' to show master-slave sync status
  * Make the default ack policy 'DB_REPMGR_ACKS_ONE_PEER'
  * upgrade 'mdbtop.py' for better rendering

2008-03-04 Version 1.0.2-beta released
2008-03-03 Steve Chu <stvchu@gmail.com>
  * replication configure changed and improved:
    - Make the default ack policy 'DB_REPMGR_ACKS_ALL_PEERS'
    - Make the default ack timeout 20 millisecond
    - two new private commands 'rep_set_ack_policy' and
      'rep_set_ack_timeout' are available to set ack_policy and ack_timeout,
      and 'stats rep' also includes this two value. See
      'docs/replication.txt'

2008-02-29 Steve Chu <stvchu@gmail.com>
  * give a warning if item buffer size larger than 256KB
  * memcache.py is patched for private commands. See 'tools/memcache.py'

2008-02-26 Steve Chu <stvchu@gmail.com>
  * Bugfix: incr/decr is not atomic in multithread, porting mistake from memcached

2008-02-21 Version 1.0.1-beta released

2008-02-21 Steve Chu <stvchu@gmail.com>
  * Bugfix: some private commands may cause seg fault

2008-02-20 Steve Chu <stvchu@gmail.com>
  * Bugfix: incr/decr command did not update length string

2008-02-18 Steve Chu <stvchu@gmail.com>
  * merge all read-only private command of replication into 'stats rep' that memcached client
    can read it. Original commands are still available. 'stats bdb' is also provided.	
  * 'mdbtop.py', a new monitor tool is added for easy maintaining. See 'tools/mdbtop.py'

2008-02-14 Big Version 1.0.0-beta released

2008-02-01 Steve Chu <stvchu@gmail.com>
  * Almost entire code is rewritten based on Memcached 1.2.x.
  * More memcache protocol compatibility, now multiple get and flags are supported,
    also udp and unix socket is ready(not yet tested).
  * big performance improved due to memcached 1.2.x code base. Thread is
    used to resolve the blocked I/O.
  * use standard build tool, "./configure;make;make install" and done.
  * two new pravite command for replication to set/get priority. See
    "doc/replication.txt".

2008-01-21 Version 0.1.1 released

2008-01-21 Steve Chu <stvchu@gmail.com>
  * Bug fix: out string 'NOT STORED' breaks clients, it should be
    'NOT_STORED'! 

2007-11-05 Version 0.1.0 released

2007-10-30 Cao Kai <caokai@staff.sina.com.cn>, Steve Chu <stvchu@gmail.com>
  * big replication code merged, let's ship it!
    using option "-R" to enable replication, two private command is added for
    replication: db_ismaster, db_whoismaster
  * code refactor for performance and readability

2007-10-23 Version 0.0.4 released

2007-10-22 Steve Chu <stvchu@gmail.com>
  * add a new struct db_settings for all db related configures.
  * big code cleanup for performance.
  * "-L" option now uses a unit of kbytes. 

2007-10-19 Cao Kai <caokai@staff.sina.com.cn>
  * add option "-C" and create a separate thread to do periodic checkpoint
  * add option "-D" and create a separate thread to do periodic deadlock detecting

2007-10-15 Novey Donar <xiaogang1@staff.sina.com.cn>
  * remove the item key in data.data, about 50% db file size reduced, but not compatible
    with previous versions, warning to use.

2007-10-08 Steve Chu <stvchu@gmail.com>
  * add option "-L" to allow to set transaction log buffer
  * add option "-N" to allow to set DB_TXN_NOSYNC flag, if someone wanted
    lots of performance improved, but warning to use, because it loses transaction's durability

2007-09-29 Version 0.0.3 released

2007-09-29 Steve Chu <stvchu@gmail.com>
  * add command "flush_all" that will truncate a database, warning to use.
  * lots of code formated
  * Bugfix: Now using "-u" option can get proper db file mode

2007-09-21 Version 0.0.2 released

2007-09-20 Steve Chu <stvchu@gmail.com>
  * move some macro to memcachedb.h
  * rename chkpoint to db_checkpoint, for consistency.
  * add new command "db_archive" to remove log files that are no longer needed
  * README updated

2007-09-19 Steve Chu <stvchu@gmail.com>
  * enlarge incr value to unsigned int to conform memcache protocol, now supports max value of 4294967295.

2007-09-18 Version 0.0.1 released