# ChangeLog v0.x

## v 0.53

> released 2011-09-27

- Fix for FreeBSD/OpenBSD and -lm

- Added memcached_exist()

- Fix for memory when using config test.

- CLI gained --quiet

## v 0.52

> released 2011-09-12

- Build fixes for Ubuntu/Suse.

- Fixes for OSX Lion.

- Bug fix for looping back through dns lookups under certain failures.

- Fixes related to dead server failures.

## v 0.51

> released 2011-07-21

- memcached_callback_set() now takes its data argument as const

- Update to tests.

- Fix in parser for port number.

## v 0.50

> released 2011-06-20

- Updates to C++ interface

- Custom free allocators need to now check for value before calling free.

- memcached_fetch_result() now uses the internal result when available (about 25 to 50% faster).

- Fix for stats structure.

- Updates to documentation.

- memcached_fetch_result() now uses the internal result when available (about 25 to 50% faster).

## v 0.49

> released 2011-04-14

- Fix calls to auto methods so that if value is not passed in nothing bad happens.

- New parser calls for generating memcached_st objects.

- New error system.

- New flow control for messages means faster get/set calls.

- Added new documentation system.

- A behavior change has been now made that if you specify a weight for any server, we enable the weight flag and do weight balancing.

- Added MEMCACHED_BEHAVIOR_REMOVE_FAILED_SERVERS to simplify the setting of AUTO REJECT for servers.

## v 0.48

> released 2011-03-16

- Fix memory leak in server parse.

- Move test framework out to be its own library (easier to work with Gearman).

## v 0.47

> released 2011-02-24

- Additional fixes for OpenBSD.

- Bug fix 677609, 456080.

- SIGPIPE fix for Linux send().

- memcapable can now test ascii or binary based on flags.

- Additional build fixes for SASL.

## v 0.46

> released 2011-02-14

- Fixes a number of corner case bugs.

- Fixes related to OpenBSD.

- Better testing for protocol version.

- Removes special case infinite wait on blocking setup.

## v 0.45

> released 2011-02-09

- Add support for systemtap

## v 0.44

> released 2010-09-23

- Windows bug fixes.

- Hudson port support in test harness.

- Improved portability of test hanrness.

- SASL fixes.

## v 0.43

> released 2010-07-28

- Added --args to memstat so that a greater range of values can be returned.

- Prelimanary support for Windows.

- memcached_stat_execute() merged.

## v 0.42

> released 2010-07-06

- Mistake in libtool caused issue with library version

## v 0.41

> released 2010-06-30

- Added --file for memcat.

- Added limemcached_ping() to libmemcached_util

- Bugfix for some cases where connect would have issues with timeout.

- Wrong value for errno given as error on an IO failure inside of poll.

- Bug fix for issue where multiple interfaces with bad DNS were not being caught.

## v 0.40

> released 2010-04-23

- Placed retry logic in for busted resolvers

- Add an ignore for SIGPIPE to solve OSX issues.

- A couple of fixed for memcached_light server.

- Updated to debug mode to track io_wait

## v 0.39

> released 2010-04-06

- Add support for prefix keys to binary protocol.

- Remove the undocumented call memcached_server_remove().

- The undocumented call memcached_server_by_key() now returns const.

- memcached_server_error_reset() has been deprecated.

- memcached_server_list() has been deprecated. Use memcached_server_cursor() to walk the servers found in a memcached_st() structure.

- memcached_verbosity() can now be run concurrently with other operations.

- SASL support.

- Fixes memory leak found in EJECT HOSTS.

## v 0.38

> released 2010-02-10

- C++ interface for libhashkit.

- Modified memcached_set_memory_allocators() so that it requires a context pointer.

- memcached_clone() now runs 5 times faster.

- Functions used for callbacks are now given const memcached_st.

- Added MEMCACHED_BEHAVIOR_CORK.

- memslap now creates a configuration file at ~/.memslap.cnf

- memcached_purge() now calls any callbacks registered during get execution.

- Many fixes to memslap.

- Updates for memcapable.

- Compile fixes for OpenBSD.

- Fix for possible recursive decent on IO failure.

## v 0.37

> released 2010-01-12

- Fixed build for libhashkit.

- Fixed install path regression.

- Modified RPM to strict check install.

- Added documentation for memcached_server_cursor();

- Added memcached_servers_reset().

- Modified memcached_st to remove dead cursor_server member.

## v 0.36

> released 2010-01-07

- Merged in new memslap utility.

- All of constants.h has been updated to match style (all old identifiers continue to work).

- Added first pass for libhashkit.

- Updated test Framework/extended tests.

- Random read support during replication added.

- Modified use_sort so that the option can be applied to any distribution type.

- We removed the MEMCACHED_BEHAVIOR_KETAMA_COMPAT_MODE added in 0.35. Instead use memcached_behavior_set_distribution().

## v 0.35

> released 2009-11-09

- Added support for by_key operations for inc/dec methods.

- Added mget test to memslap.

- Support for compatible ketama for SpyMemcached

- Update C++ interface.

- Fix for memcp

## v 0.34

> released 2009-10-13

- Added support for setting behavior flags on a connection pool.

- Don't increment server_failure_counter on normal disconnects.

- Added prototype for a callback based protocol parser (server side) with examples so that you could let your own application speak the memcached protocol

- Updated memcapable to test ASCII protocol.

- Changed behavior so that server can be removed at first sign of failure.

- Added memcached_server_get_last_disconnect() call

## v 0.33

> released 2009-09-23

- Added memcapable to test servers for binary compatibility.

- Updated C++ interface. Added basic support for C++ exceptions. Added multiple constructors the memcached client object. The C++ interface now takes parameters which are C++ types (such as std::string).

- Several bug fixes for binary protocol support.

- Fixed crashing issue with dumping from memcachd server (server internals were changed without documenting change).

## v 0.32

> released 2009-09-15

- Change of behavior where linger is only modified for no-block and then it is set to zero.

- Added Twitter's memcached_server_error() functions.

- Fix for OSX compiles in development builds.

- Updated C++ interface.

- Updated memcached_mget and memcached_mget_by_key to take a size_t as a parameter instead of an unsigned int for number_of_keys.

## v 0.31

> released 2009-07-10

- Added support or HA via replication.

- malloc() removed for server key usage.

- Update build system.

- Added support for memcached_set_memory_allocators().

- Fixed bug in configure.ac for have_htoll.

## v 0.30

> released 2009-06-01

- Added memcachd_dump command (and framework for memdump tool).

- Realigned all structures to remove padding (and line up important bits for 64bit caches.

- Remove some of sprintf() in storage calls().

- Removed printf() in stat call for unknown stat member.

- memcached_generate_hash() function added.

- Added tests to make sure all hash functions are stable.

## v 0.29

> released 2009-05-19

- Fixed malloc usage to calloc for spots where we need zero filled memory.

- All code warnings now treated as errors.

- Fixes for debian packaging.

- Added new pooling mechanism.

- MEMCACHED_BEHAVIOR_NO_BLOCK no longer also sets MEMCACHED_BEHAVIOR_BUFFER_REQUESTS.

- Updated generic rpm.

## v 0.28

> released 2009-04-15

- Fixed bug in init sructure (reapplied)

- Fixed bug in get/set by key (nikkhils@gmail.com)

## v 0.27

> released 2009-03-30

- Added new UDP fire-forget mode.

- Reworked performance for mget() to better make use of async protocol

- Cleaned up execution of fetch (just one set of code now)

- Fixed Jenkin's for big endian hosts.

- Updates for memstat to determine network latency.

- Updates for binary protocol.

- Many updates to documentation.

## v 0.26

> released 2009-01-29

- Fix for decrement on hash key

- Fixed assert that was catching bad memset() call in host_reset()

- Fix purge issue for blocked IO which has been stacked.

## v 0.25

> released 2008-11-28

- Jenkins HASH added.

- Update of Murmur hash code

- Support explicit weights (Robey Pointer, Evan Weaver)

- Bugfix for ketama continuum (Robey Pointer)

- New behavior MEMCACHED_BEHAVIOR_HASH_WITH_PREFIX_KEY (Robey Pointer)

- Don't ever call stats for weighting servers, because it is unstable.

## v 0.24

> released 2008-09-16

- Cleanup compile warnings.

- Fix issues in partitioning by keys.

- Fixed "fail case" to make sure when calling memcached_clone() no memcached_st is over written.

- New memcached_server_by_key() method for finding a server from a key.

- memcached_server_free() was added for freeing server structures.

## v 0.23

> released 2008-09-07

- Added strings.h header for Solaris 9

- Solaris 64bit fix.

- Support for weighted Ketama from Yin Chen.

- Fix for Chinese

- Fix for 0 length key to trigger bad key.

- Added behaviors MEMCACHED_BEHAVIOR_SND_TIMEOUT, MEMCACHED_BEHAVIOR_RCV_TIMEOUT

- Support for Binary Protocol added

## v 0.22

> released 2008-07-14

- Fix where master key was no being checked for "bad key"

- Fixed bugs in stats output (thread output was wrong)

- Clarified MEMCACHED_BAD_KEY_PROVIDED is return for bad prefix key.

- Found a bug in Flags return (Jacek Ostrowski)

- Fixed issue with compiling on Visual Studio

## v 0.21

> released 2008-05-24

- Change of char * to const char * for all key based functions.

- New MEMCACHED_CALLBACK_PREFIX_KEY added. You can now create domains for values.

- Fixed bug introducd in last version on memcp

- Fix for death of file io to call shutdown()

## v 0.20

> released 2008-05-05

- New consistent distribution tests.

- Found a memory leak when a server constantly fails.

- Fix in watchpoint macro

- Changed default timeout to 1 second for poll timeouts

- Wheel uses less memory/dynamic allocation for size (no longer limited to 512 hosts by default.

- memslap memory leak fix

- Added Ketama distribution

- Fix assert.h compile problem on CentOS

## v 0.19

> released 2008-04-09

- Documentation fix in libmemcached.

- Fixed bug where sort was always occuring on hosts

- Logic fix in branch prediction (thanks Jay!)

- Read through cached support.

- Fixed for cas by key operation.

- Fix for memcached_server_st list structures to have correct count.

- Added callback MEMCACHED_CALLBACK_DELETE_TRIGGER

- Removed function call in favor of macro (aka cut out some instructions)

## v 0.18

> released 2008-03-17

- Fix plus tests for non-zero value objects and flags.

- MEMCACHED_HASH_MURMUR added for murmur algorithm provided.

- MEMCACHED_BEHAVIOR_RETRY_TIMEOUT added to keep connecting from looping on timeout.

- gcc branch prediction optimizations

- Refactored entire tree to make include files cleaner

- Fixed leaked socket.

## v 0.17

> released 2008-02-27

- MEMCACHED_BEHAVIOR_CONNECT_TIMEOUT added for connect timeout in non-block mode.

- Incompatible change in memcached_behavior_set() api. We now use a uint64_t, instead of a pointer.

- Fix for storage of values for zero.

- memcached_server_cursor() function added to API for cycling through servers.

## v 0.16

> released 2008-02-18

- Work on the UDP protocol

- Added get_by_key, set_by_key tests for C++ API

- Fix for limit_maxbytes to be 64bit in stats

- Added Atom Smasher test (scale baby, scale!)

- Servers are now sorted, meaning that servers are now ordered so that clients with the same lists, will have same distribution. (Idea from Ross McFarland). MEMCACHED_BEHAVIOR_SORT_HOSTS was added to enable this support.

- Added MEMCACHED_BAD_KEY_PROVIDED error for auto, set, and get operations. MEMCACHED_BEHAVIOR_VERIFY_KEY was added to enable this feature.

- More error messages on command line tools.

- Fixed bugs in memcached_cas() operator.

- Fix to loop through interfaces

## v 0.15

> released 2008-01-29

- More work on the C++ API.

- Bug fixes around block corner cases.

- Slight performance increase in both read() and write().

## v 0.14

> released 2008-01-22

- For for bug found by Evan Weaver where increment() was not returning propper error of value was not found.

- Fix for bad null pointer on flag by Toru Maesaka.

- Refactor of all IO to just pass in the active server

- Problem configuring (PKG_CHECK_MODULES) fixed by removal of "rpath" in support/libmemcached.pc.in (Thanks to Ross McFarland).

- Added memcached_callback_get()/set()

- First prototype of C++ interface

- Updated docs for uint16_t changes in previous release

## v 0.13

> released 2008-01-13

- MEMCACHED_BEHAVIOR_USER_DATA added to store user pointer.

- Fix for failure to connect to invalidate socket.

- Patch from Marc Rossi to add --hash option for memcp, memrm, and memcat.

- Kevin's patch for fixing EOF issues during a read.

- Toru Maesaka patch for stats mismatch

- Fix for when CRC return 0

- Fixed uint16_t issues around flags. Turns out the documentation on the protocol was wrong.

- Lingering socket fixes for FreeBSD.

- Patches from Kevin Dalley for FreeBSD 4.0

- Added multi delete functions.

- All get key returns have C style null termination

- If memcached_server_list_append is passed NULLs instead of pointers it returns NULL.

- Added memcached_fetch_execute() method

- Found a bug where memcached_fetch() was not null terminating the result value.

- memcached_behavior() now has the ability to set "buffering" so that data is not automatically flushed.

- Behavior change, buffered commands now return MEMCACHED_BUFFERED

## v 0.12

> released 2007-12-11

- Updates for consistent hashing

- IPV6 support

- Static allocation for hostname (performance)

- Fixed bug where in non-block mode all data might not have been sent on close().

- Refactor of memcached_get() to use common code.

- Change in value fetch, MEMCACHED_END is now returned when keys are no longer in the pipe.

- Fixed bug where key could be out of range of characters

- Added _by_key() methods to allow partitioning of values to particular servers.

- MEMCACHED_DEFAILT_TIMEOUT is now set to a non -1 value.

- Performance improvements in get operations.

## v 0.11

> released 2007-11-26

- Added option to memcache_behavior_set() so that poll() can be timed out.

- Fixed memory leak in case of using memcached_fetch_result() where no value was returned.

- Bug fixed in memcached_connect() which would cause servers that did not need to be enabled to be enabled (performance issue).

- Rewrote bounds checking code for get calls.

- "make test" now starts its own memcached servers.

- Added Hseih hash (MEMCACHED_HASH_HSIEH), which is showing about 7% performance over standard hash.

## v 0.10

> released 2007-11-21

- Added append binary test.

- Added MEMCACHED_BEHAVIOR_CACHE_LOOKUPS behavior so that you can save on multiple DNS lookups.

- Added CAS support, though this is optional and must be enabled during runtime.

- Added the utility memerror to create human readable error strings from memcached errors (aka convert ints to strings)

- Fixed type in MEMCACHED_HOST_LOOKUP_FAILURE

- Fixed bug where hostname might not be null terminated

- Moved to using gethostbyname_r() on Linux to solve thread safety issue

- Added -rpath support for pkg-config

- Documentation fix for hash setting using memcached_behavior_set()

## v 0.9

> released 2007-11-15

- fix for when no servers are definied.

- different buffers are now kept for different connections to speed up async efforts

- Modified increment/decrement functions to return uint64_t values

- Fixed bug in cases where zero length keys were provided

- Thread cleanup issue in memslap

- No hostname lookup on reconnect

- Fix for flag settings (was doing hex by accident!)

- Support for 1.2.4 server additions "prepend" and "append" added.

- Added memcached_version()... not sure if I will make this public or not.

## v 0.8

> released 2007-11-05

- Adding support for CRC hash method

- Adding support for UNIX sockets

- Added additional HASHing methods of FNV1_64,FNV1A_64, FNV1_32, FNV1A_32

- Added pkgconfig support (PKG_CHECK_MODULES)

- Fixed conflict with defined type in MySQL

- Added memcached_result_st structure and functions to manipulate it.

## v 0.7

> released 2007-10-30

- Poved to poll() from select()

- Fixes in internal string class for allocation of large numbers of strings.

- memcached_mget() function now sends keys as it parses them instead of building strings as it goes.

- Propper flush now for making sure we get all IO sent even when in non-block mode.

- Added --enable-debug rule for configure

- All asserts() removed (hey this is going into production!)

## v 0.6

> released 2007-10-17

- get value returns are now null terminated (request by Cal Heldenbrand)

- Fixed connections for more hosts then two.

- Rewrite of the read/write IO systems to handle different sorts of host failures.

- Added man pages for all functions and tools

- Raised buffer size for readinng/writing to 16K

- You can now optionally set the socket size for recv/send via memached_behavior_set/get.

## v 0.5

> released 2007-10-09

- Ruby maintainer mentioned TCP_NODELAY patch he had added. Added this to C library as well. (Eric Hodel drbrain@segment7.net)

- Added support script for set_benchmark

- Updated memslap to allow testing of TCP_NODELAY

- Updated memslap to support --flush (aka dump memcache servers before testing)

- Fixed bug in multiple hosts not being activated

- Added environmental variable MEMCACHED_SERVERS which can be used to set the servers list.

- fixed memcached_stat method (and now memstat works)

- server connect now happens on demand.

- Help for all command line applications

## v 0.4

> released 2007-10-03

- Added buffered IO to write calls for keys

- Added buffered IO for reads

- memstat was broken (bad if/else on connect)

- New non-blocking IO (not default yet). Mucho faster

- Refactor of test system.

- memslap crash solved

## v 0.3

> released 2007-10-01

- Jeff Fisher guppy@techmonkeys.org provided a spec file

- Added "make rpm" around dist file

- Added support for Solaris

- Added support for DTrace

- Fixed read to be recv and write to be send

- Bug fix where memstat would core if no server was found

- Added memslap tool (load generator)

- Numerous bug fixes in library

- Added calls to library for creating host lists (see text cases to understand how to use this).

## v 0.2

> released 2007-09-27

- First public version