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