memcached是一套分布式的快取系统，当初是Danga Interactive为了LiveJournal所发展的，但目前被许多软件（如MediaWiki）所使用。这是一套开放源代码软件，以BSD license授权释出。
2012-07-31发布1.4.14.上一个版本是2012-02-02的1.4.13 下载地址： http://memcached.googlecode.com/files/memcached-1.4.14.tar.gz
此版本支持了新的Gcc,同时支持automake-1.12。
完全改进：
Fixes
fix compile issue with new GCC's
Added support for automake-1.12 in autogen.sh
Use Markdown for README.
Fixed issue with invalid binary protocol touch command expiration time (http://code.google.com/p/memcached/issues/detail?id=275)
Define touch command probe for DTrace support
Error and exit if we don't have hugetlb support (changes -L behavior)
update reassign/automove documentation
Remove USE_SYSTEM_MALLOC define
slab rebalancing from random class
split slab rebalance and automove threads
pre-split slab pages into slab freelists
Avoid race condition in test during pid creation by blind retrying
New Features
This release mainly features a number of small bugfixes, but also a change to slab rebalance behavior.
Previously, if you moved a slab page from one slab to another, you had to wait until that new page was fully used before moving another one. That wait has been removed, and you can move pages as fast as the system can ... move them.
A few new features as well:
slabs reassign
slabs reassign -1 15 will pick a page from any slab class and move it to class 15.
slabs automove
slabs automove 2 now enables an ultra aggressive page reassignment algorithm. On every eviction, it will try to move a slab page into that class. You should never run this in production unless you have a very, very good idea of what's going to happen. For most people who have spurious evictions everywhere, you'll end up mass evicting random data and hurting your hit rate. It can be useful to momentarily enable for emergency situations, or if you have a data access pattern where evictions should never happen.
This was work we were planning on doing already, but twitter's rewrite has people presently interested in trying it out. You've been warned.
主页：http://code.google.com/p/memcached/
下载：http://code.google.com/p/memcached/downloads/list
来自:开源中国社区
