分布式的緩存系統 Memcached 1.4.15 發布

今天發布1.4.15，memcached是Memcached 是一個高性能的分布式內存對象緩存系統，用于動態Web應用以減輕數據庫負載。它通過在內存中緩存數據和對象來減少讀取數據庫的次數。

memcached具有多種語言的客戶端開發包，包括：Perl/PHP/JAVA/C/Python/Ruby/C#/MySQL/

下載地址： http://memcached.googlecode.com/files/memcached-1.4.15.tar.gz

此版本增強了多線程下的讀寫性能。

修復情況

• Add some mild thread documentation
• README.md was missing from dist tarball
•  Issue 286 : --disable-coverage drops "-pthread" option
• Reduce odds of getting OOM errors in some odd cases

新的特性：

Thread scalability is much improved for reads, and somewhat improved for writes. In a pure read-only situation on a dual socket six core NUMA machine I've tested key fetch rates around 13.6 million keys per second.

More tuning is necessary and you'd get significant lag at that rate, but that shows the theoretical limit of the locks.