学步园

  术语：Memcached

  引用官方的话What is Memcached?

  Free & open source, high-performance, distributed memory object caching system, generic in nature, but intended for use in speeding up dynamic web applications by alleviating database load.

 步骤1：安装libevent (我安装的是libevent-1.4.5)

 官方http://www.monkey.org/~provos/libevent/

 wget -c http://monkey.org/~provos/libevent-1.4.5-stable.tar.gz

 tar -xzvf libevent-1.4.5-stable.tar.gz

 cd libevent-1.4.5-stable

 ./configure --prefix=/usr/local/libevent

 make
 make install

步骤2：安装memcached-1.4.5.tar.gz

 http://memcached.googlecode.com/files/memcached-1.4.5.tar.gz

 ./configure --prefix=/usr/local/memcache --with-libevent=/usr/local/libevent

 make 
 make install
 

 步骤3:启动memcached

 ln -s /usr/local/libevent/lib/libevent-1.4.so.2 /usr/lib/libevent-1.4.so.2

 /usr/local/memcache/bin/memcached -d -m 100  -u root -p 12000 -c 256 -P /tmp/memcached.pid

启动参数说明：

memcached 1.4.5<br /> -p <num> TCP port number to listen on (default: 11211)<br /> -U <num> UDP port number to listen on (default: 11211, 0 is off)<br /> -s <file> UNIX socket path to listen on (disables network support)<br /> -a <mask> access mask for UNIX socket, in octal (default: 0700)<br /> -l <ip_addr> interface to listen on (default: INADDR_ANY, all addresses)<br /> -d run as a daemon<br /> -r maximize core file limit<br /> -u <username> assume identity of <username> (only when run as root)<br /> -m <num> max memory to use for items in megabytes (default: 64 MB)<br /> -M return error on memory exhausted (rather than removing items)<br /> -c <num> max simultaneous connections (default: 1024)<br /> -k lock down all paged memory. Note that there is a<br /> limit on how much memory you may lock. Trying to<br /> allocate more than that would fail, so be sure you<br /> set the limit correctly for the user you started<br /> the daemon with (not for -u <username> user;<br /> under sh this is done with 'ulimit -S -l NUM_KB').<br /> -v verbose (print errors/warnings while in event loop)<br /> -vv very verbose (also print client commands/reponses)<br /> -vvv extremely verbose (also print internal state transitions)<br /> -h print this help and exit<br /> -i print memcached and libevent license<br /> -P <file> save PID in <file>, only used with -d option<br /> -f <factor> chunk size growth factor (default: 1.25)<br /> -n <bytes> minimum space allocated for key+value+flags (default: 48)<br /> -L Try to use large memory pages (if available). Increasing<br /> the memory page size could reduce the number of TLB misses<br /> and improve the performance. In order to get large pages<br /> from the OS, memcached will allocate the total item-cache<br /> in one large chunk.<br /> -D <char> Use <char> as the delimiter between key prefixes and IDs.<br /> This is used for per-prefix stats reporting. The default is<br /> ":" (colon). If this option is specified, stats collection<br /> is turned on automatically; if not, then it may be turned on<br /> by sending the "stats detail on" command to the server.<br /> -t <num> number of threads to use (default: 4)<br /> -R Maximum number of requests per event, limits the number of<br /> requests process for a given connection to prevent<br /> starvation (default: 20)<br /> -C Disable use of CAS<br /> -b Set the backlog queue limit (default: 1024)<br /> -B Binding protocol - one of ascii, binary, or auto (default)<br /> -I Override the size of each slab page. Adjusts max item size<br /> (default: 1mb, min: 1k, max: 128m)</p> <p>