$ telnet localhost 11211Trying 127.0.0.1...Connected to localhost.Escape character is ‘^]‘.get fooVALUE foo 0 2hiENDstatsSTAT pid 8861(etc)

[root@localhost ~]# tar -zxvf libevent-2.0.21-stable.tar.gz...[root@localhost ~]# cd libevent-2.0.21-stable/[root@localhost libevent-2.0.21-stable]# ./configure...[root@localhost libevent-2.0.21-stable]# make...[root@localhost libevent-2.0.21-stable]# make install...

[root@localhost ~]# tar -xzvf memcached-1.4.20.tar.gz ...[root@localhost ~]# cd memcached-1.4.20/[root@localhost memcached-1.4.20]# ./configure...[root@localhost memcached-1.4.20]# make...[root@localhost memcached-1.4.20]# make install...

[root@localhost ~]# /usr/local/bin/memcached -h/usr/local/bin/memcached: error while loading shared libraries: libevent-2.0.so.5: cannot open shared object file: No such file or directory[root@localhost ~]# ldd /usr/local/bin/memcached         linux-vdso.so.1 =>  (0x00007fffd5b69000)        libevent-2.0.so.5 => not found        librt.so.1 => /lib64/librt.so.1 (0x0000003a44600000)        libpthread.so.0 => /lib64/libpthread.so.0 (0x0000003a43e00000)        libc.so.6 => /lib64/libc.so.6 (0x0000003a43a00000)        /lib64/ld-linux-x86-64.so.2 (0x0000003a43200000)[root@localhost ~]# LD_DEBUG=libs /usr/local/bin/memcached -v      7715:     find library=libevent-2.0.so.5 [0]; searching      7715:      search cache=/etc/ld.so.cache      7715:      search path=/lib64/tls/x86_64:/lib64/tls:/lib64/x86_64:/lib64:/usr/lib64/tls/x86_64:/usr/lib64/tls:/usr/lib64/x86_64:/usr/lib64                (system search path)      7715:       trying file=/lib64/tls/x86_64/libevent-2.0.so.5      7715:       trying file=/lib64/tls/libevent-2.0.so.5      7715:       trying file=/lib64/x86_64/libevent-2.0.so.5      7715:       trying file=/lib64/libevent-2.0.so.5      7715:       trying file=/usr/lib64/tls/x86_64/libevent-2.0.so.5      7715:       trying file=/usr/lib64/tls/libevent-2.0.so.5      7715:       trying file=/usr/lib64/x86_64/libevent-2.0.so.5      7715:       trying file=/usr/lib64/libevent-2.0.so.5      7715:     /usr/local/bin/memcached: error while loading shared libraries: libevent-2.0.so.5: cannot open shared object file: No such file or directory[root@localhost ~]# whereis libevent-2.0.so.5libevent-2.0.so: /usr/local/lib/libevent-2.0.so.5[root@localhost ~]# /usr/local/bin/memcached -h[root@localhost ~]# /usr/local/bin/memcached -hmemcached 1.4.20-p <num>      TCP port number to listen on (default: 11211)-U <num>      UDP port number to listen on (default: 11211, 0 is off)-s <file>     UNIX socket path to listen on (disables network support)-A            enable ascii "shutdown" command-a <mask>     access mask for UNIX socket, in octal (default: 0700)-l <addr>     interface to listen on (default: INADDR_ANY, all addresses)              <addr> may be specified as host:port. If you don‘t specify              a port number, the value you specified with -p or -U is              used. You may specify multiple addresses separated by comma              or by using -l multiple times-d            run as a daemon-r            maximize core file limit-u <username> assume identity of <username> (only when run as root)-m <num>      max memory to use for items in megabytes (default: 64 MB)-M            return error on memory exhausted (rather than removing items)-c <num>      max simultaneous connections (default: 1024)-k            lock down all paged memory.  Note that there is a              limit on how much memory you may lock.  Trying to              allocate more than that would fail, so be sure you              set the limit correctly for the user you started              the daemon with (not for -u <username> user;              under sh this is done with ‘ulimit -S -l NUM_KB‘).-v            verbose (print errors/warnings while in event loop)-vv           very verbose (also print client commands/reponses)-vvv          extremely verbose (also print internal state transitions)-h            print this help and exit-i            print memcached and libevent license-P <file>     save PID in <file>, only used with -d option-f <factor>   chunk size growth factor (default: 1.25)-n <bytes>    minimum space allocated for key+value+flags (default: 48)-L            Try to use large memory pages (if available). Increasing              the memory page size could reduce the number of TLB misses              and improve the performance. In order to get large pages              from the OS, memcached will allocate the total item-cache              in one large chunk.-D <char>     Use <char> as the delimiter between key prefixes and IDs.              This is used for per-prefix stats reporting. The default is              ":" (colon). If this option is specified, stats collection              is turned on automatically; if not, then it may be turned on              by sending the "stats detail on" command to the server.-t <num>      number of threads to use (default: 4)-R            Maximum number of requests per event, limits the number of              requests process for a given connection to prevent               starvation (default: 20)-C            Disable use of CAS-b            Set the backlog queue limit (default: 1024)-B            Binding protocol - one of ascii, binary, or auto (default)-I            Override the size of each slab page. Adjusts max item size              (default: 1mb, min: 1k, max: 128m)-F            Disable flush_all command-o            Comma separated list of extended or experimental options              - (EXPERIMENTAL) maxconns_fast: immediately close new                connections if over maxconns limit              - hashpower: An integer multiplier for how large the hash                table should be. Can be grown at runtime if not big enough.                Set this based on "STAT hash_power_level" before a                 restart.              - tail_repair_time: Time in seconds that indicates how long to wait before                forcefully taking over the LRU tail item whose refcount has leaked.                The default is 3 hours.              - hash_algorithm: The hash table algorithm                default is jenkins hash. options: jenkins, murmur3              - lru_crawler: Enable LRU Crawler background thread              - lru_crawler_sleep: Microseconds to sleep between items                default is 100.              - lru_crawler_tocrawl: Max items to crawl per slab per run                default is 0 (unlimited)

[root@localhost ~]# /usr/local/bin/memcached -p 11211 -m 64m -u root -vvslab class   1: chunk size        96 perslab   10922slab class   2: chunk size       120 perslab    8738slab class   3: chunk size       152 perslab    6898slab class   4: chunk size       192 perslab    5461slab class   5: chunk size       240 perslab    4369slab class   6: chunk size       304 perslab    3449slab class   7: chunk size       384 perslab    2730slab class   8: chunk size       480 perslab    2184slab class   9: chunk size       600 perslab    1747slab class  10: chunk size       752 perslab    1394slab class  11: chunk size       944 perslab    1110slab class  12: chunk size      1184 perslab     885slab class  13: chunk size      1480 perslab     708slab class  14: chunk size      1856 perslab     564slab class  15: chunk size      2320 perslab     451slab class  16: chunk size      2904 perslab     361slab class  17: chunk size      3632 perslab     288slab class  18: chunk size      4544 perslab     230slab class  19: chunk size      5680 perslab     184slab class  20: chunk size      7104 perslab     147slab class  21: chunk size      8880 perslab     118slab class  22: chunk size     11104 perslab      94slab class  23: chunk size     13880 perslab      75slab class  24: chunk size     17352 perslab      60slab class  25: chunk size     21696 perslab      48slab class  26: chunk size     27120 perslab      38slab class  27: chunk size     33904 perslab      30slab class  28: chunk size     42384 perslab      24slab class  29: chunk size     52984 perslab      19slab class  30: chunk size     66232 perslab      15slab class  31: chunk size     82792 perslab      12slab class  32: chunk size    103496 perslab      10slab class  33: chunk size    129376 perslab       8slab class  34: chunk size    161720 perslab       6slab class  35: chunk size    202152 perslab       5slab class  36: chunk size    252696 perslab       4slab class  37: chunk size    315872 perslab       3slab class  38: chunk size    394840 perslab       2slab class  39: chunk size    493552 perslab       2slab class  40: chunk size    616944 perslab       1slab class  41: chunk size    771184 perslab       1slab class  42: chunk size   1048576 perslab       1<26 server listening (auto-negotiate)<27 server listening (auto-negotiate)<28 send buffer was 262144, now 268435456<28 server listening (udp)<29 server listening (udp)<32 send buffer was 262144, now 268435456<32 server listening (udp)<30 server listening (udp)<33 server listening (udp)<34 server listening (udp)<31 server listening (udp)<35 server listening (udp)

 1         String[] addr = { "10.108.1.97:11211" }; 2         Integer[] weights = { 3 }; 3         SockIOPool pool = SockIOPool.getInstance(); 4         pool.setServers(addr); 5         pool.setWeights(weights); 6         pool.setInitConn(5); 7         pool.setMinConn(5); 8         pool.setMaxConn(200); 9         pool.setMaxIdle(1000 * 30 * 30);10         pool.setMaintSleep(30);11         pool.setNagle(false);12         pool.setSocketTO(30);13         pool.setSocketConnectTO(0);14         pool.initialize();15 16         MemCachedClient client = new MemCachedClient();17 18         client.set("user", "Jobs");19 20         // 将数据放入缓存,并设置失效时间21         // Date date = new Date(2000000);22         // client.set("test1", "test1", date);23 24         // 删除缓存数据25         // client.delete("test1");26         // client.delete("test2");27         // client.flushAll();28 29         // 获取缓存数据30         System.out.println((String) client.get("user"));