转：Memcached笔记——（一）安装&常规错误&监控 一、下载
wget http://cloud.github.com/downloads/libevent/libevent/libevent-2.0.17-stable.tar.gz wget http://memcached.googlecode.com/files/memcached-1.4.13.tar.gz 二、安装 tar zxvf libevent-2.0.17-stable.tar.gz ./configure --prefix=/usr && make && make install --prefix ，后面配置memcached的时候就有必要用到。 tar zxvf memcached-1.4.13.tar.gz ./configure --with-libevent=/usr/lib && make && make install libevent 的路径，否则启动的时候就有找不到libevent的so文件的错误！ memcached -d -m 512 -p 11211 -u root -c 256 -P /var/run/memcached.pid kill -9 `cat /var/run/memcached.pid` telnet xxx.xxx.xxx.xxx 11211 三、系统服务
/etc/init.d/memcahed 这个文件，然后赋予其可执行权限： touch /etc/init.d/memcached chmod +x /etc/init.d/memcached #!/bin/bash # v.0.0.1 # create by snowolf at 2012.5.25 # # memcached - This shell script takes care of starting and stopping memcached. # # chkconfig: - 90 10 # description: Memcache provides fast memory based storage. # processname: memcached memcached_path="/usr/local/bin/memcached" memcached_pid="/var/run/memcached.pid" memcached_memory="1024" # Source function library. . /etc/rc.d/init.d/functions [ -x $memcached_path ] || exit 0 RETVAL=0 prog="memcached" # Start daemons. start() { if [ -e $memcached_pid -a ! -z $memcached_pid ];then echo $prog" already running...." exit 1 fi echo -n $"Starting $prog " # Single instance for all caches $memcached_path -m $memcached_memory -l 0.0.0.0 -p 11211 -u root -d -P $memcached_pid RETVAL=$? [ $RETVAL -eq 0 ] && { touch /var/lock/subsys/$prog success $"$prog" } echo return $RETVAL } # Stop daemons. stop() { echo -n $"Stopping $prog " killproc -d 10 $memcached_path echo [ $RETVAL = 0 ] && rm -f $memcached_pid /var/lock/subsys/$prog RETVAL=$? return $RETVAL } # See how we were called. case "$1" in start) start ;; stop) stop ;; status) status $prog RETVAL=$? ;; restart) stop start ;; *) echo $"Usage: $0 {start|stop|status|restart}" exit 1 esac exit $RETVAL chkconfig --add memcached chkconfig memcached on service memcached start|stop|status|restart 控制memcached了！ 四、常规错误 /usr/lib 下。错就错在Linux是64bit系统，如果没有指定libevent路径，memcached就会去/usr/lib64 下去找。 whereis libevent-2.0.so.5 ldd /usr/local/bin/memcached libevent-2.0.so.5 LD_DEBUG=libs /usr/local/bin/memcached -v ln -s /usr/lib/libevent-2.0.so.5 /usr/lib64/libevent-2.0.so.5 ldd /usr/local/bin/memcached 五、监控 define('ADMIN_USERNAME','memcache'); // Admin Username define('ADMIN_PASSWORD','password'); // Admin Password define('DATE_FORMAT','Y/m/d H:i:s'); define('GRAPH_SIZE',200); define('MAX_ITEM_DUMP',50); $MEMCACHE_SERVERS[] = 'mymemcache-server1:11211'; // add more as an array $MEMCACHE_SERVERS[] = 'mymemcache-server2:11211'; // add more as an array @default_instances 或使用--instances参数： perl memcache-top-v0.6 --instances 10.11.155.26 10.11.155.41
Memcached笔记——（二）XMemcached&Spring集成 一、Memcached Client简要介绍 Memcached Client for Java SpyMemcached XMemcached Memcached Client for Java 比 SpyMemcached更稳定、更早、更广泛； SpyMemcached 比 Memcached Client for Java更高效； XMemcached 比 SpyMemcache并发效果更好。 二、XMemcached特性 高性能 支持完整的memcached文本协议,二进制协议。 支持JMX，可以通过MBean调整性能参数、动态添加/移除server、查看统计等。 支持客户端统计 支持memcached节点的动态增减。 支持memcached分布:余数分布和一致性哈希分布。 更多的性能调整选项。 三、XMemcached简单实现 MemcachedClientBuilder 是MemcachedClient核心接口，用来控制Client的构建（build()方法）和关闭（shutdown()方法）。 XMemcachedClientBuilder 一般通过构造方法配置地址列表，通常还要配置权重，代码如下： public if null for this null } } } public int if null for this null } } this }
MemcachedClient import static import import import import import import import import import public class @Test public void MemcachedClientBuilder builder = new AddrUtil.getAddresses("10.11.155.26:11211 10.11.155.41:11211 10.10.76.31:11211 10.10.76.35:11211" ), new int 1 , 1 , 1 , 1 }); // 设置连接池大小，即客户端个数 builder.setConnectionPoolSize(50 ); // 宕机报警 builder.setFailureMode(true // 使用二进制文件 builder.setCommandFactory(new MemcachedClient memcachedClient = null try memcachedClient = builder.build(); try // 设置/获取 memcachedClient.set("zlex" , 36000 , "set/get" ); assertEquals("set/get" , memcachedClient.get("zlex" )); // 替换 memcachedClient.replace("zlex" , 36000 , "replace" ); assertEquals("replace" , memcachedClient.get("zlex" )); // 移除 memcachedClient.delete("zlex" ); assertNull(memcachedClient.get("zlex" )); } catch // TODO Auto-generated catch block e.printStackTrace(); } catch // TODO Auto-generated catch block e.printStackTrace(); } catch // TODO Auto-generated catch block e.printStackTrace(); } } catch // TODO Auto-generated catch block e.printStackTrace(); } finally if null try memcachedClient.shutdown(); } catch // TODO Auto-generated catch block e.printStackTrace(); } } } } } 四、XMemcached与Spring集成 #连接池大小即客户端个数 memcached.connectionPoolSize=50 memcached.failureMode=true #server1 memcached.server1.host=10.11 .155.26 memcached.server1.port=11211 memcached.server1.weight=4 #server2 memcached.server2.host=10.11 .155.41 memcached.server2.port=11211 memcached.server2.weight=3 #server3 memcached.server3.host=10.10 .76.31 memcached.server3.port=11211 memcached.server3.weight=2 #server4 memcached.server4.host=10.10 .76.35 memcached.server4.port=11211 memcached.server4.weight=1 <? xml version ="1.0" encoding ="UTF-8" ?> < beans xmlns ="http://www.springframework.org/schema/beans" xmlns:xsi ="http://www.w3.org/2001/XMLSchema-instance" xmlns:context ="http://www.springframework.org/schema/context" xmlns:p ="http://www.springframework.org/schema/p" xsi:schemaLocation ="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd http://www.springframework.org/schema/context http://www.springframework.org/schema/context/spring-context.xsd"> <!-- http://code.google.com/p/xmemcached/wiki/Spring_Integration --> < context:property-placeholder location ="memcached.properties" /> < bean id ="memcachedClientBuilder" class ="net.rubyeye.xmemcached.XMemcachedClientBuilder" p:connectionPoolSize ="${memcached.connectionPoolSize}" p:failureMode ="${memcached.failureMode}" > <!-- XMemcachedClientBuilder have two arguments.First is server list,and second is weights array. --> < constructor-arg > < list > < bean class ="java.net.InetSocketAddress" > < constructor-arg > < value > </ value > </ constructor-arg > < constructor-arg > < value > </ value > </ constructor-arg > </ bean > < bean class ="java.net.InetSocketAddress" > < constructor-arg > < value > </ value > </ constructor-arg > < constructor-arg > < value > </ value > </ constructor-arg > </ bean > < bean class ="java.net.InetSocketAddress" > < constructor-arg > < value > </ value > </ constructor-arg > < constructor-arg > < value > </ value > </ constructor-arg > </ bean > < bean class ="java.net.InetSocketAddress" > < constructor-arg > < value > </ value > </ constructor-arg > < constructor-arg > < value > </ value > </ constructor-arg > </ bean > </ list > </ constructor-arg > < constructor-arg > < list > < value > </ value > < value > </ value > < value > </ value > < value > </ value > </ list > </ constructor-arg > < property name ="commandFactory" > < bean class ="net.rubyeye.xmemcached.command.TextCommandFactory" /> </ property > < property name ="sessionLocator" > < bean class ="net.rubyeye.xmemcached.impl.KetamaMemcachedSessionLocator" /> </ property > < property name ="transcoder" > < bean class ="net.rubyeye.xmemcached.transcoders.SerializingTranscoder" /> </ property > </ bean > <!-- Use factory bean to build memcached client --> < bean id ="memcachedClient" factory-bean ="memcachedClientBuilder" factory-method ="build" destroy-method ="shutdown" /> </ beans > memcachedClientBuilder 节点完成MemcachedClientBuilder ，然后通过memcachedClient 节点配置factory-method ，调用MemcachedClientBuilder 的build()方法产生MemcachedClient ，并配置destroy-method 进行关闭。
或者需要另一个代理Bean包装一下？ import static import import import import import import import public class private private @Before public void app = new "applicationContext.xml" ); memcachedClient = (MemcachedClient) app.getBean("memcachedClient" ); } @Test public void try // 设置/获取 memcachedClient.set("zlex" , 36000 , "set/get" ); assertEquals("set/get" , memcachedClient.get("zlex" )); // 替换 memcachedClient.replace("zlex" , 36000 , "replace" ); assertEquals("replace" , memcachedClient.get("zlex" )); // 移除 memcachedClient.delete("zlex" ); assertNull(memcachedClient.get("zlex" )); } catch // TODO Auto-generated catch block e.printStackTrace(); } catch // TODO Auto-generated catch block e.printStackTrace(); } catch // TODO Auto-generated catch block e.printStackTrace(); } } }
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发表于 2017-4-14 11:40:10
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