1.什麼是Redis?
Redis是用C語言開發的一個開源的高性能鍵值對(key-value)數據庫。它經過提供多種鍵值數據類型來適應不一樣場景下的存儲需求,目前爲止Redis支持的鍵值數據類型以下:前端
2.redis的應用場景node
3.Redis單機版的安裝
redis是C語言開發,建議在linux上運行,本文使用Centos6.4做爲安裝環境。
安裝redis須要先將官網下載的源碼進行編譯,編譯依賴gcc環境,若是沒有gcc環境,須要安裝gcc:yum install gcc-c++linux
4.redis啓動c++
5.redis集羣web
6.建立集羣redis
>>> Creating cluster
Connecting to node 192.168.101.3:7001: OK
Connecting to node 192.168.101.3:7002: OK
Connecting to node 192.168.101.3:7003: OK
Connecting to node 192.168.101.3:7004: OK
Connecting to node 192.168.101.3:7005: OK
Connecting to node 192.168.101.3:7006: OK
>>> Performing hash slots allocation on 6 nodes...
Using 3 masters:
192.168.101.3:7001
192.168.101.3:7002
192.168.101.3:7003
Adding replica 192.168.101.3:7004 to 192.168.101.3:7001
Adding replica 192.168.101.3:7005 to 192.168.101.3:7002
Adding replica 192.168.101.3:7006 to 192.168.101.3:7003
M: cad9f7413ec6842c971dbcc2c48b4ca959eb5db4 192.168.101.3:7001
slots:0-5460 (5461 slots) master
M: 4e7c2b02f0c4f4cfe306d6ad13e0cfee90bf5841 192.168.101.3:7002
slots:5461-10922 (5462 slots) master
M: 1a8420896c3ff60b70c716e8480de8e50749ee65 192.168.101.3:7003
slots:10923-16383 (5461 slots) master
S: 69d94b4963fd94f315fba2b9f12fae1278184fe8 192.168.101.3:7004
replicates cad9f7413ec6842c971dbcc2c48b4ca959eb5db4
S: d2421a820cc23e17a01b597866fd0f750b698ac5 192.168.101.3:7005
replicates 4e7c2b02f0c4f4cfe306d6ad13e0cfee90bf5841
S: 444e7bedbdfa40714ee55cd3086b8f0d5511fe54 192.168.101.3:7006
replicates 1a8420896c3ff60b70c716e8480de8e50749ee65
Can I set the above configuration? (type 'yes' to accept): yes
>>> Nodes configuration updated
>>> Assign a different config epoch to each node
>>> Sending CLUSTER MEET messages to join the cluster
Waiting for the cluster to join...
>>> Performing Cluster Check (using node 192.168.101.3:7001)
M: cad9f7413ec6842c971dbcc2c48b4ca959eb5db4 192.168.101.3:7001
slots:0-5460 (5461 slots) master
M: 4e7c2b02f0c4f4cfe306d6ad13e0cfee90bf5841 192.168.101.3:7002
slots:5461-10922 (5462 slots) master
M: 1a8420896c3ff60b70c716e8480de8e50749ee65 192.168.101.3:7003
slots:10923-16383 (5461 slots) master
M: 69d94b4963fd94f315fba2b9f12fae1278184fe8 192.168.101.3:7004
slots: (0 slots) master
replicates cad9f7413ec6842c971dbcc2c48b4ca959eb5db4
M: d2421a820cc23e17a01b597866fd0f750b698ac5 192.168.101.3:7005
slots: (0 slots) master
replicates 4e7c2b02f0c4f4cfe306d6ad13e0cfee90bf5841
M: 444e7bedbdfa40714ee55cd3086b8f0d5511fe54 192.168.101.3:7006
slots: (0 slots) master
replicates 1a8420896c3ff60b70c716e8480de8e50749ee65
[OK] All nodes agree about slots configuration.
>>> Check for open slots...
>>> Check slots coverage...
[OK] All 16384 slots covered.
7.jedisCluster算法
-測試代碼spring
// 鏈接redis集羣
@Test
public void testJedisCluster() {
JedisPoolConfig config = new JedisPoolConfig();
// 最大鏈接數
config.setMaxTotal(30);
// 最大鏈接空閒數
config.setMaxIdle(2);
//集羣結點
Set<HostAndPort> jedisClusterNode = new HashSet<HostAndPort>();
jedisClusterNode.add(new HostAndPort("192.168.101.3", 7001));
jedisClusterNode.add(new HostAndPort("192.168.101.3", 7002));
jedisClusterNode.add(new HostAndPort("192.168.101.3", 7003));
jedisClusterNode.add(new HostAndPort("192.168.101.3", 7004));
jedisClusterNode.add(new HostAndPort("192.168.101.3", 7005));
jedisClusterNode.add(new HostAndPort("192.168.101.3", 7006));
JedisCluster jc = new JedisCluster(jedisClusterNode, config);
JedisCluster jcd = new JedisCluster(jedisClusterNode);
jcd.set("name", "zhangsan");
String value = jcd.get("name");
System.out.println(value);
}
<!-- 鏈接池配置 -->
<bean id="jedisPoolConfig" class="redis.clients.jedis.JedisPoolConfig">
<!-- 最大鏈接數 -->
<property name="maxTotal" value="30" />
<!-- 最大空閒鏈接數 -->
<property name="maxIdle" value="10" />
<!-- 每次釋放鏈接的最大數目 -->
<property name="numTestsPerEvictionRun" value="1024" />
<!-- 釋放鏈接的掃描間隔(毫秒) -->
<property name="timeBetweenEvictionRunsMillis" value="30000" />
<!-- 鏈接最小空閒時間 -->
<property name="minEvictableIdleTimeMillis" value="1800000" />
<!-- 鏈接空閒多久後釋放, 當空閒時間>該值 且 空閒鏈接>最大空閒鏈接數 時直接釋放 -->
<property name="softMinEvictableIdleTimeMillis" value="10000" />
<!-- 獲取鏈接時的最大等待毫秒數,小於零:阻塞不肯定的時間,默認-1 -->
<property name="maxWaitMillis" value="1500" />
<!-- 在獲取鏈接的時候檢查有效性, 默認false -->
<property name="testOnBorrow" value="true" />
<!-- 在空閒時檢查有效性, 默認false -->
<property name="testWhileIdle" value="true" />
<!--鏈接耗盡時是否阻塞, false報異常,ture阻塞直到超時, 默認true -->
<property name="blockWhenExhausted" value="false" />
</bean>
<!-- redis集羣 -->
<bean id="jedisCluster" class="redis.clients.jedis.JedisCluster">
<constructor-arg index="0">
<set>
<bean class="redis.clients.jedis.HostAndPort">
<constructor-arg index="0" value="192.168.101.3"></constructor-arg>
<constructor-arg index="1" value="7001"></constructor-arg>
</bean>
<bean class="redis.clients.jedis.HostAndPort">
<constructor-arg index="0" value="192.168.101.3"></constructor-arg>
<constructor-arg index="1" value="7002"></constructor-arg>
</bean>
<bean class="redis.clients.jedis.HostAndPort">
<constructor-arg index="0" value="192.168.101.3"></constructor-arg>
<constructor-arg index="1" value="7003"></constructor-arg>
</bean>
<bean class="redis.clients.jedis.HostAndPort">
<constructor-arg index="0" value="192.168.101.3"></constructor-arg>
<constructor-arg index="1" value="7004"></constructor-arg>
</bean>
<bean class="redis.clients.jedis.HostAndPort">
<constructor-arg index="0" value="192.168.101.3"></constructor-arg>
<constructor-arg index="1" value="7005"></constructor-arg>
</bean>
<bean class="redis.clients.jedis.HostAndPort"> <constructor-arg index="0" value="192.168.101.3"></constructor-arg>
<constructor-arg index="1" value="7006"></constructor-arg>
</bean>
</set>
</constructor-arg>
<constructor-arg index="1" ref="jedisPoolConfig"></constructor-arg>
</bean>
測試代碼數據庫
private ApplicationContext applicationContext;
@Before
public void init() {
applicationContext = new ClassPathXmlApplicationContext(
"classpath:applicationContext.xml");
}
//redis集羣
@Test
public void testJedisCluster() {
JedisCluster jedisCluster = (JedisCluster) applicationContext.getBean("jedisCluster");
jedisCluster.set("name", "zhangsan");
String value = jedisCluster.get("name");
System.out.println(value);
}