MYCAT使用篇(1)

安装mycat

mycat下载，windows
http://dl.mycat.io/1.6-RELEASE/ 下载后解压

JDK检查安装

检查java的环境变量是否是1.7以上，如果不是安装1.7以上的版本

使用出现的问题

1.启动时候出现Error occurred during initialization of VM Could not reserve enough space for 2097152KB object heap
设置的默认的-Xms1G -Xmx2G 看看你的电脑还能分配那么多么，如果不能就调的小点

cmd找到对应安装路径

D:\environment\mycat\bin执行mycat.bat install 
mycat.bat start

2.启动mycat出现不能加载jvm问题
查看对应的日志信息出现不能加载jvm，修改以下的配置文件wrapper.conf

wrapper.java.additional.10=-Xmx4G
wrapper.java.additional.11=-Xms1G
修改为以下，不然会报jvm加载不了
wrapper.java.additional.10=-Xmx512m
wrapper.java.additional.11=-Xms128m

使用资源

配置服务器，资源的问题我配置的同样的节点
服务器A mysql 59.110.174.202
服务器A mysql 59.110.174.202
服务器A mysql 59.110.174.202

使用配置

mycat的server.xml配置

 <?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE mycat:server SYSTEM "server.dtd">
<mycat:server xmlns:mycat="http://io.mycat/">
    <system>
    <property name="useSqlStat">0</property>  <!-- 1为开启实时统计、0为关闭 -->
    <property name="useGlobleTableCheck">0</property>  <!-- 1为开启全加班一致性检测、0为关闭 -->

        <property name="sequnceHandlerType">2</property>
      <!--  <property name="useCompression">1</property>--> <!--1为开启mysql压缩协议-->
        <!--  <property name="fakeMySQLVersion">5.6.20</property>--> <!--设置模拟的MySQL版本号-->
    <!-- <property name="processorBufferChunk">40960</property> -->
    <!-- 
    <property name="processors">1</property> 
    <property name="processorExecutor">32</property> 
     -->
        <!--默认为type 0: DirectByteBufferPool | type 1 ByteBufferArena-->
        <property name="processorBufferPoolType">0</property>
        <!--默认是65535 64K 用于sql解析时最大文本长度 -->
        <!--<property name="maxStringLiteralLength">65535</property>-->
        <!--<property name="sequnceHandlerType">0</property>-->
        <!--<property name="backSocketNoDelay">1</property>-->
        <!--<property name="frontSocketNoDelay">1</property>-->
        <!--<property name="processorExecutor">16</property>-->
        <!--
            <property name="serverPort">8066</property> <property name="managerPort">9066</property> 
            <property name="idleTimeout">300000</property> <property name="bindIp">0.0.0.0</property> 
            <property name="frontWriteQueueSize">4096</property> <property name="processors">32</property> -->
        <!--分布式事务开关，0为不过滤分布式事务，1为过滤分布式事务（如果分布式事务内只涉及全局表，则不过滤），2为不过滤分布式事务,但是记录分布式事务日志-->
        <property name="handleDistributedTransactions">0</property>

            <!--
            off heap for merge/order/group/limit      1开启   0关闭
        -->
        <property name="useOffHeapForMerge">1</property>
        <!--
            单位为m
        -->
        <property name="memoryPageSize">1m</property>
        <!--
            单位为k
        -->
        <property name="spillsFileBufferSize">1k</property>
        <property name="useStreamOutput">0</property>
        <!--
            单位为m
        -->
        <property name="systemReserveMemorySize">384m</property>
        <!--是否采用zookeeper协调切换  -->
        <property name="useZKSwitch">true</property>
    </system>

    <!-- 全局SQL防火墙设置 -->
    <!-- 
    <firewall> 
       <whitehost>
          <host host="127.0.0.1" user="mycat"/>
          <host host="127.0.0.2" user="mycat"/>
       </whitehost>
       <blacklist check="false">
       </blacklist>
    </firewall>
    -->
    <user name="root">
        <property name="password">123456</property>
        <property name="schemas">test</property>

        <privileges check="false">
            <schema name="TESTDB" dml="0110" >
                <table name="tb01" dml="0000"></table>
                <table name="tb02" dml="1111"></table>
            </schema>
        </privileges>       
         -->
    </user>
    <user name="user">
        <property name="password">user</property>
        <property name="schemas">test</property>
        <property name="readOnly">true</property>
    </user>
</mycat:server>

schema.xml是数据库配置

<?xml version="1.0"?>
<!DOCTYPE mycat:schema SYSTEM "schema.dtd">
<mycat:schema xmlns:mycat="http://io.mycat/">
    <schema name="test" checkSQLschema="false" sqlMaxLimit="100">
        <!-- auto sharding by id (long) -->
        <table name="travelrecord" dataNode="dn1,dn2,dn3" rule="auto-sharding-long" />
    </schema>
    <!-- <dataNode name="dn1$0-743" dataHost="localhost1" database="db$0-743"
        /> -->
    <dataNode name="dn1" dataHost="localhost1" database="db1" />
    <dataNode name="dn2" dataHost="localhost2" database="db2" />
    <dataNode name="dn3" dataHost="localhost3" database="db3" />

    <dataHost name="localhost1" maxCon="1000" minCon="10" balance="0"
              writeType="0" dbType="mysql" dbDriver="native" switchType="1"  slaveThreshold="100">
        <heartbeat>select user()</heartbeat>
        <!-- can have multi write hosts -->
        <writeHost host="hostM1" url="59.110.174.202:3306" user="root"
                   password="123456">
        </writeHost>
    </dataHost>
    <dataHost name="localhost2" maxCon="1000" minCon="10" balance="0"
              writeType="0" dbType="mysql" dbDriver="native" switchType="1"  slaveThreshold="100">
        <heartbeat>select user()</heartbeat>
        <!-- can have multi write hosts -->
        <writeHost host="hostM2" url="59.110.174.202:3306" user="root"
                   password="123456">
        </writeHost>
    </dataHost>
    <dataHost name="localhost3" maxCon="1000" minCon="10" balance="0"
              writeType="0" dbType="mysql" dbDriver="native" switchType="1"  slaveThreshold="100">
        <heartbeat>select user()</heartbeat>
        <!-- can have multi write hosts -->
        <writeHost host="hostM3" url="59.110.174.202:3306" user="root"
                   password="123456">
        </writeHost>
    </dataHost>
</mycat:schema>

启动mycat

会看到如下的提示，如果启动过程中出现fail,查看对应的logs

D:\environment\mycat>mycat.bat start
wrapper  | Starting the Mycat-server serv
wrapper  | Waiting to start...
wrapper  | Mycat-server started.

看到以上的部分就说明mycat已经安装好了。