Mycat安装启动及主从读写分离简介
Mycat安装启动
Mycat使用Java编写，所以需要优先安装jdk，此处略过,本文使用版本如下：
如果未安装jdk，请提前下载：
https://www.oracle.com/cn/java/technologies/javase/javase8-archive-downloads.html
安装步骤我的Linux专栏有安装说明
成功如图所示：
切换到/opt目录，使用wget 下载压缩包
[root@mycat ~]# cd /opt/
[root@mycat opt]# wget http://dl.mycat.org.cn/1.6-RELEASE/Mycat-server-1.6-RELEASE-20161028204710-linux.tar.gz
--2021-06-14 21:54:21-- http://dl.mycat.org.cn/1.6-RELEASE/Mycat-server-1.6-RELEASE-20161028204710-linux.tar.gz
正在解析主机 dl.mycat.org.cn (dl.mycat.org.cn)... 210.51.26.184
正在连接 dl.mycat.org.cn (dl.mycat.org.cn)|210.51.26.184|:80... 已连接。
已发出 HTTP 请求，正在等待回应... 200 OK
长度：15662280 (15M) [application/octet-stream]
正在保存至: “Mycat-server-1.6-RELEASE-20161028204710-linux.tar.gz”
100%[=====================================================================================================================================================>] 15,662,280 4.18MB/s 用时 4.5s
2021-06-14 21:54:26 (3.32 MB/s) - 已保存 “Mycat-server-1.6-RELEASE-20161028204710-linux.tar.gz” [15662280/15662280])
[root@mycat opt]# ll |grep My
-rw-r--r--. 1 root root 15662280 10月 28 2016 Mycat-server-1.6-RELEASE-20161028204710-linux.tar.gz
[root@mycat opt]# tar -zxvf Mycat-server-1.6-RELEASE-20161028204710-linux.tar.gz
mycat/bin/wrapper-linux-ppc-64
mycat/bin/wrapper-linux-x86-64
mycat/bin/wrapper-linux-x86-32
mycat/bin/mycat
mycat/lib/zookeeper-3.4.6.jar
mycat/lib/jline-0.9.94.jar
mycat/lib/ehcache-core-2.6.11.jar
mycat/lib/log4j-1.2.17.jar
mycat/lib/fastjson-1.2.12.jar
mycat/lib/curator-client-2.11.0.jar
mycat/lib/joda-time-2.9.3.jar
mycat/lib/log4j-slf4j-impl-2.5.jar
mycat/lib/libwrapper-linux-x86-32.so
mycat/lib/netty-3.7.0.Final.jar
mycat/lib/druid-1.0.26.jar
mycat/lib/log4j-api-2.5.jar
mycat/lib/mapdb-1.0.7.jar
mycat/lib/slf4j-api-1.6.1.jar
mycat/lib/univocity-parsers-2.2.1.jar
mycat/lib/hamcrest-core-1.3.jar
mycat/lib/Mycat-server-1.6-RELEASE.jar
mycat/lib/objenesis-1.2.jar
mycat/lib/leveldb-api-0.7.jar
mycat/lib/hamcrest-library-1.3.jar
mycat/lib/wrapper.jar
mycat/lib/commons-lang-2.6.jar
mycat/lib/reflectasm-1.03.jar
mycat/lib/mongo-java-driver-2.11.4.jar
mycat/lib/guava-19.0.jar
mycat/lib/curator-recipes-2.11.0.jar
mycat/lib/curator-framework-2.11.0.jar
mycat/lib/libwrapper-linux-ppc-64.so
mycat/lib/log4j-core-2.5.jar
mycat/lib/leveldb-0.7.jar
mycat/lib/sequoiadb-driver-1.12.jar
mycat/lib/mysql-binlog-connector-java-0.4.1.jar
mycat/lib/kryo-2.10.jar
mycat/lib/jsr305-2.0.3.jar
mycat/lib/commons-collections-3.2.1.jar
mycat/lib/disruptor-3.3.4.jar
mycat/lib/log4j-1.2-api-2.5.jar
mycat/lib/velocity-1.7.jar
mycat/lib/libwrapper-linux-x86-64.so
mycat/lib/dom4j-1.6.1.jar
mycat/lib/minlog-1.2.jar
mycat/lib/asm-4.0.jar
mycat/conf/wrapper.conf
mycat/conf/
mycat/conf/zkconf/
mycat/conf/zkdownload/
mycat/conf/sequence_time_conf.properties
mycat/conf/sharding-by-enum.txt
mycat/conf/migrateTables.properties
mycat/conf/zkconf/sequence_time_conf.properties
mycat/conf/zkconf/sharding-by-enum.txt
mycat/conf/zkconf/ehcache.xml
mycat/conf/zkconf/index_to_charset.properties
mycat/conf/zkconf/partition-range-mod.txt
mycat/conf/zkconf/sequence_db_conf.properties
mycat/conf/zkconf/sequence_time_conf-mycat_fz_01.properties
mycat/conf/zkconf/cacheservice.properties
mycat/conf/zkconf/partition-hash-int.txt
mycat/conf/zkconf/autopartition-long.txt
mycat/conf/zkconf/server-mycat_fz_01.xml
mycat/conf/zkconf/auto-sharding-long.txt
mycat/conf/zkconf/rule.xml
mycat/conf/zkconf/auto-sharding-rang-mod.txt
mycat/conf/zkconf/sequence_distributed_conf.properties
mycat/conf/zkconf/sequence_distributed_conf-mycat_fz_01.properties
mycat/conf/zkconf/sequence_conf.properties
mycat/conf/zkconf/schema.xml
mycat/conf/zkconf/server.xml
mycat/conf/ehcache.xml
mycat/conf/index_to_charset.properties
mycat/conf/partition-range-mod.txt
mycat/conf/sequence_db_conf.properties
mycat/conf/cacheservice.properties
mycat/conf/partition-hash-int.txt
mycat/conf/autopartition-long.txt
mycat/conf/auto-sharding-long.txt
mycat/conf/rule.xml
mycat/conf/auto-sharding-rang-mod.txt
mycat/conf/sequence_distributed_conf.properties
mycat/conf/sequence_conf.properties
mycat/conf/myid.properties
mycat/conf/schema.xml
mycat/conf/zkdownload/auto-sharding-long.txt
mycat/conf/server.xml
mycat/version.txt
mycat/conf/log4j2.xml
mycat/bin/init_zk_data.sh
mycat/bin/startup_nowrap.sh
mycat/bin/dataMigrate.sh
mycat/bin/rehash.sh
mycat/logs/
mycat/catlet/
[root@mycat opt]# ll
总用量 30352
drwx--x--x. 4 root root 28 6月 6 10:02 containerd
drwxr-xr-x. 5 10143 10143 129 4月 8 03:26 jdk1.8.0_291
-rw-r--r--. 1 root root 2641920 5月 26 09:19 jdk-8u291-linux-x64.tar.gz
drwxr-xr-x. 7 root root 85 6月 14 17:04 mycat
-rw-r--r--. 1 root root 26030477 3月 3 08:54 Mycat-server-1.6.7.6-release-20210303094759-linux.tar.gz
-rwxrwxrwx. 2 root root 397618 5月 26 13:40 nmon_x86_64_centos7
drwxrwxr-x. 6 root root 4096 3月 2 14:11 redis-5.0.12
-rw-r--r--. 1 root root 1995069 3月 2 14:22 redis-5.0.12.tar.gz
drwxr-xr-x. 2 root root 6 10月 31 2018 rh
[root@mycat opt]# 文件复制
将解压后的目录copy到 /usr/local目录中
[root@mycat opt]# cp -r mycat/ /usr/local/
[root@mycat opt]# ls /usr/local/
bin etc games include lib lib64 libexec mycat sbin share src
[root@mycat opt]# 查看mycat目录及mycat的配置文件目录
[root@mycat opt]# cd /usr/local/mycat/
[root@mycat mycat]# ls
bin catlet conf lib logs version.txt
[root@mycat mycat]# cd conf/
[root@mycat conf]# ls
autopartition-long.txt rule.xml
auto-sharding-long.txt schema.xml
auto-sharding-rang-mod.txt schema.xml.bak
cacheservice.properties sequence_conf.properties
dbseq.sql sequence_db_conf.properties
dbseq - utf8mb4.sql sequence_distributed_conf.properties
dnindex.properties sequence_http_conf.properties
ehcache.xml sequence_time_conf.properties
index_to_charset.properties server.xml
log4j2.xml server.xml.bak
migrateTables.properties sharding-by-enum.txt
myid.properties wrapper.conf
partition-hash-int.txt zkconf
partition-range-mod.txt zkdownload
[root@mycat conf]# 
其中主要的几个配置文件如下：
- server.xml：是Mycat服务器参数调整和用户授权的配置文件。
- schema.xml：是逻辑库定义和表以及分片定义的配置文件。
- rule.xml： 是分片规则的配置文件，分片规则的具体一些参数信息单独存放为文件，也在这个目录下，配置文件修改需要重启MyCAT。
- log4j.xml： 日志存放在logs/log中，每天一个文件，日志的配置是在conf/log4j.xml中，根据自己的需要可以调整输出级别为debug
- debug级别下，会输出更多的信息，方便排查问题。
- autopartition-long.txt,partition-hash-int.txt,sequence_conf.properties， sequence_db_conf.properties 分片相关的id分片规则配置文件
- lib MyCAT自身的jar包或依赖的jar包的存放目录。
- logs MyCAT日志的存放目录。日志存放在logs/log中，每天一个文件
修改server.xml
修改schema.xml
修改dataNode、dataHost
select user()
启动
完整的启动过程如下
[root@mycat bin]# pwd
/usr/local/mycat/bin
[root@mycat bin]# ls
dataMigrate.sh init_zk_data.sh mycat rehash.sh startup_nowrap.sh wrapper-linux-ppc-64 wrapper-linux-x86-32 wrapper-linux-x86-64
[root@mycat bin]# ./mycat
Usage: ./mycat { console | start | stop | restart | status | dump }
[root@mycat bin]# ./mycat console
Running Mycat-server...
wrapper | --> Wrapper Started as Console
wrapper | Launching a JVM...
jvm 1 | Java HotSpot(TM) 64-Bit Server VM warning: ignoring option MaxPermSize=64M; support was removed in 8.0
jvm 1 | Wrapper (Version 3.2.3) http://wrapper.tanukisoftware.org
jvm 1 | Copyright 1999-2006 Tanuki Software, Inc. All Rights Reserved.
jvm 1 |
jvm 1 | 2021-06-14 21:44:34,395 [INFO ][WrapperSimpleAppMain] total resouces of dataHost host1 is :2 (io.mycat.backend.datasource.PhysicalDBPool:PhysicalDBPool.java:100)
jvm 1 | 2021-06-14 21:44:34,417 [INFO ][WrapperSimpleAppMain] create layer cache pool TableID2DataNodeCache of type encache ,default cache size 10000 ,default expire seconds18000 (io.mycat.cache.CacheService:CacheService.java:125)
jvm 1 | 2021-06-14 21:44:34,419 [INFO ][WrapperSimpleAppMain] create child Cache: TESTDB_ORDERS for layered cache TableID2DataNodeCache, size 50000, expire seconds 18000 (io.mycat.cache.DefaultLayedCachePool:DefaultLayedCachePool.java:80)
jvm 1 | 2021-06-14 21:44:40,604 [INFO ][WrapperSimpleAppMain] dyna class load from ./catlet,and auto check for class file modified every 60 seconds (io.mycat.config.classloader.DynaClassLoader:DynaClassLoader.java:34)
jvm 1 | 2021-06-14 21:44:40,605 [INFO ][WrapperSimpleAppMain] =============================================== (io.mycat.MycatServer:MycatServer.java:266)
jvm 1 | 2021-06-14 21:44:40,605 [INFO ][WrapperSimpleAppMain] MyCat is ready to startup ... (io.mycat.MycatServer:MycatServer.java:267)
jvm 1 | 2021-06-14 21:44:40,606 [INFO ][WrapperSimpleAppMain] Startup processors ...,total processors:4,aio thread pool size:8
jvm 1 | each process allocated socket buffer pool bytes ,a page size:2097152 a page's chunk number(PageSize/ChunkSize) is:512 buffer page's number is:80 (io.mycat.MycatServer:MycatServer.java:279)
jvm 1 | 2021-06-14 21:44:40,606 [INFO ][WrapperSimpleAppMain] sysconfig params:SystemConfig [processorBufferLocalPercent=100, frontSocketSoRcvbuf=1048576, frontSocketSoSndbuf=4194304, backSocketSoRcvbuf=4194304, backSocketSoSndbuf=1048576, frontSocketNoDelay=1, backSocketNoDelay=1, maxStringLiteralLength=65535, frontWriteQueueSize=2048, bindIp=0.0.0.0, serverPort=8066, managerPort=9066, charset=utf8, processors=4, processorExecutor=8, timerExecutor=2, managerExecutor=2, idleTimeout=1800000, catletClassCheckSeconds=60, sqlExecuteTimeout=300, processorCheckPeriod=1000, dataNodeIdleCheckPeriod=300000, dataNodeHeartbeatPeriod=10000, clusterHeartbeatUser=_HEARTBEAT_USER_, clusterHeartbeatPass=_HEARTBEAT_PASS_, clusterHeartbeatPeriod=5000, clusterHeartbeatTimeout=10000, clusterHeartbeatRetry=10, txIsolation=3, parserCommentVersion=50148, sqlRecordCount=10, bufferPoolPageSize=2097152, bufferPoolChunkSize=4096, bufferPoolPageNumber=80, maxResultSet=524288, bigResultSizeSqlCount=10, bufferUsagePercent=80, flowControlRejectStrategy=0, clearBigSqLResultSetMapMs=600000, defaultMaxLimit=100, sequnceHandlerType=2, sqlInterceptor=io.mycat.server.interceptor.impl.DefaultSqlInterceptor, sqlInterceptorType=select, sqlInterceptorFile=/usr/local/mycat/logs/sql.txt, mutiNodeLimitType=0, mutiNodePatchSize=100, defaultSqlParser=druidparser, usingAIO=0, packetHeaderSize=4, maxPacketSize=16777216, mycatNodeId=1] (io.mycat.MycatServer:MycatServer.java:280)
jvm 1 | log4j:WARN No appenders could be found for logger (io.mycat.memory.MyCatMemory).
jvm 1 | log4j:WARN Please initialize the log4j system properly.
jvm 1 | log4j:WARN See http://logging.apache.org/log4j/1.2/faq.html#noconfig for more info.
jvm 1 | 2021-06-14 21:44:41,495 [INFO ][WrapperSimpleAppMain] using nio network handler (io.mycat.MycatServer:MycatServer.java:381)
jvm 1 | 2021-06-14 21:44:41,541 [INFO ][WrapperSimpleAppMain] $_MyCatManager is started and listening on 9066 (io.mycat.MycatServer:MycatServer.java:397)
jvm 1 | 2021-06-14 21:44:41,543 [INFO ][WrapperSimpleAppMain] $_MyCatServer is started and listening on 8066 (io.mycat.MycatServer:MycatServer.java:401)
jvm 1 | 2021-06-14 21:44:41,544 [INFO ][WrapperSimpleAppMain] =============================================== (io.mycat.MycatServer:MycatServer.java:403)
jvm 1 | 2021-06-14 21:44:41,544 [INFO ][WrapperSimpleAppMain] Initialize dataHost ... (io.mycat.MycatServer:MycatServer.java:407)
jvm 1 | 2021-06-14 21:44:41,544 [INFO ][WrapperSimpleAppMain] init backend myqsl source ,create connections total 10 for hostM1 index :0 (io.mycat.backend.datasource.PhysicalDBPool:PhysicalDBPool.java:294)
jvm 1 | 2021-06-14 21:44:41,551 [INFO ][WrapperSimpleAppMain] no ilde connection in pool,create new connection for hostM1 of schema testdb (io.mycat.backend.datasource.PhysicalDatasource:PhysicalDatasource.java:413)
jvm 1 | 2021-06-14 21:44:41,555 [INFO ][WrapperSimpleAppMain] no ilde connection in pool,create new connection for hostM1 of schema testdb (io.mycat.backend.datasource.PhysicalDatasource:PhysicalDatasource.java:413)
jvm 1 | 2021-06-14 21:44:41,560 [INFO ][WrapperSimpleAppMain] no ilde connection in pool,create new connection for hostM1 of schema testdb (io.mycat.backend.datasource.PhysicalDatasource:PhysicalDatasource.java:413)
jvm 1 | 2021-06-14 21:44:41,564 [INFO ][WrapperSimpleAppMain] no ilde connection in pool,create new connection for hostM1 of schema testdb (io.mycat.backend.datasource.PhysicalDatasource:PhysicalDatasource.java:413)
jvm 1 | 2021-06-14 21:44:41,633 [INFO ][WrapperSimpleAppMain] no ilde connection in pool,create new connection for hostM1 of schema testdb (io.mycat.backend.datasource.PhysicalDatasource:PhysicalDatasource.java:413)
jvm 1 | 2021-06-14 21:44:41,650 [INFO ][WrapperSimpleAppMain] no ilde connection in pool,create new connection for hostM1 of schema testdb (io.mycat.backend.datasource.PhysicalDatasource:PhysicalDatasource.java:413)
jvm 1 | 2021-06-14 21:44:41,653 [INFO ][WrapperSimpleAppMain] no ilde connection in pool,create new connection for hostM1 of schema testdb (io.mycat.backend.datasource.PhysicalDatasource:PhysicalDatasource.java:413)
jvm 1 | 2021-06-14 21:44:41,677 [INFO ][WrapperSimpleAppMain] no ilde connection in pool,create new connection for hostM1 of schema testdb (io.mycat.backend.datasource.PhysicalDatasource:PhysicalDatasource.java:413)
jvm 1 | 2021-06-14 21:44:41,680 [INFO ][WrapperSimpleAppMain] no ilde connection in pool,create new connection for hostM1 of schema testdb (io.mycat.backend.datasource.PhysicalDatasource:PhysicalDatasource.java:413)
jvm 1 | 2021-06-14 21:44:41,681 [INFO ][WrapperSimpleAppMain] no ilde connection in pool,create new connection for hostM1 of schema testdb (io.mycat.backend.datasource.PhysicalDatasource:PhysicalDatasource.java:413)
jvm 1 | 2021-06-14 21:44:41,905 [INFO ][$_NIOREACTOR-3-RW] connected successfuly MySQLConnection [id=3, lastTime=1623678281905, user=root, schema=testdb, old shema=testdb, borrowed=true, fromSlaveDB=false, threadId=12, charset=latin1, txIsolation=3, autocommit=true, attachment=null, respHandler=null, host=172.17.0.2, port=3306, statusSync=null, writeQueue=0, modifiedSQLExecuted=false] (io.mycat.backend.mysql.nio.handler.GetConnectionHandler:GetConnectionHandler.java:67)
jvm 1 | 2021-06-14 21:44:41,905 [INFO ][$_NIOREACTOR-1-RW] connected successfuly MySQLConnection [id=1, lastTime=1623678281904, user=root, schema=testdb, old shema=testdb, borrowed=true, fromSlaveDB=false, threadId=21, charset=latin1, txIsolation=3, autocommit=true, attachment=null, respHandler=null, host=172.17.0.2, port=3306, statusSync=null, writeQueue=0, modifiedSQLExecuted=false] (io.mycat.backend.mysql.nio.handler.GetConnectionHandler:GetConnectionHandler.java:67)
jvm 1 | 2021-06-14 21:44:41,905 [INFO ][$_NIOREACTOR-2-RW] connected successfuly MySQLConnection [id=6, lastTime=1623678281905, user=root, schema=testdb, old shema=testdb, borrowed=true, fromSlaveDB=false, threadId=20, charset=latin1, txIsolation=3, autocommit=true, attachment=null, respHandler=null, host=172.17.0.2, port=3306, statusSync=null, writeQueue=0, modifiedSQLExecuted=false] (io.mycat.backend.mysql.nio.handler.GetConnectionHandler:GetConnectionHandler.java:67)
jvm 1 | 2021-06-14 21:44:41,906 [INFO ][$_NIOREACTOR-3-RW] connected successfuly MySQLConnection [id=7, lastTime=1623678281905, user=root, schema=testdb, old shema=testdb, borrowed=true, fromSlaveDB=false, threadId=17, charset=latin1, txIsolation=3, autocommit=true, attachment=null, respHandler=null, host=172.17.0.2, port=3306, statusSync=null, writeQueue=0, modifiedSQLExecuted=false] (io.mycat.backend.mysql.nio.handler.GetConnectionHandler:GetConnectionHandler.java:67)
jvm 1 | 2021-06-14 21:44:41,906 [INFO ][$_NIOREACTOR-0-RW] connected successfuly MySQLConnection [id=4, lastTime=1623678281905, user=root, schema=testdb, old shema=testdb, borrowed=true, fromSlaveDB=false, threadId=15, charset=latin1, txIsolation=3, autocommit=true, attachment=null, respHandler=null, host=172.17.0.2, port=3306, statusSync=null, writeQueue=0, modifiedSQLExecuted=false] (io.mycat.backend.mysql.nio.handler.GetConnectionHandler:GetConnectionHandler.java:67)
jvm 1 | 2021-06-14 21:44:41,906 [INFO ][$_NIOREACTOR-2-RW] connected successfuly MySQLConnection [id=2, lastTime=1623678281906, user=root, schema=testdb, old shema=testdb, borrowed=true, fromSlaveDB=false, threadId=14, charset=latin1, txIsolation=3, autocommit=true, attachment=null, respHandler=null, host=172.17.0.2, port=3306, statusSync=null, writeQueue=0, modifiedSQLExecuted=false] (io.mycat.backend.mysql.nio.handler.GetConnectionHandler:GetConnectionHandler.java:67)
jvm 1 | 2021-06-14 21:44:41,906 [INFO ][$_NIOREACTOR-1-RW] connected successfuly MySQLConnection [id=9, lastTime=1623678281906, user=root, schema=testdb, old shema=testdb, borrowed=true, fromSlaveDB=false, threadId=13, charset=latin1, txIsolation=3, autocommit=true, attachment=null, respHandler=null, host=172.17.0.2, port=3306, statusSync=null, writeQueue=0, modifiedSQLExecuted=false] (io.mycat.backend.mysql.nio.handler.GetConnectionHandler:GetConnectionHandler.java:67)
jvm 1 | 2021-06-14 21:44:41,906 [INFO ][$_NIOREACTOR-1-RW] connected successfuly MySQLConnection [id=5, lastTime=1623678281906, user=root, schema=testdb, old shema=testdb, borrowed=true, fromSlaveDB=false, threadId=19, charset=latin1, txIsolation=3, autocommit=true, attachment=null, respHandler=null, host=172.17.0.2, port=3306, statusSync=null, writeQueue=0, modifiedSQLExecuted=false] (io.mycat.backend.mysql.nio.handler.GetConnectionHandler:GetConnectionHandler.java:67)
jvm 1 | 2021-06-14 21:44:41,907 [INFO ][$_NIOREACTOR-0-RW] connected successfuly MySQLConnection [id=8, lastTime=1623678281907, user=root, schema=testdb, old shema=testdb, borrowed=true, fromSlaveDB=false, threadId=18, charset=latin1, txIsolation=3, autocommit=true, attachment=null, respHandler=null, host=172.17.0.2, port=3306, statusSync=null, writeQueue=0, modifiedSQLExecuted=false] (io.mycat.backend.mysql.nio.handler.GetConnectionHandler:GetConnectionHandler.java:67)
jvm 1 | 2021-06-14 21:44:41,909 [INFO ][$_NIOREACTOR-2-RW] connected successfuly MySQLConnection [id=10, lastTime=1623678281909, user=root, schema=testdb, old shema=testdb, borrowed=true, fromSlaveDB=false, threadId=16, charset=latin1, txIsolation=3, autocommit=true, attachment=null, respHandler=null, host=172.17.0.2, port=3306, statusSync=null, writeQueue=0, modifiedSQLExecuted=false] (io.mycat.backend.mysql.nio.handler.GetConnectionHandler:GetConnectionHandler.java:67)
jvm 1 | 2021-06-14 21:44:41,985 [INFO ][WrapperSimpleAppMain] init result :finished 10 success 10 target count:10 (io.mycat.backend.datasource.PhysicalDBPool:PhysicalDBPool.java:319)
jvm 1 | 2021-06-14 21:44:41,986 [INFO ][WrapperSimpleAppMain] host1 index:0 init success (io.mycat.backend.datasource.PhysicalDBPool:PhysicalDBPool.java:265)
jvm 1 | 2021-06-14 21:44:41,986 [INFO ][WrapperSimpleAppMain] save DataHost index host1 cur index 0 (io.mycat.MycatServer:MycatServer.java:604)
jvm 1 | 2021-06-14 21:44:42,056 [INFO ][Timer0] create connections ,because idle connection not enough ,cur is 0, minCon is 10 for hostS1 (io.mycat.backend.datasource.PhysicalDatasource:PhysicalDatasource.java:299)
jvm 1 | 2021-06-14 21:44:42,127 [INFO ][$_NIOREACTOR-3-RW] connectionAcquired MySQLConnection [id=11, lastTime=1623678282126, user=root, schema=testdb, old shema=testdb, borrowed=false, fromSlaveDB=true, threadId=15, charset=latin1, txIsolation=3, autocommit=true, attachment=null, respHandler=null, host=172.17.0.3, port=3306, statusSync=null, writeQueue=0, modifiedSQLExecuted=false] (io.mycat.backend.mysql.nio.handler.NewConnectionRespHandler:NewConnectionRespHandler.java:45)
jvm 1 | 2021-06-14 21:44:42,149 [INFO ][$_NIOREACTOR-0-RW] connectionAcquired MySQLConnection [id=12, lastTime=1623678282149, user=root, schema=testdb, old shema=testdb, borrowed=false, fromSlaveDB=true, threadId=16, charset=latin1, txIsolation=3, autocommit=true, attachment=null, respHandler=null, host=172.17.0.3, port=3306, statusSync=null, writeQueue=0, modifiedSQLExecuted=false] (io.mycat.backend.mysql.nio.handler.NewConnectionRespHandler:NewConnectionRespHandler.java:45)
jvm 1 | 2021-06-14 21:44:42,149 [INFO ][$_NIOREACTOR-1-RW] connectionAcquired MySQLConnection [id=13, lastTime=1623678282149, user=root, schema=testdb, old shema=testdb, borrowed=false, fromSlaveDB=true, threadId=17, charset=latin1, txIsolation=3, autocommit=true, attachment=null, respHandler=null, host=172.17.0.3, port=3306, statusSync=null, writeQueue=0, modifiedSQLExecuted=false] (io.mycat.backend.mysql.nio.handler.NewConnectionRespHandler:NewConnectionRespHandler.java:45)
jvm 1 | MyCAT Server startup successfully. see logs in logs/mycat.log
jvm 1 | 2021-06-14 21:49:42,022 [INFO ][Timer1] create connections ,because idle connection not enough ,cur is 3, minCon is 10 for hostS1 (io.mycat.backend.datasource.PhysicalDatasource:PhysicalDatasource.java:299)
jvm 1 | 2021-06-14 21:49:42,040 [INFO ][$_NIOREACTOR-3-RW] connectionAcquired MySQLConnection [id=15, lastTime=1623678582039, user=root, schema=testdb, old shema=testdb, borrowed=false, fromSlaveDB=true, threadId=18, charset=latin1, txIsolation=3, autocommit=true, attachment=null, respHandler=null, host=172.17.0.3, port=3306, statusSync=null, writeQueue=0, modifiedSQLExecuted=false] (io.mycat.backend.mysql.nio.handler.NewConnectionRespHandler:NewConnectionRespHandler.java:45)
jvm 1 | 2021-06-14 21:49:42,040 [INFO ][$_NIOREACTOR-2-RW] connectionAcquired MySQLConnection [id=14, lastTime=1623678582039, user=root, schema=testdb, old shema=testdb, borrowed=false, fromSlaveDB=true, threadId=19, charset=latin1, txIsolation=3, autocommit=true, attachment=null, respHandler=null, host=172.17.0.3, port=3306, statusSync=null, writeQueue=0, modifiedSQLExecuted=false] (io.mycat.backend.mysql.nio.handler.NewConnectionRespHandler:NewConnectionRespHandler.java:45)
jvm 1 | 2021-06-14 21:49:52,518 [INFO ][$_NIOREACTOR-0-RW] [thread=$_NIOREACTOR-0-RW,class=ManagerConnection,id=1,host=127.0.0.1,port=9066,schema=null]'mycat' login success (io.mycat.net.handler.FrontendAuthenticator:FrontendAuthenticator.java:194)
jvm 1 | 2021-06-14 21:52:56,495 [INFO ][$_NIOREACTOR-0-RW] close connection,reason:quit cmd ,[thread=$_NIOREACTOR-0-RW,class=ManagerConnection,id=1,host=127.0.0.1,port=9066,schema=null] (io.mycat.net.AbstractConnection:AbstractConnection.java:508)
jvm 1 | 2021-06-14 21:54:42,022 [INFO ][Timer1] create connections ,because idle connection not enough ,cur is 5, minCon is 10 for hostS1 (io.mycat.backend.datasource.PhysicalDatasource:PhysicalDatasource.java:299)
jvm 1 | 2021-06-14 21:54:42,049 [INFO ][$_NIOREACTOR-1-RW] connectionAcquired MySQLConnection [id=16, lastTime=1623678882039, user=root, schema=testdb, old shema=testdb, borrowed=false, fromSlaveDB=true, threadId=20, charset=latin1, txIsolation=3, autocommit=true, attachment=null, respHandler=null, host=172.17.0.3, port=3306, statusSync=null, writeQueue=0, modifiedSQLExecuted=false] (io.mycat.backend.mysql.nio.handler.NewConnectionRespHandler:NewConnectionRespHandler.java:45)
Mycat登录
使用9066端口登录后台管理窗口，此登录方式用于管理维护Mycat（管理员本机机器）
[root@mycat opt]# mysql -umycat -p123456 -h 127.0.0.1 -P 9066
Welcome to the MariaDB monitor. Commands end with ; or \g.
Your MySQL connection id is 2
Server version: 5.6.29-mycat-1.6-RELEASE-20161028204710 MyCat Server (monitor)
Copyright (c) 2000, 2018, Oracle, MariaDB Corporation Ab and others.
Type 'help;' or '\h' for help. Type '\c' to clear the current input statement.
MySQL [(none)]> 主从读写分离
分别向主数据库 和从数据库 插入不一样的数据
在mycat客户端查询数据，发现都是写数据库的内容
修改Mycat的配置文件schema.xml的
- 当balance=0 时，不开启读写分离，所有读操作都发生在当前的writeHost上
- 当balance=1 ，所有读操作都随机发送到当前的writeHost对应的readHost和备用的writeHos都参与select语句的负载均衡，简单的说当双主双从模式（M1->S1 ,M2-S2 M2和M2互为主备）
- 当balance=2，所有的读操作都随机发送到所有的writeHost,readHost上
- 当balance=3 ，所有的读操作都只发送到writeHost(db1)的readHost(db2)上
生产当中应该使用 1或者3，此处为了演示设置balance="2"
select user()
双主双从读写分离请看下节！！！！！
双主双从读写分离请看下节！！！！！
双主双从读写分离请看下节！！！！！
双主双从读写分离请看下节！！！！！
双主双从读写分离请看下节！！！！！