mycat1.6.5 入門搭建

阿新 • • 發佈：2018-11-02

作為分散式資料庫中間外掛，mycat入門配置很簡單(我感覺是這樣，除了遇到了坑~~)先放幾個學習的時候看到的部落格，先留著。

官網:http://www.mycat.io/

mycat下載地址:http://dl.mycat.io/

mycat簡介：https://blog.csdn.net/wrs120/article/details/80417345

mycat schema.xml詳解：https://blog.csdn.net/linlinv3/article/details/51777324

mycat最主要配置檔案有三個，server.xml、schema.xml、與rule.xml。其中server.xml：是Mycat伺服器引數調整和使用者授權的配置檔案。schema.xml：是邏輯庫定義和表以及分片定義的配置檔案。rule.xml：是分片規則的配置檔案，分片規則的具體一些引數資訊單獨存放為檔案。

server.xml配置，需要修改的有:登陸的賬戶密碼、邏輯資料庫。此處設定的登陸賬戶名密碼是root / xichuan123456，邏輯資料庫是db_xichuan。mycat預設的服務埠是8066，預設的管理埠是9066。

<?xml version="1.0" encoding="UTF-8"?>
<!-- - - Licensed under the Apache License, Version 2.0 (the "License"); 
	- you may not use this file except in compliance with the License. - You 
	may obtain a copy of the License at - - http://www.apache.org/licenses/LICENSE-2.0 
	- - Unless required by applicable law or agreed to in writing, software - 
	distributed under the License is distributed on an "AS IS" BASIS, - WITHOUT 
	WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. - See the 
	License for the specific language governing permissions and - limitations 
	under the License. -->
<!DOCTYPE mycat:server SYSTEM "server.dtd">
<mycat:server xmlns:mycat="http://io.mycat/">
	<system>
	<property name="nonePasswordLogin">0</property> <!-- 0為需要密碼登陸、1為不需要密碼登陸 ,預設為0，設定為1則需要指定預設賬戶-->
	<property name="useHandshakeV10">1</property>
	<property name="useSqlStat">1</property>  <!-- 1為開啟實時統計、0為關閉 -->
	<property name="useGlobleTableCheck">1</property>  <!-- 1為開啟全加班一致性檢測、0為關閉 -->

		<property name="sequnceHandlerType">2</property>
	<property name="subqueryRelationshipCheck">false</property> <!-- 子查詢中存在關聯查詢的情況下,檢查關聯欄位中是否有分片欄位 .預設 false -->
		<property name="processorBufferPoolType">0</property>
		<!--預設是65535 64K 用於sql解析時最大文字長度 -->
		<!--<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> -->
		<!--分散式事務開關，0為不過濾分散式事務，1為過濾分散式事務（如果分散式事務內只涉及全域性表，則不過濾），2為不過濾分散式事務,但是記錄分散式事務日誌-->
		<property name="handleDistributedTransactions">0</property>
		
			<!--
			off heap for merge/order/group/limit      1開啟   0關閉
		-->
		<property name="useOffHeapForMerge">1</property>

		<!--
			單位為m
		-->
        <property name="memoryPageSize">64k</property>

		<!--
			單位為k
		-->
		<property name="spillsFileBufferSize">1k</property>

		<property name="useStreamOutput">0</property>

		<!--
			單位為m
		-->
		<property name="systemReserveMemorySize">384m</property>


		<!--是否採用zookeeper協調切換  -->
		<property name="useZKSwitch">false</property>

		<!-- XA Recovery Log日誌路徑 -->
		<!--<property name="XARecoveryLogBaseDir">./</property>-->

		<!-- XA Recovery Log日誌名稱 -->
		<!--<property name="XARecoveryLogBaseName">tmlog</property>-->

	</system>
	
	<!-- 全域性SQL防火牆設定 -->
	<!--白名單可以使用萬用字元%或著*-->
	<!--例如<host host="127.0.0.*" user="root"/>-->
	<!--例如<host host="127.0.*" user="root"/>-->
	<!--例如<host host="127.*" user="root"/>-->
	<!--例如<host host="1*7.*" user="root"/>-->
	<!--這些配置情況下對於127.0.0.1都能以root賬戶登入-->
	<!--
	<firewall>
		<whitehost>
			<host host="1*7.0.0.*" user="root"/>
		</whitehost>
		<blacklist check="false">
		</blacklist>
	</firewall>
	-->

	<user name="root" defaultAccount="true">
		<property name="password">xichuan123456</property>
		<property name="schemas">db_xichuan</property>
		
		<!-- 表級 DML 許可權設定 -->
		<!-- 		
		<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">db_xichuan</property>
		<property name="readOnly">true</property>
	</user>

</mycat:server>

配置schema.xml。其中邏輯資料庫db_xichuan中配置兩張表：user、info。其中與三個節點，dn1、dn2、dn3，他們使用的連線源都是localhost1，對應的資料庫分別是：mycat1、mycat2、mycat3。且邏輯表user對應的是mycat1資料庫中的user表，邏輯表info對應的是mycat2、mycat3資料庫中的info表。rule="mod-long"代表切分規則。

checkSQLschema="true"，不然會遇到錯誤，解決問題部落格：https://blog.csdn.net/zc_ad/article/details/83540995

<?xml version="1.0"?>
<!DOCTYPE mycat:schema SYSTEM "schema.dtd">
<mycat:schema xmlns:mycat="http://io.mycat/">
		
	<!--注意 checkSQLschema="true"，不然會報錯-->
	<schema name="db_xichuan" checkSQLschema="true" sqlMaxLimit="100" >
		<table name="user" primaryKey="id" dataNode="dn1" type="global" />
		<table name="info" primaryKey="id" dataNode="dn2,dn3" rule="mod-long" />
	</schema>

	<dataNode name="dn1" dataHost="localhost1" database="mycat1" />
	<dataNode name="dn2" dataHost="localhost1" database="mycat2" />
	<dataNode name="dn3" dataHost="localhost1" database="mycat3" />
        <!--真正資料庫連線地址-->
	<dataHost name="localhost1" maxCon="1000" minCon="10" balance="0"
			  writeType="0" dbType="mysql" dbDriver="native" switchType="1"  slaveThreshold="100">
		<heartbeat>select user()</heartbeat>
		<writeHost host="hostS1" url="12.12.12.12:3306" user="root"
				   password="xichuan123456" />
	</dataHost>
	
</mycat:schema>

他們的對應關係如下簡圖：

rule.xml配置

<?xml version="1.0" encoding="UTF-8"?>
<!-- - - Licensed under the Apache License, Version 2.0 (the "License"); 
	- you may not use this file except in compliance with the License. - You 
	may obtain a copy of the License at - - http://www.apache.org/licenses/LICENSE-2.0 
	- - Unless required by applicable law or agreed to in writing, software - 
	distributed under the License is distributed on an "AS IS" BASIS, - WITHOUT 
	WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. - See the 
	License for the specific language governing permissions and - limitations 
	under the License. -->
<!DOCTYPE mycat:rule SYSTEM "rule.dtd">
<mycat:rule xmlns:mycat="http://io.mycat/">
	<tableRule name="rule1">
		<rule>
			<columns>id</columns>
			<algorithm>func1</algorithm>
		</rule>
	</tableRule>

	<tableRule name="rule2">
		<rule>
			<columns>user_id</columns>
			<algorithm>func1</algorithm>
		</rule>
	</tableRule>

	<tableRule name="sharding-by-intfile">
		<rule>
			<columns>sharding_id</columns>
			<algorithm>hash-int</algorithm>
		</rule>
	</tableRule>
	<tableRule name="auto-sharding-long">
		<rule>
			<columns>id</columns>
			<algorithm>rang-long</algorithm>
		</rule>
	</tableRule>
	<tableRule name="mod-long">
		<rule>
			<columns>id</columns>
			<algorithm>mod-long</algorithm>
		</rule>
	</tableRule>
	<tableRule name="sharding-by-murmur">
		<rule>
			<columns>id</columns>
			<algorithm>murmur</algorithm>
		</rule>
	</tableRule>
	<tableRule name="crc32slot">
		<rule>
			<columns>id</columns>
			<algorithm>crc32slot</algorithm>
		</rule>
	</tableRule>
	<tableRule name="sharding-by-month">
		<rule>
			<columns>create_time</columns>
			<algorithm>partbymonth</algorithm>
		</rule>
	</tableRule>
	<tableRule name="latest-month-calldate">
		<rule>
			<columns>calldate</columns>
			<algorithm>latestMonth</algorithm>
		</rule>
	</tableRule>
	
	<tableRule name="auto-sharding-rang-mod">
		<rule>
			<columns>id</columns>
			<algorithm>rang-mod</algorithm>
		</rule>
	</tableRule>
	
	<tableRule name="jch">
		<rule>
			<columns>id</columns>
			<algorithm>jump-consistent-hash</algorithm>
		</rule>
	</tableRule>

	<function name="murmur"
		class="io.mycat.route.function.PartitionByMurmurHash">
		<property name="seed">0</property><!-- 預設是0 -->
		<property name="count">2</property><!-- 要分片的資料庫節點數量，必須指定，否則沒法分片 -->
		<property name="virtualBucketTimes">160</property><!-- 一個實際的資料庫節點被對映為這麼多虛擬節點，預設是160倍，也就是虛擬節點數是物理節點數的160倍 -->
		<!-- <property name="weightMapFile">weightMapFile</property> 節點的權重，沒有指定權重的節點預設是1。以properties檔案的格式填寫，以從0開始到count-1的整數值也就是節點索引為key，以節點權重值為值。所有權重值必須是正整數，否則以1代替 -->
		<!-- <property name="bucketMapPath">/etc/mycat/bucketMapPath</property> 
			用於測試時觀察各物理節點與虛擬節點的分佈情況，如果指定了這個屬性，會把虛擬節點的murmur hash值與物理節點的對映按行輸出到這個檔案，沒有預設值，如果不指定，就不會輸出任何東西 -->
	</function>

	<function name="crc32slot"
			  class="io.mycat.route.function.PartitionByCRC32PreSlot">
		<property name="count">2</property><!-- 要分片的資料庫節點數量，必須指定，否則沒法分片 -->
	</function>
	<function name="hash-int"
		class="io.mycat.route.function.PartitionByFileMap">
		<property name="mapFile">partition-hash-int.txt</property>
	</function>
	<function name="rang-long"
		class="io.mycat.route.function.AutoPartitionByLong">
		<property name="mapFile">autopartition-long.txt</property>
	</function>
	<function name="mod-long" class="io.mycat.route.function.PartitionByMod">
		<!-- how many data nodes -->
		<property name="count">2</property>
	</function>

	<function name="func1" class="io.mycat.route.function.PartitionByLong">
		<property name="partitionCount">8</property>
		<property name="partitionLength">128</property>
	</function>
	<function name="latestMonth"
		class="io.mycat.route.function.LatestMonthPartion">
		<property name="splitOneDay">24</property>
	</function>
	<function name="partbymonth"
		class="io.mycat.route.function.PartitionByMonth">
		<property name="dateFormat">yyyy-MM-dd</property>
		<property name="sBeginDate">2015-01-01</property>
	</function>
	
	<function name="rang-mod" class="io.mycat.route.function.PartitionByRangeMod">
        	<property name="mapFile">partition-range-mod.txt</property>
	</function>
	
	<function name="jump-consistent-hash" class="io.mycat.route.function.PartitionByJumpConsistentHash">
		<property name="totalBuckets">3</property>
	</function>
</mycat:rule>

在官網上下載mycat

1.使用命令進行解壓：tar xzvf Mycat-server-1.6.5-release-20180122220033-linux.tar.gz，然後進入conf目錄下，將上面三個檔案覆蓋，然後啟動mycat。

2.進入mycat/bin目錄，

啟動命令：./mycat start

停止命令：./mycat stop

重啟命令：./mycat restart

檢視狀態命令：./mycat status。

3.進入mycat/log目錄，檢視日誌:tail -f mycat.log。檢視是否報錯。

4.使用Navicat進行連線

附件：資料庫以及表的建立

create DATABASE mycat1;
use mycat1;

CREATE TABLE `user`  (
  `id` bigint(20) NOT NULL AUTO_INCREMENT,
  `name` varchar(50) CHARACTER SET utf8 COLLATE utf8_general_ci NULL DEFAULT NULL,
  PRIMARY KEY (`id`) USING BTREE
);
INSERT INTO `user` VALUES (1, 'mycat1_user_1');
INSERT INTO `user` VALUES (2, 'mycat1_user_2');





create DATABASE mycat2;
use mycat2;

CREATE TABLE `info`  (
  `id` bigint(20) NOT NULL AUTO_INCREMENT,
  `name` varchar(50) CHARACTER SET utf8 COLLATE utf8_general_ci NULL DEFAULT NULL,
  PRIMARY KEY (`id`) USING BTREE
) ;
INSERT INTO `info` VALUES (14, 'mycat2_info_1');
INSERT INTO `info` VALUES (15, 'mycat2_info_2');






create DATABASE mycat3;
use mycat3;

CREATE TABLE `info`  (
  `id` bigint(20) NOT NULL AUTO_INCREMENT,
  `name` varchar(50) CHARACTER SET utf8 COLLATE utf8_general_ci NULL DEFAULT NULL,
  PRIMARY KEY (`id`) USING BTREE
) ;
INSERT INTO `info` VALUES (14, 'mycat3_info_1');
INSERT INTO `info` VALUES (15, 'mycat3_info_2');

搭建成功後的效果如下:

mycat1.6.5 入門搭建

mycat1.6.5 入門搭建

Appium1.6.5環境搭建

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mycat1.6.5分片（字串拆分hash）

mycat1.6.5分片（一致性hash）

mycat1.6.5分片（取模）

mycat1.6.5分片(按小時)

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