MyCat\u6838\u5fc3\u6982\u5ff5<\/h3>\n
<\/p>\n
- \n
Schema<\/code>\uff1a\u7531\u5b83\u6307\u5b9a\u903b\u8f91\u6570\u636e\u5e93\uff08\u76f8\u5f53\u4e8eMySQL\u7684database\u6570\u636e\u5e93\uff09<\/li>\nTable<\/code>\uff1a\u903b\u8f91\u8868\uff08\u76f8\u5f53\u4e8eMySQL\u7684table\u8868\uff09<\/li>\nDataNode<\/code>\uff1a\u771f\u6b63\u5b58\u50a8\u6570\u636e\u7684\u7269\u7406\u8282\u70b9<\/li>\nDataHost<\/code>\uff1a\u5b58\u50a8\u8282\u70b9\u6240\u5728\u7684\u6570\u636e\u5e93\u4e3b\u673a\uff08\u6307\u5b9aMySQL\u6570\u636e\u5e93\u7684\u8fde\u63a5\u4fe1\u606f\uff09<\/li>\nUser<\/code>\uff1aMyCat\u7684\u7528\u6237\uff08\u7c7b\u4f3c\u4e8eMySQL\u7684\u7528\u6237\uff0c\u652f\u6301\u591a\u7528\u6237\uff09<\/li>\n<\/ul>\nMyCat\u4e3b\u8981\u89e3\u51b3\u95ee\u9898<\/h3>\n
- \n
- \u6d77\u91cf\u6570\u636e\u4fdd\u5b58<\/li>\n
- \u67e5\u8be2\u4f18\u5316<\/li>\n<\/ul>\n
MyCat\u5bf9\u591a\u6570\u636e\u5e93\u7684\u652f\u6301<\/h3>\n
- \n
- MySQL<\/li>\n
- Oracle<\/li>\n
- PostgreSQL<\/li>\n
- SQL Server<\/li>\n
- MongoDB<\/li>\n<\/ul>\n
MyCat\u5206\u7247\u7b56\u7565<\/h3>\n
MyCAT\u652f\u6301\u6c34\u5e73\u5206\u7247\u4e0e\u5782\u76f4\u5206\u7247\uff1a<\/p>\n
- \n
- \u6c34\u5e73\u5206\u7247\uff1a\u4e00\u4e2a\u8868\u683c\u7684\u6570\u636e\u5206\u5272\u5230\u591a\u4e2a\u8282\u70b9\u4e0a\uff0c\u6309\u7167\u884c\u5206\u9694<\/li>\n
- \u5782\u76f4\u5206\u7247\uff1a\u4e00\u4e2a\u6570\u636e\u5e93\u4e2d\u591a\u4e2a\u8868\u683cA\uff0cB\uff0cC\uff0cA\u5b58\u50a8\u5230\u8282\u70b91\u4e0a\uff0cB\u5b58\u50a8\u5230\u8282\u70b92\u4e0a\uff0cC\u5b58\u50a8\u5230\u8282\u70b93 \u4e0a<\/li>\n<\/ul>\n
![\"MyCat\u5206\u7247\u7b56\u7565\"](\"http:\/\/www.yezhou.me\/AppBlog\/images\/Java\/MyCat\u5206\u7247\u7b56\u7565.png\")
<\/p>\nMyCAT\u901a\u8fc7\u5b9a\u4e49\u8868\u7684\u5206\u7247\u89c4\u5219\u6765\u5b9e\u73b0\u5206\u7247\uff0c\u6bcf\u4e2a\u8868\u683c\u53ef\u4ee5\u6346\u7ed1\u4e00\u4e2a\u5206\u7247\u89c4\u5219\uff0c\u6bcf\u4e2a\u5206\u7247\u89c4\u5219\u6307\u5b9a\u4e00\u4e2a\u5206\u7247\u5b57\u6bb5\u5e76\u7ed1\u5b9a\u4e00\u4e2a\u51fd\u6570\uff0c\u6765\u5b9e\u73b0\u52a8\u6001\u5206\u7247\u7b97\u6cd5\u3002<\/p>\n
- \n
Schema<\/code>\uff1a\u903b\u8f91\u5e93\uff0c\u4e0eMySQL\u4e2d\u7684Database\uff08\u6570\u636e\u5e93\uff09\u5bf9\u5e94\uff0c\u4e00\u4e2a\u903b\u8f91\u5e93\u4e2d\u5b9a\u4e49\u4e86\u6240\u5305\u62ec\u7684Table<\/li>\nTable<\/code>\uff1a\u8868\uff0c\u5373\u7269\u7406\u6570\u636e\u5e93\u4e2d\u5b58\u50a8\u7684\u67d0\u4e00\u5f20\u8868\uff0c\u4e0e\u4f20\u7edf\u6570\u636e\u5e93\u4e0d\u540c\uff0c\u8fd9\u91cc\u7684\u8868\u683c\u9700\u8981\u58f0\u660e\u5176\u6240\u5b58\u50a8\u7684\u903b\u8f91\u6570\u636e\u8282\u70b9DataNode\u3002\u5728\u6b64\u53ef\u4ee5\u6307\u5b9a\u8868\u7684\u5206\u7247\u89c4\u5219<\/li>\nDataNode<\/code>\uff1aMyCAT\u7684\u903b\u8f91\u6570\u636e\u8282\u70b9\uff0c\u662f\u5b58\u653etable\u7684\u5177\u4f53\u7269\u7406\u8282\u70b9\uff0c\u4e5f\u79f0\u4e4b\u4e3a\u5206\u7247\u8282\u70b9\uff0c\u901a\u8fc7 DataHost\u6765\u5173\u8054\u5230\u540e\u7aef\u67d0\u4e2a\u5177\u4f53\u6570\u636e\u5e93\u4e0a<\/li>\nDataHost<\/code>\uff1a\u5b9a\u4e49\u67d0\u4e2a\u7269\u7406\u5e93\u7684\u8bbf\u95ee\u5730\u5740\uff0c\u7528\u4e8e\u6346\u7ed1\u5230Datanode\u4e0a<\/li>\n<\/ul>\nMyCat\u5b89\u88c5<\/h2>\n
\u5b89\u88c5\u5e76\u542f\u52a8MyCat<\/h3>\n
wget http:\/\/dl.mycat.org.cn\/1.6.7.3\/20190927161129\/Mycat-server-1.6.7.3-release-20190927161129-linux.tar.gz\ntar -zxf Mycat-server-1.6.7.3-release-20190927161129-linux.tar.gz<\/code><\/pre>\n\u8fdb\u5165
mycat\/bin<\/code>\uff0c\u542f\u52a8MyCat<\/p>\n- \n
- \u542f\u52a8\u547d\u4ee4\uff1a
.\/mycat start<\/code><\/li>\n- \u505c\u6b62\u547d\u4ee4\uff1a
.\/mycat stop<\/code><\/li>\n- \u91cd\u542f\u547d\u4ee4\uff1a
.\/mycat restart<\/code><\/li>\n- \u67e5\u770b\u72b6\u6001\uff1a
.\/mycat status<\/code><\/li>\n<\/ul>\n\u8bbf\u95eeMyCat<\/h3>\n
\u4f7f\u7528MySQL\u7684\u5ba2\u6237\u7aef\u76f4\u63a5\u8fde\u63a5mycat\u670d\u52a1\u3002\u9ed8\u8ba4\u670d\u52a1\u7aef\u53e3\u4e3a
8066<\/code><\/p>\nmysql -uroot -p123456 -h127.0.0.1 -P8066<\/code><\/pre>\nMyCat\u5206\u7247<\/h2>\n
\u914d\u7f6eschema.xml<\/h3>\n
\u4ec0\u4e48\u662fschema.xml<\/h4>\n
schema.xml<\/code>\u4f5c\u4e3aMyCat\u4e2d\u91cd\u8981\u7684\u914d\u7f6e\u6587\u4ef6\u4e4b\u4e00\uff0c\u7ba1\u7406\u7740MyCat\u7684\u903b\u8f91\u5e93\u3001\u8868\u3001\u5206\u7247\u89c4\u5219\u3001DataNode \u4ee5\u53caDataHost\u4e4b\u95f4\u7684\u6620\u5c04\u5173\u7cfb\u3002\u5f04\u61c2\u8fd9\u4e9b\u914d\u7f6e\uff0c\u662f\u6b63\u786e\u4f7f\u7528MyCat\u7684\u524d\u63d0\u3002<\/p>\n- \n
schema<\/code> \u6807\u7b7e\u7528\u4e8e\u5b9a\u4e49MyCat\u5b9e\u4f8b\u4e2d\u7684\u903b\u8f91\u5e93<\/li>\nTable<\/code> \u6807\u7b7e\u5b9a\u4e49\u4e86MyCat\u4e2d\u7684\u903b\u8f91\u8868<\/li>\ndataNode<\/code> \u6807\u7b7e\u5b9a\u4e49\u4e86MyCat\u4e2d\u7684\u6570\u636e\u8282\u70b9\uff0c\u4e5f\u5c31\u662f\u6211\u4eec\u901a\u5e38\u8bf4\u6240\u7684\u6570\u636e\u5206\u7247<\/li>\ndataHost<\/code> \u6807\u7b7e\u5728MyCat\u903b\u8f91\u5e93\u4e2d\u4e5f\u662f\u4f5c\u4e3a\u6700\u5e95\u5c42\u7684\u6807\u7b7e\u5b58\u5728\uff0c\u76f4\u63a5\u5b9a\u4e49\u4e86\u5177\u4f53\u7684\u6570\u636e\u5e93\u5b9e\u4f8b\u3001\u8bfb\u5199\u5206\u79bb\u914d\u7f6e\u548c\u5fc3\u8df3\u8bed\u53e5<\/li>\n<\/ul>\nSchema.xml \u914d\u7f6e<\/h4>\n
<?xml version="1.0"?>\n<!DOCTYPE mycat:schema SYSTEM "schema.dtd">\n<mycat:schema xmlns:mycat="http:\/\/io.mycat\/">\n <!--\n schema: \u903b\u8f91\u5e93 name:\u903b\u8f91\u5e93\u540d\u79f0\n sqlMaxLimit\uff1a\u4e00\u6b21\u53d6\u591a\u5c11\u6761\u6570\u636e \u8981\u8d85\u8fc7\u7528limit xxx\n table:\u903b\u8f91\u8868\n dataNode: \u6570\u636e\u8282\u70b9 \u5bf9\u5e94datanode\u6807\u7b7e\n rule\uff1a\u5206\u7247\u89c4\u5219\uff0c\u5bf9\u5e94rule.xml\n subTables: \u5b50\u8868\n primaryKey\uff1a\u5206\u7247\u4e3b\u952e \u53ef\u7f13\u5b58\n -->\n <schema name="TESTDB" checkSQLschema="false" sqlMaxLimit="100">\n <!-- auto sharding by id (long) -->\n <table name="item" dataNode="dn1,dn2,dn3" rule="mod-long"\n primaryKey="ID"\/>\n <\/schema>\n <!-- <dataNode name="dn1$0-743" dataHost="localhost1" database="db$0-743"\/> -->\n <dataNode name="dn1" dataHost="localhost1" database="db1" \/>\n <dataNode name="dn2" dataHost="localhost1" database="db2" \/>\n <dataNode name="dn3" dataHost="localhost1" database="db3" \/>\n <!--\n dataHost: \u6570\u636e\u4e3b\u673a\uff08\u8282\u70b9\u4e3b\u673a\uff09\n balance\uff1a1\uff1a\u8bfb\u5199\u5206\u79bb 0\uff1a\u8bfb\u5199\u4e0d\u5206\u79bb\n writeType\uff1a0 \u7b2c\u4e00\u4e2awriteHost\u5199\uff0c 1 \u968f\u673awriteHost\u5199\n dbDriver\uff1a\u6570\u636e\u5e93\u9a71\u52a8 native\uff1aMySQL JDBC\uff1aOracle\u3001SQLServer\n switchType\uff1a\u662f\u5426\u4e3b\u52a8\u8bfb\n 1 \u4e3b\u4ece\u81ea\u52a8\u5207\u6362 -1 \u4e0d\u5207\u6362 2 \u5f53\u4ece\u673a\u5ef6\u65f6\u8d85\u8fc7slaveThreshold\u503c\u65f6\u5207\u6362\u4e3a\u4e3b\u8bfb\n -->\n <dataHost name="localhost1" maxCon="1000" minCon="10" balance="0"\n writeType="0" dbType="mysql" dbDriver="native" switchType="1"\n slaveThreshold="100">\n <heartbeat>select user()<\/heartbeat>\n <writeHost host="hostM1" url="192.168.24.129:3306" user="root"\n password="root" >\n <\/writeHost>\n <\/dataHost>\n<\/mycat:schema><\/code><\/pre>\n\u914d\u7f6eserver.xml<\/h2>\n
server.xml \u4ecb\u7ecd<\/h3>\n
server.xml<\/code>\u51e0\u4e4e\u4fdd\u5b58\u4e86\u6240\u6709MyCat\u9700\u8981\u7684\u7cfb\u7edf\u914d\u7f6e\u4fe1\u606f\u3002\u6700\u5e38\u7528\u7684\u662f\u5728\u6b64\u914d\u7f6e\u7528\u6237\u540d\u3001\u5bc6\u7801\u53ca\u6743\u9650\u3002<\/p>\nserver.xml \u914d\u7f6e<\/h3>\n
<?xml version="1.0" encoding="UTF-8"?>\n<!DOCTYPE mycat:server SYSTEM "server.dtd">\n<mycat:server xmlns:mycat="http:\/\/io.mycat\/">\n <system>\n <property name="defaultSqlParser">druidparser<\/property>\n <\/system>\n <user name="mycat">\n <property name="password">mycat<\/property>\n <property name="schemas">TESTDB<\/property>\n <\/user>\n<\/mycat:server><\/code><\/pre>\n\u914d\u7f6erule.xml<\/h2>\n
rule.xml<\/code>\u91cc\u9762\u5c31\u5b9a\u4e49\u4e86\u6211\u4eec\u5bf9\u8868\u8fdb\u884c\u62c6\u5206\u6240\u6d89\u53ca\u5230\u7684\u89c4\u5219\u5b9a\u4e49\u3002\u6211\u4eec\u53ef\u4ee5\u7075\u6d3b\u7684\u5bf9\u8868\u4f7f\u7528\u4e0d\u540c\u7684\u5206\u7247\u7b97\u6cd5\uff0c\u6216\u8005\u5bf9\u8868\u4f7f\u7528\u76f8\u540c\u7684\u7b97\u6cd5\u4f46\u5177\u4f53\u7684\u53c2\u6570\u4e0d\u540c\u3002\u8fd9\u4e2a\u6587\u4ef6\u91cc\u9762\u4e3b\u8981\u6709tableRule<\/code>\u548cfunction<\/code>\u8fd9\u4e24\u4e2a\u6807\u7b7e\u3002\u5728\u5177\u4f53\u4f7f\u7528\u8fc7\u7a0b\u4e2d\u53ef\u4ee5\u6309\u7167\u9700\u6c42\u6dfb\u52a0tableRule<\/code>\u548cfunction<\/code>\u3002\u6b64\u914d\u7f6e\u6587\u4ef6\u53ef\u4ee5\u4e0d\u7528\u4fee\u6539\uff0c\u4f7f\u7528\u9ed8\u8ba4\u5373\u53ef<\/p>\n<?xml version="1.0" encoding="UTF-8"?>\n<!DOCTYPE mycat:rule SYSTEM "rule.dtd">\n<mycat:rule xmlns:mycat=\u201dhttp:\/\/io.mycat\/\u201c >\n<tableRule name="sharding-by-intfile">\n<rule>\n <columns>sharding_id<\/columns>\n <algorithm>hash-int<\/algorithm>\n<\/rule>\n<\/tableRule>\n<function name="hash-int"\n class="io.mycat.route.function.PartitionByFileMap">\n <property name="mapFile">partition-hash-int.txt<\/property>\n<\/function>\n<\/mycat:rule><\/code><\/pre>\ntableRule \u6807\u7b7e\u914d\u7f6e\u8bf4\u660e<\/h3>\n
- \n
- name \u5c5e\u6027\u6307\u5b9a\u552f\u4e00\u7684\u540d\u5b57\uff0c\u7528\u4e8e\u6807\u8bc6\u4e0d\u540c\u7684\u8868\u89c4\u5219<\/li>\n
- rule \u6807\u7b7e\u5219\u6307\u5b9a\u5bf9\u7269\u7406\u8868\u4e2d\u7684\u54ea\u4e00\u5217\u8fdb\u884c\u62c6\u5206\u548c\u4f7f\u7528\u4ec0\u4e48\u8def\u7531\u7b97\u6cd5<\/li>\n
- columns \u5185\u6307\u5b9a\u8981\u62c6\u5206\u7684\u5217\u540d\u5b57<\/li>\n
- algorithm \u4f7f\u7528 function \u6807\u7b7e\u4e2d\u7684 name \u5c5e\u6027\uff0c\u8fde\u63a5\u8868\u89c4\u5219\u548c\u5177\u4f53\u8def\u7531\u7b97\u6cd5\u3002\u5f53\u7136\uff0c\u591a\u4e2a\u8868\u89c4\u5219\u53ef\u4ee5\u8fde\u63a5\u5230\u540c\u4e00\u4e2a\u8def\u7531\u7b97\u6cd5\u4e0a<\/li>\n
- table \u6807\u7b7e\u5185\u4f7f\u7528\uff0c\u8ba9\u903b\u8f91\u8868\u4f7f\u7528\u8fd9\u4e2a\u89c4\u5219\u8fdb\u884c\u5206\u7247<\/li>\n<\/ul>\n
function \u6807\u7b7e\u914d\u7f6e\u8bf4\u660e<\/h3>\n
- \n
- name \u6307\u5b9a\u7b97\u6cd5\u7684\u540d\u5b57<\/li>\n
- class \u6307\u5b9a\u8def\u7531\u7b97\u6cd5\u5177\u4f53\u7684\u7c7b\u540d\u5b57<\/li>\n
- property \u4e3a\u5177\u4f53\u7b97\u6cd5\u9700\u8981\u7528\u5230\u7684\u4e00\u4e9b\u5c5e\u6027<\/li>\n<\/ul>\n
\u51e0\u4e2a\u5e38\u7528\u7684\u5206\u7247\u89c4\u5219<\/h2>\n
\u8fde\u7eed\u5206\u7247<\/h3>\n
\u65e5\u671f\u5217\u5206\u533a\u6cd5<\/h4>\n
<!--\u6309\u56fa\u5b9a\u65f6\u95f4\u5206\u7247-->\n<tableRule name="sharding-by-date">\n <rule>\n <columns>create_time<\/columns>\n <algorithm>sharding-by-date<\/algorithm>\n <\/rule>\n<\/tableRule>\n<function name="sharding-by-date"\n class="io.mycat.route.function..PartitionByDate">\n <property name="dateFormat">yyyy-MM-dd<\/property>\n <property name="sBeginDate">2014-01-01<\/property>\n <property name="sPartionDay">10<\/property>\n<\/function><\/code><\/pre>\n<!--\u6309\u81ea\u7136\u6708\u5206\u7247-->\n<tableRule name="sharding-by-month">\n <rule>\n <columns>create_time<\/columns>\n <algorithm>sharding-by-month<\/algorithm>\n <\/rule>\n<\/tableRule>\n<function name="sharding-by-month"\n class="io.mycat.route.function..PartitionByMonth">\n <property name="dateFormat">yyyy-MM-dd<\/property>\n <property name="sBeginDate">2014-01-01<\/property>\n<\/function><\/code><\/pre>\n<!--\n\u6309\u5355\u6708\u5c0f\u65f6\u5206\u7247\n\u9002\u5408\u505a\u65e5\u5fd7\uff0c\u6bcf\u6708\u672b\uff0c\u624b\u5de5\u6e05\u7406\n-->\n<tableRule name="sharding-by-hour">\n<rule>\n <columns>create_time<\/columns>\n <algorithm>sharding-by-hour<\/algorithm>\n<\/rule>\n<\/tableRule>\n<function name="sharding-by-hour"\n class="io.mycat.route.function..LastestMonthPartition">\n <property name="splitOneDay">24<\/property>\n<\/function><\/code><\/pre>\n\u914d\u7f6e\u8bf4\u660e<\/p>\n
\uff081\uff09
tableRule<\/code>\u6807\u7b7e<\/p>\n- \n
columns<\/code>\uff1a\u6807\u8bc6\u5c06\u8981\u5206\u7247\u7684\u8868\u5b57\u6bb5<\/li>\nalgorithm<\/code>\uff1a\u6307\u5b9a\u5206\u7247\u51fd\u6570<\/li>\n<\/ul>\n\uff082\uff09
function<\/code>\u6807\u7b7e<\/p>\n- \n
dateFormat<\/code>\uff1a\u65e5\u671f\u683c\u5f0f<\/li>\nsBeginDate<\/code>\uff1a\u5f00\u59cb\u65e5\u671f<\/li>\nsPartionDay<\/code>\uff1a\u5206\u533a\u5929\u6570\uff0c\u5373\u9ed8\u8ba4\u4ece\u5f00\u59cb\u65e5\u671f\u7b97\u8d77\uff0c\u5206\u969410\u5929\u4e00\u4e2a\u5206\u533a<\/li>\n<\/ul>\n\u8303\u56f4\u7ea6\u5b9a<\/h3>\n
ID\u8303\u56f4\u5206\u533a\u6cd5<\/h4>\n
<tableRule name="auto-sharding-long">\n <rule>\n <columns>user_id<\/columns>\n <algorithm>rang-long<\/algorithm>\n <\/rule>\n<\/tableRule>\n<function name="rang-long"\n class="io.mycat.route.function.AutoPartitionByLong">\n <property name="mapFile">autopartition-long.txt<\/property>\n<\/function><\/code><\/pre>\n\u914d\u7f6e\u8bf4\u660e<\/p>\n
\uff081\uff09
tableRule<\/code>\u6807\u7b7e<\/p>\ncolumns<\/code>\uff1a\u6807\u8bc6\u5c06\u8981\u5206\u7247\u7684\u8868\u5b57\u6bb5
\nalgorithm<\/code>\uff1a\u6307\u5b9a\u5206\u7247\u51fd\u6570 <\/p>\n\uff082\uff09
function<\/code>\u6807\u7b7e<\/p>\nmapFile<\/code>\uff1a\u6307\u5b9a\u5206\u7247\u51fd\u6570\u9700\u8981\u7684\u914d\u7f6e\u6587\u4ef6\u540d\u79f0
\nautopartition-long.txt<\/code>\u6587\u4ef6\u5185\u5bb9\uff1a\u6240\u6709\u7684\u8282\u70b9\u914d\u7f6e\u90fd\u662f\u4ece0\u5f00\u59cb\uff0c\u53730\u4ee3\u8868\u8282\u70b91\uff0c\u6b64\u914d\u7f6e\u975e\u5e38\u7b80\u5355\uff0c\u5373\u9884\u5148\u5236\u5b9a\u53ef\u80fd\u7684id\u8303\u56f4\u5bf9\u5e94\u67d0\u4e2a\u5206\u7247<\/p>\n# range start-end, data node index\n# K=1000,M=10000.\n0-500M=0 0-100 0\n500M-1000M=1 101-200 1\n201-300 2\n1000M-1500M=2\ndefault=0\n# \u6216\u4ee5\u4e0b\u5199\u6cd5\n# 0-10000000=0\n# 10000001-20000000=1<\/code><\/pre>\n\n
\u4f18\u52bf\uff1a\u6269\u5bb9\u65e0\u9700\u8fc1\u79fb\u6570\u636e
\n\u7f3a\u70b9\uff1a\u70ed\u70b9\u6570\u636e\uff0c\u5e76\u53d1\u53d7\u9650<\/p>\n<\/blockquote>\n\u79bb\u6563\u5206\u7247<\/h3>\n
\u679a\u4e3e\u6cd5<\/h4>\n
<tableRule name="sharding-by-intfile">\n <rule>\n <columns>user_id<\/columns>\n <algorithm>hash-int<\/algorithm>\n <\/rule>\n<\/tableRule>\n<function name="hash-int"\n class="io.mycat.route.function.PartitionByFileMap">\n <property name="mapFile">partition-hash-int.txt<\/property>\n <property name="type">0<\/property>\n <property name="defaultNode">0<\/property>\n<\/function><\/code><\/pre>\n\u914d\u7f6e\u8bf4\u660e<\/p>\n
\uff081\uff09
tableRule<\/code>\u6807\u7b7e<\/p>\n- \n
columns<\/code>\uff1a\u6807\u8bc6\u5c06\u8981\u5206\u7247\u7684\u8868\u5b57\u6bb5<\/li>\nalgorithm<\/code>\uff1a\u6307\u5b9a\u5206\u7247\u51fd\u6570<\/li>\n<\/ul>\n\uff082\uff09function\u6807\u7b7e<\/p>\n
- \n
mapFile<\/code>\uff1a\u6307\u5b9a\u5206\u7247\u51fd\u6570\u9700\u8981\u7684\u914d\u7f6e\u6587\u4ef6\u540d\u79f0<\/li>\ntype<\/code>\uff1a\u9ed8\u8ba4\u503c\u4e3a0\uff0c0\u8868\u793aInteger\uff0c\u975e\u96f6\u8868\u793aString<\/li>\ndefaultNode<\/code>\uff1a\u6307\u5b9a\u9ed8\u8ba4\u8282\u70b9\uff0c\u5c0f\u4e8e0\u8868\u793a\u4e0d\u8bbe\u7f6e\u9ed8\u8ba4\u8282\u70b9\uff0c\u5927\u4e8e\u7b49\u4e8e0\u8868\u793a\u8bbe\u7f6e\u9ed8\u8ba4\u8282\u70b9\uff0c0\u4ee3\u8868\u8282\u70b91<\/li>\n<\/ul>\n\u9ed8\u8ba4\u8282\u70b9\u7684\u4f5c\u7528\uff1a\u679a\u4e3e\u5206\u7247\u65f6\uff0c\u5982\u679c\u78b0\u5230\u4e0d\u8bc6\u522b\u7684\u679a\u4e3e\u503c\uff0c\u5c31\u8ba9\u5b83\u8def\u7531\u5230\u9ed8\u8ba4\u8282\u70b9\u3002\u5982\u679c\u4e0d\u914d\u7f6e\u9ed8\u8ba4\u8282\u70b9\uff08defaultNode\u503c\u5c0f\u4e8e0\u8868\u793a\u4e0d\u914d\u7f6e\u9ed8\u8ba4\u8282\u70b9\uff09\uff0c\u78b0\u5230\u4e0d\u8bc6\u522b\u7684\u679a\u4e3e\u503c \u5c31\u4f1a\u62a5\u9519<\/p>\n
partition-hash-int.txt<\/code>\u914d\u7f6e\uff1a<\/p>\n10000=0 \u5217\u7b49\u4e8e10000 \u653e\u7b2c\u4e00\u4e2a\u5206\u7247\n10010=1\n\u7537=0\n\u5973=1\nbeijing=0\ntianjin=1\nzhanghai=2<\/code><\/pre>\n\u6c42\u6a21\u6cd5<\/h4>\n
<tableRule name="mod-long">\n<rule>\n <columns>user_id<\/columns>\n <algorithm>mod-long<\/algorithm>\n<\/rule>\n<\/tableRule>\n<function name="mod-long"\n class="io.mycat.route.function.PartitionByMod">\n <!-- how many data nodes -->\n <property name="count">3<\/property>\n<\/function><\/code><\/pre>\n\u914d\u7f6e\u8bf4\u660e<\/p>\n
\uff081\uff09
tableRule<\/code>\u6807\u7b7e<\/p>\n- \n
columns<\/code>\uff1a\u6807\u8bc6\u5c06\u8981\u5206\u7247\u7684\u8868\u5b57\u6bb5<\/li>\nalgorithm<\/code>\uff1a\u6307\u5b9a\u5206\u7247\u51fd\u6570<\/li>\n<\/ul>\n\uff082\uff09
function<\/code>\u6807\u7b7e<\/p>\n- \n
count<\/code>\uff1a\u8282\u70b9\u6570\u91cf<\/li>\n<\/ul>\n\u4e00\u81f4\u6027hash<\/h4>\n
<tableRule name="sharding-by-murmur">\n <rule>\n <columns>user_id<\/columns>\n <algorithm>murmur<\/algorithm>\n <\/rule>\n<\/tableRule>\n<function name="murmur"\n class="io.mycat.route.function.PartitionByMurmurHash">\n <!-- \u9ed8\u8ba4\u662f0 -->\n <property name="seed">0<\/property>\n <!-- \u8981\u5206\u7247\u7684\u6570\u636e\u5e93\u8282\u70b9\u6570\u91cf\uff0c\u5fc5\u987b\u6307\u5b9a\uff0c\u5426\u5219\u6ca1\u6cd5\u5206\u7247 -->\n <property name="count">2<\/property>\n <!-- \u4e00\u4e2a\u5b9e\u9645\u7684\u6570\u636e\u5e93\u8282\u70b9\u88ab\u6620\u5c04\u4e3a\u8fd9\u4e48\u591a\u865a\u62df\u8282\u70b9\uff0c\u9ed8\u8ba4\u662f160\u500d\uff0c\u4e5f\u5c31\u662f\u865a\u62df\u8282\u70b9\u6570\u662f\u7269\u7406\u8282\u70b9\u6570\u7684160\u500d -->\n <property name="virtualBucketTimes">160<\/property>\n <!-- \u8282\u70b9\u7684\u6743\u91cd\uff0c\u6ca1\u6709\u6307\u5b9a\u6743\u91cd\u7684\u8282\u70b9\u9ed8\u8ba4\u662f1 -->\n <!-- \u4ee5properties\u6587\u4ef6\u7684\u683c\u5f0f\u586b\u5199\uff0c\u4ee5\u4ece0\u5f00\u59cb\u5230count-1\u7684\u6574\u6570\u503c\u4e5f\u5c31\u662f\u8282\u70b9\u7d22\u5f15\u4e3akey\uff0c\u4ee5\u8282\u70b9\u6743\u91cd\u503c\u4e3a\u503c -->\n <!-- \u6240\u6709\u6743\u91cd\u503c\u5fc5\u987b\u662f\u6b63\u6574\u6570\uff0c\u5426\u5219\u4ee51\u4ee3\u66ff -->\n <!-- <property name="weightMapFile">weightMapFile<\/property> -->\n <!-- \u7528\u4e8e\u6d4b\u8bd5\u65f6\u89c2\u5bdf\u5404\u7269\u7406\u8282\u70b9\u4e0e\u865a\u62df\u8282\u70b9\u7684\u5206\u5e03\u60c5\u51b5 -->\n <!-- \u5982\u679c\u6307\u5b9a\u4e86\u8fd9\u4e2a\u5c5e\u6027\uff0c\u4f1a\u628a\u865a\u62df\u8282\u70b9\u7684murmur\uff0chash\u503c\u4e0e\u7269\u7406\u8282\u70b9\u7684\u6620\u5c04\u6309\u884c\u8f93\u51fa\u5230\u8fd9\u4e2a\u6587\u4ef6\uff0c\u6ca1\u6709\u9ed8\u8ba4\u503c -->\n <!-- \u5982\u679c\u4e0d\u6307\u5b9a\uff0c\u5c31\u4e0d\u4f1a\u8f93\u51fa\u4efb\u4f55\u4e1c\u897f -->\n <!-- <property name="bucketMapPath">\/etc\/mycat\/bucketMapPath<\/property> -->\n<\/function><\/code><\/pre>\n\u6d4b\u8bd5\u5206\u7247<\/h2>\n
\u628a\u5546\u54c1\u8868\u5206\u7247\u5b58\u50a8\u5230\u4e09\u4e2a\u6570\u636e\u8282\u70b9\u4e0a\u3002<\/p>\n
![\"MyCat\u5206\u7247\u6d4b\u8bd5\"](\"http:\/\/www.yezhou.me\/AppBlog\/images\/Java\/MyCat\u5206\u7247\u6d4b\u8bd5.png\")
<\/p>\n\u521b\u5efa\u8868<\/h3>\n
\u914d\u7f6e\u5b8c\u6bd5\u540e\uff0c\u91cd\u65b0\u542f\u52a8MyCat\u3002\u4f7f\u7528MySQL\u5ba2\u6237\u7aef\u8fde\u63a5MyCat\uff0c\u521b\u5efa\u8868\u3002<\/p>\n
CREATE TABLE item (\nid int(11) NOT NULL,\nname varchar(20) DEFAULT NULL,\nPRIMARY KEY (id)\n) ENGINE=InnoDB DEFAULT CHARSET=utf8<\/code><\/pre>\n\u5206\u7247\u6d4b\u8bd5<\/h3>\n
\u5206\u7247\u7b56\u7565\u6307\u5b9a\u4e3a
auto-sharding-long<\/code>\uff0c\u5206\u7247\u89c4\u5219\u6307\u5b9a\u4e3amod-long<\/code><\/p>\n","protected":false},"excerpt":{"rendered":"MyCat\u4ecb\u7ecd \u5b98\u65b9\u7f51\u7ad9\uff1a\uff1ahttp:\/\/www.mycat.org.cn\/ MyCat\u6838\u5fc3\u6982\u5ff5 Schema […]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[13],"tags":[297],"class_list":["post-1787","post","type-post","status-publish","format-standard","hentry","category-mysql","tag-mycat"],"_links":{"self":[{"href":"https:\/\/www.appblog.cn\/index.php\/wp-json\/wp\/v2\/posts\/1787","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.appblog.cn\/index.php\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.appblog.cn\/index.php\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.appblog.cn\/index.php\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/www.appblog.cn\/index.php\/wp-json\/wp\/v2\/comments?post=1787"}],"version-history":[{"count":0,"href":"https:\/\/www.appblog.cn\/index.php\/wp-json\/wp\/v2\/posts\/1787\/revisions"}],"wp:attachment":[{"href":"https:\/\/www.appblog.cn\/index.php\/wp-json\/wp\/v2\/media?parent=1787"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.appblog.cn\/index.php\/wp-json\/wp\/v2\/categories?post=1787"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.appblog.cn\/index.php\/wp-json\/wp\/v2\/tags?post=1787"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}
- \u505c\u6b62\u547d\u4ee4\uff1a