Detailed description of MySQL read/write splitting instances

Detailed description of MySQL read/write splitting instances

MySQL read/write splitting

Another good way to use MySQL read/write splitting is to use com. mysql. jdbc. ReplicationDriver.

After using Amoeba, Cobar, dbware, and other read/write splitting components, one of my friends told me today that MySQL itself can also be read/write splitting, because they provide a new driver called com. mysql. jdbc. replicationDriver

Description: http://dev.mysql.com/doc/refman/5.1/en/connector-j-reference-replication-connection.html

Code example:

import java.sql.Connection;import java.sql.ResultSet;import java.util.Properties; import com.mysql.jdbc.ReplicationDriver; public class ReplicationDriverDemo {  public static void main(String[] args) throws Exception {  ReplicationDriver driver = new ReplicationDriver();   Properties props = new Properties();   // We want this for failover on the slaves  props.put("autoReconnect", "true");   // We want to load balance between the slaves  props.put("roundRobinLoadBalance", "true");   props.put("user", "foo");  props.put("password", "bar");   //  // Looks like a normal MySQL JDBC url, with a  // comma-separated list of hosts, the first  // being the 'master', the rest being any number  // of slaves that the driver will load balance against  //   Connection conn =    driver.connect("jdbc:mysql:replication://master,slave1,slave2,slave3/test",      props);   //  // Perform read/write work on the master  // by setting the read-only flag to "false"  //   conn.setReadOnly(false);  conn.setAutoCommit(false);  conn.createStatement().executeUpdate("UPDATE some_table ....");  conn.commit();   //  // Now, do a query from a slave, the driver automatically picks one  // from the list  //   conn.setReadOnly(true);   ResultSet rs =   conn.createStatement().executeQuery("SELECT a,b FROM alt_table");    ....... }}

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