Row cannot be located for updating mysql server

The next thing we need to to is to replicate all the commands received by Server A to Server B: in other words, we need to configure Server B as a slave of Server A.

In order to do so, connect to Server A (via SQLyog, query browser or console) and type the following sql command: ------------------ ---------- -------------- ------------------ | File | Position | Binlog_Do_DB | Binlog_Ignore_DB | ------------------ ---------- -------------- ------------------ | mysql-bin.000001 | 107 | example | test, informatio | ------------------ ---------- -------------- ------------------ 1 row in set (0.00 sec) STOP SLAVE; CHANGE MASTER TO MASTER_HOST = 'Server A IP Address', MASTER_USER = 'replicator', MASTER_PASSWORD = '[replicator_password]', MASTER_LOG_FILE = 'mysql-bin.000001', MASTER_LOG_POS = 107; START SLAVE; Now you need to do the same thing from the other side.

If a user registration information is updated on S1, the same information should be updated on S2. How can I create a trigger so that every time there is an insert / update / delete in database on S1, then the user table on S2 also gets automatically updated. storage engine on both servers, in conjunction with triggers, to allow each server to update the other server's database.

And every time there is an insert / update / delete in database on S2, then the user table on S1 also get automatically updated. This is not exactly a simple out-of-the-box solution, because it requires additional precautions and requires you to decide whether consistency or isolation tolerance is more important and allow the queries to fail when the other server isn't available (more consistency) or use a CREATE TABLE remote_user ( username varchar(64) NOT NULL, password varbinary(48) NOT NULL, /* encrypted of course */ PRIMARY KEY(username) ) ENGINE=FEDERATED DEFAULT CHARSET=utf8 CONNECTION='mysql://username:[email protected]_other_host:port/schema/user'; Selecting from remote_user on one server will retrieve the records from the other server, and insert/update/delete on that table will change data on the other server.

If you already have a My SQL instance up and running on one of them, just upgrade it to the latest version you feel confident to use and then install that same identical version to the other one.

They are written as triggers, with the idea being that we don't want to do something to ourselves that we can't do to the other server -- for example, if a username already exists on the other server, but not here, we want the insert on the other server to throw an error that prevents us from creating the user here...

Please notice that this configuration will replicate/mirror each and every db with the sole exception of test and information_schema.

You might also want to keep out other databases such as mysql or other ones: if that’s the case, just add those you want to exclude by adding a binlog-ignore-db and replicate-ignore-db command for each one of them.

, is by far the simplest technique you can use to increase the performance and the reliability of your My SQL server installation.

If you don’t know what it is, just imagine two My SQL server instances continuosly updating each other in real-time while fullfilling their job.

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