Can a MySQL slave be a master at the same time?

Posted by mmattax on Server Fault See other posts from Server Fault or by mmattax
Published on 2010-05-25T17:32:44Z Indexed on 2010/05/25 17:41 UTC
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mysql

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mysql-replication

I am in the process of migrating 2 DB servers (Master & Slave) to two new DB Servers (Master and Slave)

DB1 - Master (production)

DB2 - Slave (production)

DB3 - New Master

DB4 - New Slave

Currently I have the replication set up as:

DB1 -> DB2
DB3 -> DB4

To get the production data replicated to the new servers, I'd like to get it "daisy chained" so that it looks like this:

DB1 -> DB2 -> DB3 -> DB4

Is this possible? When I run show master status; on DB2 (the production slave) the binlog possition never seems to change:

+------------------+----------+--------------+------------------+
| File             | Position | Binlog_Do_DB | Binlog_Ignore_DB |
+------------------+----------+--------------+------------------+
| mysql-bin.000020 |       98 |              |                  | 
+------------------+----------+--------------+------------------+

I'm a bit confused as to why the binlog position is not changing on DB2, Ideally it will be the master to DB3.

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