If the Mysql is not starting and the error log consists of the below error after the configuration of a slave with the tar file of master.
081022 6:19:02 InnoDB: Warning: shutting down a not properly started
InnoDB: or created database!
081022 6:19:02 /usr/local/mysql4020/libexec/mysqld: Shutdown Complete
InnoDB: Error: data file /mysql/data/mysqld/ibdata1 is of a different size
InnoDB: 128000 pages (rounded down to MB)
InnoDB: than specified in the .cnf file 65536 pages!
InnoDB: Could not open or create data files.
InnoDB: If you tried to add new data files, and it failed here,
InnoDB: you should now edit innodb_data_file_path in my.cnf back
InnoDB: to what it was, and remove the new ibdata files InnoDB created
InnoDB: in this failed attempt. InnoDB only wrote those files full of
InnoDB: zeros, but did not yet use them in any way. But be careful: do not
InnoDB: remove old data files which contain your precious data!
081022 6:19:04 Can’t init databases
081022 6:19:04 Aborting
Then change the below variable as the same in the master cnf file
and start the mysqld server.