Mysql Replication master-slave/master-master

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http://www.mysqlperformanceblog.com/2007/01/19/tmp_table_size-and-max_heap_table_size/

TMP_TABLE_SIZE and MAX_HEAP_TABLE_SIZE

January 19, 2007 By Peter Zaitsev 16 Comments We all know disk based temporary tables are bad and you should try to have implicit temporary tables created in memory where possible, do to it you should increase tmp_table_size to appropriate value and avoid using blob/text columns which force table creation on the disk because MEMORY storage engine does not support them Right ? Wrong.
Je me suis déjà fait avoir 2 fois par cette option.

Modifier le innodb_log_file_size | Un bout de DBA

http://www.noidea.ca/2008/05/22/modifier-le-innodb_log_file_size/
http://www.howtoforge.com/mysql_master_master_replication

Master Master Howto

This tutorial describes how to set up MySQL master-master replication. We need to replicate MySQL servers to achieve high-availability (HA).

really interresting example and comments by harlequin Jan 7