If you're using only MyISAM tables, then a good way to do a backup is to use BACKUP TABLE:
[tt]
LOCK TABLE tbl1,tbl2,tbl3;
BACKUP TABLE tbl1,tbl2,tbl3 TO 'k:\tuesday';
UNLOCK TABLES;
[/tt]
This operation simply copies each table's data and format files to the named directory, so it has to be the fastest and most compact backup system possible.
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ALTER world DROP injustice, ADD peace;