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mysqldump for 764000 myisam tables
Posted by: AI Rumman
Date: February 14, 2011 12:55AM

I am running Mysql 5.1 DB for Wordpress Application with Hyperdb plugin enabled.
I have 93000 blogs and for this I have 93000*8(tables per blog) = 764000 tables (MyISAM) in the DB.
I created a backup script to take backup each blog separately and its working fine. But the problem is about timing. Mysqldump is taking almost 2/3 seconds per blog and most of the time are consumed by "SHOW TABLES LIKE" to get the actual tables name (*get_actual_table_name funciton at source code). I changed it for query from INFORMATION_SCHEMA rather that SHOW TABLES and now each log is taking maximum 1 second.

I want to know if you guyes have any other good idea for this huge DB (300GB) backup so that I can go with the default source code.

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