Corruption happens. Sometimes, it’s little things that cause problems. With MySQL, the mysql command line tool has long held the answer for easy corruption issues. There are a number of tools to repair corruption, but the place to start is the REPAIR command within that trusty mysql command line tool.
To start, let’s try a backup. In this case, I’m going to use a tool those of us who deal with Media Assets frequently tinker with, CatDV. I’m going to backup the databases with a simple mysqldump command, defining the user and then piping the data out to some backup file, which in this case is catdvbak on the desktop:
mysqldump -u catdvadmin -pcatdv catdv > ~/Desktop/catdvbak
If this fails due to corruption then I personally like to stop my databases and back it up flat before I make any changes to it, which a repair command will of course do. Then, we’ll need to tap into mysql:
mysql -P 1099 -p
Then, we will be in an interactive mysql environment. Let’s just say the auditLog in the catdv database is corrupt. First, select the database:
use catdv;
Then, repair that table:
REPAIR TABLE auditLog;
Note: You’ll need to quote things if the name of your table isn’t quite so simple and has special characters.
Then try and re-run your backup if it didn’t complete and you should be good to go! If the repair doesn’t go swimmingly, check out myisamchk for more detailed options.
