I’ll show you how to restore the backup, too!
I like to use simple bash scripts to do various tasks. Backing up MySQL is one of them.
I recently decided to start compressing my MySQL backups, as I started including all databases in one fell swoop. I use bzip2 to compress the
.sql files produced by mysqldump. bzip2 is standard on pretty much every *nix operating system, so you likely won’t need to install it.
I’m also using Tarsnap for backups now, which is a great service, btw. So cutting the size down on the backups sent to Tarsnap will save me a bit of money.
I’ll be doing an article later on that focuses entirely on Tarsnap.. I’m pretty in love with it. You can find an article about installing and using Tarsnap, right here at longren.io.
Anyway, here’s the command I use to backup and compress all databases on my MySQL server:
mysqldump -uroot -p --opt --all-databases | bzip2 -cq9 > /home/tyler/mysql-backups/backupname.sql.bz2
That will create a backup of all databases. The
-cq9 piece in the
bzip2 command uses stdin for input and tells bzip2 to be quiet. The number, 9, specifies the compression level that bzip2 should use.
The script embedded in the Gist below is what I use to all my databases to /home/tyler/mysql-backups/, and then that folder gets backed up to Tarsnap.
To restore the database, you’ll want to
.sql.bz2 file first:
That will leave you with a
backupname.sql file. Then bring the resulting
.sql file into MySQL like so:
mysql -uroot -pyourpasswordfornoprompt < backupname.sql
The databases will need to either already exist, or there will need to be
CREATE DATABASE statements in the
.sql file. It’s up to you. I like to create my databases before hand, but it’s just personal preference.
That’s all there is to it. How do you take care of your backups? I’d love to hear how others are doing it. Comments are open.
There’s a thread going on at Hacker News, too.
Update: Made a slight modification to the code and gist suggested by sluggo.
Update 2: HackerNews user Nanzikambe suggested the method above will destroy disk I/O on your server. He suggests using ZFS snapshots instead. The example he posted is in the Gist below, and includes the ability to send the backup to a remote server. A good tutorial on backing up MySQL using ZFS can be found here.