进行MySQL大数据库导出的最佳方法

Question

I've usually use mysqldump to export a database. However, when the database is really large, it seems much faster and less intensive to just gzip the database files directly without involving the MySQL deamon and copying that to the other database.

eg:

tar -czvf {db_name}.sql.tgz /var/lib/mysql/{db_name}

Is this a good method of doing this? What are the (dis)advantages?

I also read another post here that mentioned:

rsync /var/lib/mysql/ ...

Would it be a good option to just use rsync to keep a backup db in sync with the development db?

Answer 1

重新提到您提到的第一种方法：我认为mySQL的官方mysqlhotcopy使用了这种方法，因此不可能完全错误。

Answer 2

I've used rsync just fine with moving files around and using them on other boxes. I've never done it with the MYSQL running live, but i've restored from the files in /var/lib/mysql before with no problems. It's a good way to "copy" over databases for your "development" box. I suggest shutting down mysql, moving the files over then starting it back up again. That is how I've done it when necessary.

myqldump gives you nice neat SQL code though, good if you ever need to "tweak" something with sed along the way.

I'd have no worries about using rsync though. I use it for many purposes including pushing code updates out to client machines.