I would echo what Dan says. In addition, from the slave server, you
might look at running the new mysql-parallel-dump tool that Baron
Schwartz has developed. It essentially does a dump with a thread
running (by default) for each CPU core you have. A dual core box will
run two threads and dump roughly twice as fast as a normal mysqldump.
In addition, it compresses the output making it much more compact. He
has renamed the toolkit to Maatkit and it is available at
http://maatkit.sourceforge.net/.
Also, you might look into using an LVM snapshot to run the copy from.
That way it doesn't interfere with your operations as much. I do that
for some of our production slave servers myself.
Keith
Dan Buettner wrote:
I'd strongly recommend setting up replication, and then taking your backups
from the replica.
mysqlhotcopy works great, I used it for years myself, but it does require
"freezing" your database while the copy happens. And no matter how you do
it, copying 20 GB takes a little bit of time.
Dan
On Nov 27, 2007 4:35 PM, David Campbell <[EMAIL PROTECTED]> wrote:
Andras Kende wrote:
Hi,
What is the preferred way to backup a 20GB database daily,
without taking offline ?
MySQL 4.1 MyISAM - (will be updated to MySQL 5)
133 table(s) Sum 115,416,561 latin1_swedish_ci 20.1 GB
Mysqlhotcopy
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