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Re: Move one database to another drive?
Posted by: Nick Hall
Date: December 14, 2009 01:44PM

Thanks for the response Rick. I thought about striping but have decided not to do it because of the strange DB load I am faced with. Right now, this system has one hard drive that is running at about 80% I/O utilization (often up to 100%), almost all writes. This is pretty much entirely due to this one database constantly writing. If I do striping then the load would be spread more so each drive has maybe 40% I/O utilization. However, if I move this one database to its own drive, I won't care if that drive has 100% utilization as the writes are all low priority and no time-dependent queries are done on it, and that would give the primary drive close to 0% I/O utilization so when the other databases need to have queries done, they should respond much more quickly.

I didn't realize that the logs couldn't be split. That is unfortunate and means that this solution probably won't work for me, since with my database doing so many writes that means that there is a lot of I/O constantly going on with the logs too.

I guess the only options I can think of now is that I can either run a separate instance of MySQL on a different port on this other drive, just for this one database, or run a virtual server on the other drive for this database. I'll have to figure out which would be better. Thanks.

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