On Fri, August 26, 2011 00:44, Johan De Meersman wrote: > ----- Original Message ----- >> From: "Adarsh Sharma" <adarsh.sha...@orkash.com> >> >> Today by chance I am checking the space in mysql data directories. > > By chance? That should be automated, as should a million other standard > checks. Install Nagios. > >> When it becomes full, I am sure my server down. Can anyone Please let >> me know the steps I need to follow in this condition. > > Pretty obvious: add space or remove data. > > Given that you say it's MyISAM data taking up the space, you simply need > to optimize the tables to reclaim free space inside the datafiles - but > make sure there's enough free space for a full copy of the remaining data, > so start optimizing the smallest tables first. For InnoDB it's quite a bit > more trouble. > > If there's no data you can delete, you could have a look at wether there's > tables that don't need to be written to anymore - or set up archiving > tables for exactly that purpose; you can convert those to compressed > MyISAM, that should save quite some space, too. > > Adding disks, well... if you set up the server with LVM or MD that > shouldn't be too hard, but it looks like you didn't. Welcome to > screwville. You'll need to swap out the disk for a larger one (yes, > downtime) and copy all the data. That, or *add* a disk, set that one up > with LVM, copy the data there and then add the old disk as a second > physical volume and expand the logical volume. > > > And this, dear pupils, is why we tell the marketeers to go screw > themselves until they can provide a three-year volume estimate. > I would only add, while you are in there, add two disks and use MD to create raid 1 and the put LVM on top of that. With MD you can replace one of the underlying drives with a larger one move that in and then replace the other bring that in and increase the available space. BTW: on modern processors, I've found MD to be faster than Hardware Raid unless you go real high end. Plus you can put the disks on separate controllers. Not a trivial exercise, but you are not locked it. ------ William R. Mussatto Systems Engineer http://www.csz.com 909-920-9154
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