[ec2] Best practice for setting up MySQL on ubuntu?
barry.jaspan at acquia.com
Fri Aug 21 23:01:28 BST 2009
> It is still possible to grow an EBS file system without LVM if
> you're willing to have a short amount of downtime, probably in the
> seconds range if done right. (If folks are interested in how to do
> this, let me know).
Sure, I would like to know how to do that. We're using an active/
passive dual-master MySQL setup with application-level failover, so we
can handle taking down our db master one at a time to grow the EBS
volume. I was assuming we'd have to mount a new EBS volume, shut down
mysql, move /var/lib/mysql, and restart the server.
But that will certainly take more than a few seconds, so I'm
interested in your technique.
> The other reason folks use LVM with EBS is to enable suspending the
> file system during an EBS snapshot if they are using ext3. With EBS
> I generally recommend using XFS instead of ext3 as it provides an
> integrated file system freeze and works better on RAIDs of EBS
> volumes if you get to need that for peformance. The tutorial
> demonstrates with XFS.
> The sample snapshot driver script linked to from the above tutorial
> works for simple setups, but I have rewritten and enhanced the
> software dramatically over the last year based on many conditions
> and interactions we found in real world production use.
> I will be publishing the updated snapshot program as open source,
> and in the meantime am providing private preview copies to anybody
> who would like to test it in their own environment.
> Eric Hammond
> -----Original Message-----
> From: Lucas Gates <lucasbgates at yahoo.com>
> Date: Friday, Aug 21, 2009 11:05 am
> Subject: [ec2] Best practice for setting up MySQL on ubuntu?
> To: ec2 at lists.ubuntu.com
>> Some time ago I read on this list that someone was working on a
>> tutorial or script that would make backups of mysql databases via
>> EBS. I believe the solution involved LVM volumes and snapshots.
>> Does anyone know if that is available to the public yet?
>> Lucas Gates
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