Be careful, I've been involved in ESX fairly thoroughly over the last two years, and snapshots are easily their most misunderstood feature. People abusing snapshots are a minefield waiting to happen. I don't know that it's the same in server, but at least in ESX they're not actual disk files.<div>
<br></div><div>Mike Bean<br><div><br><div class="gmail_quote">On Wed, Sep 22, 2010 at 4:24 PM, David L. Willson <span dir="ltr"><<a href="mailto:DLWillson@thegeek.nu">DLWillson@thegeek.nu</a>></span> wrote:<br><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex;">
In my environment, mostly virtualized servers in VMware Server on Linux, LVM snapshots make simple backups possible. Without LVM snapshots, backups would be a nightmare.<br>
<font color="#888888"><br>
David L. Willson<br>
Trainer, Engineer, Enthusiast<br>
MCT MSCE Network+ A+ Linux+ LPIC-1 NovellCLA UbuntuCP<br>
tel://720.333.LANS<br>
Freeing people from the tyranny (or whatevery) of Microsofty-ness<br>
</font><div><div></div><div class="h5"><br>
----- "Nate Duehr" <<a href="mailto:nate@natetech.com">nate@natetech.com</a>> wrote:<br>
<br>
> On 9/21/2010 11:02 AM, David L. Willson wrote:<br>
> > There are three reasons to use LVM:<br>
> ><br>
> > - Resizing of logical volumes (partition equivalents)<br>
> > - Creation of snapshots (partition-image equivalent, with no down<br>
> time)<br>
> > - Addition and removal of storage devices<br>
> ><br>
> > All those things can be done with the server hot and loaded.<br>
><br>
> ... IF and only IF you ALSO bought hot-swappable drive hardware, and<br>
> trust it won't crash the box, even when the OS is in trouble after<br>
> some<br>
> strange thing the previous drive did as it keeled over dead.<br>
><br>
> ... or you have a bunch of empty disks installed and spinning all the<br>
><br>
> time, creating heat, wasting money.<br>
><br>
> At today's disc prices, LVM is a problem looking for a solution...<br>
> unless the budget is way below where it should be for a business<br>
> server.<br>
><br>
> And it's a solution that adds risk, however small, but it's<br>
> cumulative,<br>
> right? Nothing is bug-free, including LVM.<br>
><br>
> (For home stuff, sure... use LVM... why not? Backups are higher<br>
> priority than LVM, that's for sure...)<br>
><br>
> Nate<br>
><br>
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