[Gllug] best way to update a single production server?

[Simon Wilcox]

On 6/5/09 00:08, James Hawtin wrote:

> One solution I like, is xen and a san, if you get a san with redundancy,
> dual controllers, power supplies etc, that ticks to failure resistant
> box.

You'd think, wouldn't you. As I spent the whole of the bank holiday 
weekend in the datacentre picking up the pieces after our 
super-duper-can't-stop-won't-stop SAN stopped, I'm a bit sore on this 
point :-(

Sure, it's failure resistant but software bugs can still cause outages. 
You'll need to factor in some downtime for firmware updates or make sure 
you provision N+1 storage so that you can migrate volumes onto a spare 
to take the main out for updates.

Simon.
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