Re: How do you HA your storage?
2011-05-01 09:32:39 GMT
You could probably do what you want using san level mirroring across two sans and device-mapper-multipath. I believe the sans will automatically put the alternate san copies into read/write if it cannot communicate with the first if it's configured to do so but I don't have access to that capability on my EVA for lack of license. Actually, it woulnd't require a whole other san but if I was mirroring things, that's what I'd opt for. This is the kind of problem that DMP was designed to handle. If you are booting from the san, you may have some other tweeks but in general I think DMP is still the way to go. Good luck -C On Sat, Apr 30, 2011 at 6:00 PM, urgrue <urgrue <at> bulbous.org> wrote: > On 30/4/11 14:27, Corey Kovacs wrote: > > This has nothing to do with any network. It's all over the fiber... > > True, my bad, I was thinking of DRBD. > >> Points in time? It's a raid 1, it's relatively instant. It's more >> complex to manage a failover in the way you describe if anything. > > I didn't mean that. What I meant is with any enterprise storage filer I can > walk in and take a point in time snapshot of my entire datacenter - all > hundreds of servers - with almost no effort. And restore it. That's a pretty > fantastic thing to be able to do before, say, a major upgrade on hundreds of > servers. And you manage all of it in one place. Take a situation like if the > company decides it needs a third copy of the data. It'd be a fun job to map(Continue reading)