On 11/23/2007 21:59 PM, "Don Montalvo" <email@hidden> wrote:
>
> The instructions for setting up IPFailover in Apple's PDF seem pretty
> straight forward:
>
> http://images.apple.com/server/pdfs/High_Availability_Admin_v10.4.pdf
>
> ...is setting up IPFailover as easy as Apple makes it out to be?
> What's your experience?
What are you actually trying to provide high availability *for*. Depending
on the service, there may be other/better ways to do this.
>
> For the second half of the equation, I'd like to have an Apple RAID
> (14x750) set up with RAID-5 on both sides. They need to kept in sync
> so when Xserve1 (which will be connected to the left side of the RAID)
> dies, Xserver2 will grab the IP and chug along with the right side of
> the RAID.
>
> This means I need to sync both halves of the RAID. Apple mentions
> rsync in their High Availability PDF, but from what I've read, this
> part may not be reliable given rsync issues (dhan, feel free to chime
> in! <G>). If rsync will work, would like to see some real life
> examples of how people are keeping two volumes in sync...if rsync
> isn't the answer, what is?
XSan. That allows for multiple devices to talk to the same storage pools, no
sync'ing needed. Syncing is cheaper, but if you want HA, then cheap is not
the way to go here. Setting up Xsan is initially more expensive, but, esp.
with Mac OS X 10.5, provides you with far more HA options than you'd
otherwise have.
--
John C. Welch Writer/Analyst
Bynkii.com Mac and other opinions
email@hidden
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