Ron Johnson wrote:
On 12/19/08 13:09, Nate Duehr wrote:
Douglas A. Tutty wrote:
On Wed, Dec 17, 2008 at 08:42:15PM -0600, Ron Johnson wrote:
On 12/17/08 19:51, Douglas A. Tutty wrote:
As far as I know, Debian doesn't have an installer feature like
OpenBSD's where you can boot the installer, set up the disk
partitions,
and run restore right from there (from tape, presumably a raw drive
partition as well, I don't know).
That's one "large-systems" feature which Linux really misses.
Real large-systems aren't taken off-line or ever restored from that
low a level, usually.
If they are, it's because there was 8 feet of water in the server room,
Or an idiot plumber with a brazing torch sets off the sprinklers, which
dump thousands of gallons of water, which, naturally, flow down to the
sub-basement data center, dropping right down on top of "my" SAN.
and even then, you probably failed over to your cold-site before it
got that bad.
Unless the gov't agency who's contracted with you is too cheap to pay
for a cold-site. (Of course, after the "rain shower", they wised up and
now pay for the cold site.)
If you just had a hardware failure, you're probably already running on
the warm/hot spare system by the time you look into it.
So... you might be thinking "mid-sized" PC-based systems. ;-)
No, these actually are large systems. A combination of Z/OS, OpenVMS
and HP-SUX all in a 24x364 DC. Lots and lots of tape silos and twice
daily visits from Iron Mountain couriers.
Agreed. In fact, I would say the vast majority of the large systems out
there do not have hot backups. It is very expensive to maintain a hot
backup; unless it is super critical they be up 24/7 (i.e. airline
reservation systems, NORAD, etc.), chances are they have regular backups
and off-site storage.
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