Date: Mon, 25 Jun 2001 22:48:04 -0600 From: Chris Fedde <chris@fedde.littleton.co.us> To: Andrew Reid <andrew.reid@plug.cx> Cc: freebsd-questions@FreeBSD.ORG Subject: Re: FreeBSD and surviving unclean shutdowns Message-ID: <200106260448.f5Q4m5O24533@fedde.littleton.co.us> In-Reply-To: <993521648.1058.8.camel@percible.alfred.cx>
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On 26 Jun 2001 11:44:08 +0930 Andrew Reid wrote:
+------------------
| While I am resurecting one of my mail servers (which is currently
| running Linux) the thought crossed my mind "How would FreeBSD cope with
| this situation?"
|
| This server is running Software-RAID on a (patched for RAID) 2.2 kernel,
| and last night, the power went out for about three hours. My UPS only
| lasted for 2 of them.
|
| How does FreeBSD cope with these sort of things? My Cache server took
| about an hour-and-a-half of fsck.ext2'ing to come back to a useable
| state.
|
| My primary mail server, as I said is still in pieces and being
| resurected now. I've been contemplating bringing the mail over to
| FreeBSD, but haven't as yet as I've still got to port some PAM stuff
| that we wrote for Linux.
|
| Can someone please comment on this?
+------------------
FreeBSD with softupdates turned on will usually recover well from
a crash. Also on highly available critical systems I would not
choose to run software raid. Better to have hardware raid running 0+1 if you
need it or just buy big disks. With sendmail you can run multiqueue
with symbolic links to "subqueues" on each disk.
Also as you know now it might be a good idea to invest in a sensaphone or
some otherway of having your machine room tell you it is breaking
BTW I didn't realize that christmas island was 9.5 hours east.
--
Chris Fedde
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