Jared & Gene,
Any backup strategy that gives me more than one recovery option is viable in
my mind. Consequently I use a mix of hot and cold backups as well as keeping my
archive logs around for a long while. At least as long as the oldest cold
backup.
Dick Goulet
____________________Reply Separator____________________
Author: [EMAIL PROTECTED]
Date: 10/4/2001 2:30 PM
Well, if you can live with losing data due to a crash, or if
your data is all static, no problem I guess.
Jared
"Gene Sais"
<[EMAIL PROTECTED] To: <[EMAIL PROTECTED]>,
<[EMAIL PROTECTED]>
ach.fl.us> cc:
Subject: RE: Backup Strategy
10/04/01 02:23 PM
I see 2 advantages of cold over hot backups:
1) Archive log mode not required for cold backups. Dev & Test DB's do not
need archive space.
2) Cold backups follow the KISS principle. Shutdown db, tar, dump, cpio,
dd, etc. the datafiles, redo logs, ctl files, oracle filesystems, etc. to
tape, Startup db, Done. Take the tape to same or another server and
restore, No Oracle cmds required (filesystems being the same). Now for Hot
Backups, we have to add a step. Not a big step :) We need the arcs and
need to recover the db.
Gene
* Still not convinced backing up closed files are not safer/better than
open files :) *
>>> <[EMAIL PROTECTED]> 10/04/01 04:59PM >>>
OK, I'll bite, what OS commands?
As for cold backups, and I'm sure you've heard this already, they're only
really needed after you open a database with 'resetlogs' . Otherwise it
is not necessary to use a cold backup.
Jared
"Gene Sais"
<[EMAIL PROTECTED] To: Multiple recipients of
list ORACLE-L <[EMAIL PROTECTED]>
ach.fl.us> cc:
Sent by: Subject: RE: Backup
Strategy
[EMAIL PROTECTED]
10/04/01 02:10 PM
Please respond to
ORACLE-L
Well for 1 reason, Cold backups are restored using OS cmds, no need for
Oracle recovery, whereas, Hot Backups require OS cmds + Oracle recovery.
One exception is pt in time recoveries. I do have 1 db that will be
web-enabled, therefore 24x7. So guess what I have to do, Hot Backups. I
am not against them, just prefer cold. Anyone have hot backup scripts?
Lisa, you are the script ninja, got 1 of those scripts lying aorund.
Thanks :)
Gene
>>> [EMAIL PROTECTED] 10/04/01 04:00PM >>>
Why is better Gene? What is it about the files being closed
that gives you the trust factor? I don't use RMAN here either
but its more because my backup method works wonders and I just
don't need those extra features that RMAN provides.
There are a lot of sites out there that cannot afford to have
the database come down even for 5 minutes so you might want
to spend some time getting the warm fuzzies over hot backups.
I swear, they work.
-----Original Message-----
Sent: Thursday, October 04, 2001 12:25 PM
To: Multiple recipients of list ORACLE-L
I personally prefer cold backups over hot. Always better when the files
are
closed. But hey, this is coming from someone who still doesn't trust Rman
:)
Gene
>>> [EMAIL PROTECTED] 10/04/01 12:40PM >>>
I agree with your export statement but I must question this one. I cannot
think of a single reason to get a cold backup over a hot backup. I can
think of reasons for cold backups but if I was doing hot backups already I
would not shutdown my database just to get a cold. There is a myth out
there that hot backups are not as reliable as cold backups and its false.
Your really not saving anything time wise if there is a crash (unless of
course all your disks crash as you are bring up the database).
Weekly cold backups are a good plan.
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