RE: ONTAPE as cron script (error)
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Andreas,
This looks very promising to solve a big headache that we have right
now!!
Environment:
-- DEC UNIX ver. 3.2G (soon migrating to 4.0b)
-- Informix ODS 7.20.UC3 (soon migrating to 7.23.FC4)
Currently, every week night we do a L0 archive to disk. Since the
archive exceeds 2gig,
we have to use the following procedure (TAPEDEV set to
/archive/archive.file, with size 2000000):
1) from first telnet session:
ln -s file1 /archive/archive.file
2) from second telnet session, start the:
ontape -s -L 03) when file1 reaches 2gig, ontape asks for the next "tape"; then
switch back to first session:
rm /archive/archive.file
ln -s file2 /archive/archive.file
4) switch back to second session, and hit <CR> to continue the archive
Naturally, I want to automate this process. But I haven't been able to
figure out how to script the two-session aspect.
Your comment below about "split -b512m" makes me think that there is a
way around the 2 gig limit!!?? What exactly do I need to change in
Sujit's script? What do I need to change in Tape parameters in
onconfig? Any other changes needed anywhere (e.g., UNIX config)? Also,
will the standard "compress" work in place of gzip (yes, I've used gzip
at other sites, and I like it, but I'm not sure if our sys. admin. group
would allow gzip to be installed).
Many, many TIA!
=============================
Paul Mosser, Open Systems DBA
Wells Fargo Bank
Tempe, Arizona, USA
mosserp@wellsfargo.com
> ----------
> From:
> andreas.zeugswetter@telecom.at[SMTP:andreas.zeugswetter@telecom.at]
> Reply To: andreas.zeugswetter@telecom.at
> Sent: Wednesday, November 19, 1997 10:42 AM
> To: informix-list@rmy.emory.edu
> Subject: Re: ONTAPE as cron script (error)
>
>
>
> Hi,
>
> We use a very similar approach as you do and since you were so nice to
> the community I would like to warn you of problems with your script.
>
> kill -9 $bgpid
> is very dangerous, since it could cut off some
> pages from the end of the backup.
> You need to replace the line with:
> wait $bgpid
>
> This will wait for gzip to finish after the pipe is closed
> by ontape.
>
> I also use split -b512m after the gzip, because our backups
> are larger than 2 Gb.
> We also use gzip --fast because it compresses nearly as good
> and gives much better performance.
>
> best regards
> Andreas
>
>
>
>
>
>
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