Neil,

Log backup has a header, and it's impossible to simply concatenate
several
log backups into one huge file.

The best solution is to create a Perl wrapper around ontape, that
can properly replace logical log file for restore with a sequence of
files.

-Alexey


-----Original Message-----
From: informix-list-bounces@iiug.org
[mailto:informix-list-bounces@iiug.org] On Behalf Of Neil Truby
Sent: Friday, September 01, 2006 5:14 PM
To: informix-list@iiug.org
Subject: ontape -l roll-forward of many logs

IDS v7.31 UD8 on solaris

I'm doing a logical log rollforward. The logs are backed up by an
ontape -a
process, to disk, and are about 10m each in size.

It's all working fine if i roll forward one log then in a seprate screen

move the next one into position. But this is a pain in the arse: I have

hundreds to do and want to do them in one fell swoop.

But if I cat all 100 into one large file ontape bombs out almost
immediately
asking if I have more logs. Similarly if I run onlog on the
1concatenation
of 100 logs it reads just the first one and ask me if I have any more.

Why is this happening? I've changed LTAPESIZE in the ONCONFIG file on
the
restored server from 10m to 2g but it's made no difference.

SOMETHING is teling ontape/onlog to read only the first 10m of the
concatenated file. But what?!

Thx

Neil


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