Re: informix backups ... not working with caching enabled ?

We have been backing up logical logs for years and never faced this
problem; probably because we saw no need to cache files within our disk
storagepools...

George Lesho
AFC Enterprises!






PAC Brion Arnaud <arnaud.brion AT PANALPINA DOT COM>@VM.MARIST.EDU> on 
11/27/2001
10:21:40 AM

Please respond to "ADSM: Dist Stor Manager" <ADSM-L AT VM.MARIST DOT EDU>

Sent by:  "ADSM: Dist Stor Manager" <ADSM-L AT VM.MARIST DOT EDU>


To:   ADSM-L AT VM.MARIST DOT EDU
cc:    (bcc: George Lesho/Partners/AFC)
Fax to:
Subject:  informix backups ... not working  with caching enabled ?


Hi *SM'ers,

Just wondering if somebody encountered this problem : we are doing
informix backups on a TSM  4.1.1 server, using onbar utility. Informix
logical logs are written to a primary disk pool that has caching
enabled, and a next storage pool defined to allow migration on tape. It
seems that once the disk has been filled, informix is unable to find
free space to send his logs, and migration never happens, even with a
very low "high mig" value.
I believe this is due to caching on this stg pool : when the "percent
utilised" value reaches 100 %, even if this data is only cached files,
neither TSM or Informix are able to overwrite it, and I get a message
like :
11/27/01 11:47:08 ANR0534W Transaction failed for session 17528 for node
SAP02 (TDP Infmx AIX42) - size estimate exceeded and server is unable to
obtain additional space in storage pool SAP_LOGS_DISK.
Once caching disabled, and cached files moved to the next storage pool,
we never face this problem again.
Did anybody already noticed this kind of strange behaviour before, and
eventually found a solution to it ?
TIA.
Arnaud



=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=
| Arnaud Brion, Panalpina Management Ltd., IT Group     |
| Viaduktstrasse 42, P.O. Box, 4002 Basel - Switzerland |
| Phone: +41 61 226 19 78    /    Fax: +41 61 226 17 01 |
=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=