Re: Informix Dynamic Server on IBM SSA

>>> David McNight <dmcnight@bju.edu> 11/12/99 04:38PM >>> >Can any one share their experiences, recommendations, pit-falls, >comments about creating an IDS db engineOLTP environment on an IBM SSA >Raid system? We have 2 SSA adapters and have 4 loops with 4 drives >each. The IBM techs for the Smoothstart services will be coming next >Tuesday to configure the SSA RAID system and I want to configure it >properly for good Informix database performance for an OLTP environment. >We plan to use IDS 7.30 UC9 to start with for IDS. We are thinking about >RAID 5. I am currently planning for 2 DB engines, a production, and a >small home-grown datawarehouse engine that is primarily historical data >from the production databases. Thanks for all suggestions :-)) Don't use RAID5 Make sure the disks are in the drives as per IBM recommendations and remember that moving the trays can move you to a poor config. Check all the cards are in the recommended slots - this can be a biggie. Check out write consistency and seq/parrallel writing. Spend a while looking at the placement of the LVs on disks Paul Watson WF Software Ltd Tel: +44 1436 674729 Fax: +44 1436 678729 www.wfsoftware.com/informix # If you broke it, hide the evidence