Oracle-L: RE: Poll & Questions

From: Hallas John <John.Hallas_at_o2.com>
Date: Wed, 13 Mar 2002 06:23:35 -0800
Message-ID: <F001.0042706E.20020313062335@fatcity.com>

I agree the work involved in creating a representative subset of data , complete with full RI in place can be quite significant. I know there are tools in place that do some of the work (Checkmate by BitybyBit and Quest have one - data factory I think) but these also require significant input and knowledge of the schemas.

More importantly is the performance testing aspect. I have never seen a production system that has been implemented without some unknown/unexpected bottleneck because code has not been tested with realistic volumes. I know there are options available to asisst these days (outlines and stats to name 2) but a full size dev database is not the overhead it may seem. Disk is cheap , time is not.

John

-----Original Message-----
Sent: 13 March 2002 13:13
To: Multiple recipients of list ORACLE-L

Tracy - 75 gb is nothing. Lets see: dba hourly rate to create test from data subset of production vs. cost of 75gb disks? Hmm, seems like a no brainer.

>>> Tracy.Rahmlow_at_aexp.com 03/12/02 05:43PM >>> We currently have a production, system and development database here. The system and development databases are purged periodically and reloaded with lookup data. The developers are then responsible for entering transactional data in both regions. I am looking to follow the same practice for development, however I would like to clone my production database directly to
the system test database. The production database is ~75G. Management does not want to commit $ to a full sized system database. Costs outweigh the benefits. I would like to sway them. HOW? Please give me your costs/benefits
of doing this. In addition, what is the norm (if there can be one) in other shops. Does utopia exist?

ps. One of the biggest reasons for this database would be for benchmarking, timings, stress-testing. I realize I can copy the production stats, but that
won't give me a good execution time. Do others load a subset of data (say 25%)
and then extrapolate to a total time? Is that even necessarily accurate to do?
I have my doubts. Thanks

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Author: Tracy Rahmlow
INET: Tracy.Rahmlow_at_aexp.com

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Author: Hallas John
INET: John.Hallas_at_o2.com

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