<snip> Please can you explain to your audience how long have you been around and how long have you been workling with Adabas, IMS and DB2 ? </snip>
I have been a MVS systems programmer for about 35 years. I have worked with IMS and DB2 for about 5 years. I have never worked with ADABAS. I have no aversion or affinity (currently) to any of the products above. None are in my current environment. IMS is a hierarchal database, and thus uses vastly different data storage/retrieval paradigms when compared to ADABAS or DB2. For single record update/retrieval (e.g. a banking deposit, account inquiry) IMS may be very much faster than ADABAS/DB2. For a report type application, (e.g. show all accounts with activity yesterday) ADABAS/DB2 may very well be faster that IMS. *IT DEPENDS*. My reply intent is to say the only right answer is the one that works for you. In other words caveat emptor. I did not mean to disparage the "expert" in your OP. I do not know if the expert in the OP was a sales engineer, one of your co-workers, or a "true expert" in ADABAS. Regardless s/he should be able to produce supporting documentation to back up his/her claim. (e.g. Transactions rates supported, resources consumed, ....) As with most things in this business, *IT DEPENDS*. Anytime a blanket statement such as X is faster (or better) than Y, objective evidence is required before a decision is made on that basis alone. This does not preclude the fact that X may be still be chosen over Y, but the decision should be based on objective evidence (e.g. Benchmarks, publications by "neutral" parties, etc.), not on unsupported claims of superiority. ---------------------------------------------------------------------- For IBM-MAIN subscribe / signoff / archive access instructions, send email to [EMAIL PROTECTED] with the message: GET IBM-MAIN INFO Search the archives at http://bama.ua.edu/archives/ibm-main.html
