From mboxrd@z Thu Jan 1 00:00:00 1970 X-Spam-Checker-Version: SpamAssassin 3.4.4 (2020-01-24) on polar.synack.me X-Spam-Level: * X-Spam-Status: No, score=1.3 required=5.0 tests=BAYES_00,INVALID_MSGID, MSGID_RANDY autolearn=no autolearn_force=no version=3.4.4 X-Google-Language: ENGLISH,ASCII-7-bit X-Google-Thread: 103376,c9355f61e2182b8e X-Google-Attributes: gid103376,public From: Ted Dennison Subject: Re: Gnat & Linux & Ada & DB2 Date: 1999/11/02 Message-ID: <7vmvna$1hd$1@nnrp1.deja.com>#1/1 X-Deja-AN: 543512463 References: X-Http-Proxy: 1.0 x39.deja.com:80 (Squid/1.1.22) for client 204.48.27.130 Organization: Deja.com - Before you buy. X-Article-Creation-Date: Tue Nov 02 15:24:29 1999 GMT X-MyDeja-Info: XMYDJUIDtedennison Newsgroups: comp.lang.ada X-Http-User-Agent: Mozilla/4.6 [en] (WinNT; I) Date: 1999-11-02T00:00:00+00:00 List-Id: In article , "Chris Miller" wrote: > I have just received the free IBM evaluation DB2 for Linux CD and was > wondering what would be involved in calling DB2 from Gnat Ada. If its got a C interface, you can easily write an Ada interface to that in the typical way. > This is really just an experiment to test a long held belief of mine > that it is time that RDB's, like garbage collection, be used on *some* > real time systems. Processing power, memory, disk space - it's all so > cheap these days. I've seen it done on non-hard realtime systems. The issue with hard realtime systems isn't just speed, but determinism. Not only does a query have to be able to finish in a set amount of time, but it has to *always* finish in that set amount of time. In a RDB that depends on the size of the database, its organization, and how the DBMS was written. In short, showing that you will always meet your timing is a non-trivial task and will require a fair amount of support from your DBMS vendor. -- T.E.D. Sent via Deja.com http://www.deja.com/ Before you buy.