Relay-Version: version B 2.10 5/3/83; site utzoo.UUCP Posting-Version: version B 2.10.3 4.3bsd-beta 6/6/85; site ucbvax.BERKELEY.EDU Path: utzoo!decvax!tektronix!hplabs!ucbvax!UTAH-CS.ARPA!cetron%utah-cbd From: cetron%utah-cbd@UTAH-CS.ARPA (Ed Cetron) Newsgroups: mod.computers.vax Subject: Re: Query about MicroVAX II performance Message-ID: <8605311606.AA01376@utah-cbd.ARPA> Date: Sat, 31-May-86 12:06:17 EDT Article-I.D.: utah-cbd.8605311606.AA01376 Posted: Sat May 31 12:06:17 1986 Date-Received: Sun, 1-Jun-86 05:14:36 EDT Sender: daemon@ucbvax.BERKELEY.EDU Organization: The ARPA Internet Lines: 55 Approved: info-vax@sri-kl.arpa RE: Date: Wed, 28 May 86 10:35:21 edt From: Dean File Subject: Query about MicroVAX II performance >(Yes, I know we can start >using overlays, but won't this slow the response time even more?) yep, it will, A LOT!!!! in answer to your questions: - how does uVAX II handle I/O-intensive operations (6-12 concurrent users)? ok, with the RQDX3 style controllers, you will see a massive increase in speed over the pro350 (let's see, the 350 ~ my 11/23, and my 11/73 was ~3 times as fast, and my uVax II was about 3 times that fast so maybe 6-9 times as fast.....) BUT: with a better controller, you will see wonders. The CS department here did some benchmarks with the Emulex QD32 and a Fujitsu eagle on a MVII with better performance (i/o intensive) than an RA81 on an 11/785..... for a large database, i definately recommend using a big disk configuration (Fuji eagle/QD32 [or equivalent] or KDA50/RA81). - do we need to shoot for maximum-memory (9 MB?) system? probably not, we have 3-4 simultaneous users with large in-memory simulations and only 5 Mb...however, with the costs of 8Mb boards from third party vendors it might actually be better to go to 9 rather than 5 (and the latest from Standard Memories is looking very, very good) - which is better for this--VMS or Ultrix? I will stick my neck out and say VMS, I personally feel that the VMS system is better for this particular application and porting. And yes I speak both fluently so i know whereof i speak..... - will our existing programs (using Datatrieve, BASIC-PLUS-2, FMS, FDT) recompile on a uVAX without modification? if you run VMS probably with 1-2% modification. BP2 is slightly different as is FMS.....but not much. - Any suggestions on other hardware/software we should consider? as i mentioned: 1. big disk - kda50/ra81 or qd32/fuji eagle 2. third party memory - Standard Memories pincomm 630sx (ten year warranty...) 3. at least one TK50 for 'standard' DEC distributions... Ed Cetron Center for Engineering Design Univ. of Utah..... (as is always: these is MY views not my employers, friends, romans or countrymen...) arpa: cetron%utah-cbd@utah-cs.arpa