as2d+@andrew.cmu.edu (Alan Henry Stein) (09/01/89)
As part of a research grant, we are going to have money to purchase a PC. The thing is going to have to run microsimulation on pretty large datasets. At present, a 20mHz 386 is taking about 20minutes to process about 20,000 elements. We are planning on increasing both the size of the dataset and the length into the future the simulation runs. To this end, we will like purchase a 33mHz 386. It will have to have a large, fast hard disk and probably 4-8 megs of memory?? Any suggestions?? Thanks, alan as2d@andrew.cmu.edu
cpcahil@virtech.UUCP (Conor P. Cahill) (09/02/89)
In article <UYzeBCy00Uh-Q19ZkM@andrew.cmu.edu>, as2d+@andrew.cmu.edu (Alan Henry Stein) writes: > > To this end, we will like purchase a 33mHz 386. It will have to have a > large, fast hard disk and probably 4-8 megs of memory?? I have a Tangent 386 super tower 33Mhz 386. The motherboard is AMIs. I have the following additions: Super tower with 10 1/2 hight bays, 300 watt ps 16 Meg of memory 80387 coprocessor (33 Mhz) 2 650 Meg ESDI hard drives (10.7ms access time) DPT intelligent disk controller with 2 1/2 megs of disk cache Sigma Designs Laser View 1600x1200 X windows display 19" Monochrome monitor 60 Meg Tape Drive Western Digital Ethernet Card Total cost for the system was around $25,000 plus 3K for the OS (386/ix unlimited users with lots of packages (X11, tcp/ip, nfs, development...). I am pleased with tangent's service. They delivered the system fully installed and configured. All I had to do was plug in the monitor, keyboard, and power and I was up and running. (Although I did re-layout the data on the hard disk because I didnt want to have on big 400meg /usr2 partition). The only problem I have had with the system has been in adding a Maxspeed serial board. There seems to be some collision with the higher memory locations on the memory expansion card and the memory used for the maxspeed card. The performance of the system is superb. I normally have 3 people working on the system (myself in about 5 xterms plus the usual set of xclock, xload, and whatever the mailbox program is) without any performance degredation ?sp? even when we are making a tape backup and receiving our daily 4 meg of news junk. We develop UNIFY database applications and the performance gain over the standard 16/20 Mhz systems is outstanding. ACCELL 4GL programs run like fire... -- +-----------------------------------------------------------------------+ | Conor P. Cahill uunet!virtech!cpcahil 703-430-9247 ! | Virtual Technologies Inc., P. O. Box 876, Sterling, VA 22170 | +-----------------------------------------------------------------------+
larry@nstar.UUCP (Larry Snyder) (09/04/89)
In article <1112@virtech.UUCP>, cpcahil@virtech.UUCP (Conor P. Cahill) writes: > The only problem I have had with the system has been in adding a > Maxspeed serial board. There seems to be some collision with the > higher memory locations on the memory expansion card and the > memory used for the maxspeed card. I have never heard of the Maxspeed serial boards. Fill me in. > any performance degredation ?sp? even when we are making a tape > backup and receiving our daily 4 meg of news junk. Which tape backup are you using? Are you using the sample backup scripts available through sysadm? -- Larry Snyder uucp:iuvax!ndcheg!ndmath!nstar!larry The Northern Star Usenet Distribution Site, Notre Dame, IN USA