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Q & A Repository
Subject: RE: Wang VS 12000 request
Posted By: Thomas Junker In Response To: Re: Wang VS 12000 request (Thomas Junker)
Date: 7/15/02 at 6:10 a.m.
Subject: RE: Wang VS 12000 request ---
Date: Tue, 11 Nov 1997 12:44:05 -0500
On 11 Nov 97 at 9:13, xxxx wrote:
> Thomas, thanks for the response. It's very informative.
You're welcome.
By the way, I currently do system-level app support on an RS/6000AIX system. I'm impressed by some aspects of unix, as I was when I evaluated Bell Labs' offering in about 1978, but I don't consider it a good environment for DP. It may often unavoidable, perhaps, but it leaves a lot to be desired. I come from a command-line-interface minicomputer background and had to make a major adjustment when I moved into the VS some 13 years ago, but the more I learned about the capabilities of the VS the more respect I came to have for it.
The big case of a VS-to-unix migration that crashed and burned and is fairly well known in this area involved Sun as the platform and OS vendor, an independent conversion house, the COBOL vendor, and the file system vendor. The project didn't fail until nearly 100% completion, in the final load testing phase involving live users. At that point it was discovered that the new system ground nearly to a standstill when a magic threshold of some 175 or 275 users was reached, and none of the vendors involved could identify or solve the problem. The VS regularly served something in the neighborhood of 400-500 users and has since grown substantially in the wake of backing out of the migration. A complete rewrite is now in the works only because Wang hadn't yet indicated its intention to build larger models at the time the decision was taken to migrate.
> Our client has a VS12650.
Well, that's not too shabby, but neither is it the current top of the line against which to compare other systems. A field board upgrade to the VS16850 yields a 50% increase in CPU and is rated to take one hour. The VS18XXX will also be a field board upgrade and will nearly double the speed again.
Regards,
Thomas Junker
| SNEAK ATTACKS ON THE VS (views: 450) | Thomas Junker | 7/15/02 at 5:46 a.m. |
| Re: Wang VS 12000 request (views: 467) | Thomas Junker | 11/10/97 at 3:17 p.m. |
| RE: Wang VS 12000 request (views: 553) | Thomas Junker | 7/15/02 at 6:10 a.m. |
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