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- Newsgroups: comp.unix.ultrix
- Path: sparky!uunet!ferkel.ucsb.edu!taco!rock!stanford.edu!ames!decwrl!pa.dec.com!nntpd2.cxo.dec.com!nabeth!alan
- From: alan@nabeth.enet.dec.com (Alan Rollow - Alan's Home for Wayward Tumbleweeds.)
- Subject: Re: 3 peeves re: Ultrix 4.3
- Message-ID: <1992Nov5.201233.6566@nntpd2.cxo.dec.com>
- Lines: 60
- Sender: alan@nabeth (Alan Rollow - Alan's Home for Wayward Tumbleweeds.)
- Reply-To: alan@nabeth.enet.dec.com (Alan Rollow - Alan's Home for Wayward Tumbleweeds.)
- Organization: Digital Equipment Corporation
- References: <ggm.720916451@brolga>
- Date: Thu, 5 Nov 1992 20:12:33 GMT
-
-
- In article <ggm.720916451@brolga>, ggm@brolga.cc.uq.oz.au (George Michaelson) writes:
- >
- >
- >(1) Can somebody from DEC please state what advantages lie in using
- > SCSI/CAM:
- >
-
- As mentioned by AJ one of the good reasons is correctness. It is a much
- more standard driver than the current one. Another reason is that it
- will be the base system driver in OSF and a future version of ULTRIX. There
- are some devices that are supported by the CAM driver that ARE NOT supported
- by the current driver; larger than 2 GB capacity tape drives among them.
-
- >(2) Can somebody from DEC who knows DECmcc explain why we are meant to
- > be pleased that DECmcc needs SQL, but DEC have just unbundled it.
-
- Something like this question was answered somewhere around here recently
- and I think the answer is "SQL will be included with DECmcc". Or maybe
- that was the answer that went with FullSail, which also uses ULTRIX/SQL.
- It was certainly not an attempt by DEC to trap or con anybody.
- >
- >(3) Can somebody from DEC comment on the perception that 4.3 is a dog
- > of a release.
-
- 1. A commentary on perception. The people that perceive a problem are
- also the ones that tend to be the most vocal. There may also be a
- tendency for people not having a problem to sit quiet and watch.
-
- 2. Appendix A of the ULTRIX V4.3 Release Notes has 28 pages of problems
- that were fixed since the last release. Unfortunately along the way
- some new bugs got introduced and a number of "favorite" bugs didn't
- get fixed.
-
- 3. Some very significant new functionality was added in V4.3. The one
- you mention is the I/O enhancements. For some well understood I/O
- loads, it provides exceptional I/O improvement. I've seen two posting
- that indicated the performance got worse when implementing these
- changes, and I think they were from the same person. Clearly, there
- other I/O loads that don't behave well when large I/O requests
- are preferred.
-
- I personally find #3 to be an interesting problem, because of my interest
- in I/O subsystems. I also have NO idea at all what the problem is. If
- the person that posted the original complaint is still around, send me
- mail and maybe I can find a clue. He should also be working the problem
- through the CSC, which has access to the engineering group responsible
- for the changes. I'm pretty much stuck out in the middle of Colorado,
- cut off from everybody.
- >
- >-George
- >--
- > George Michaelson
- >G.Michaelson@cc.uq.oz.au The Prentice Centre | There's no market for
- > University of Queensland | hippos in Philadelphia
- >Phone: +61 7 365 4079 QLD Australia 4072 | -Bertold Brecht
- >
- --
- Alan Rollow alan@nabeth.cxo.dec.com
-
-