TUHS

tuhs@tuhs.org

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6557 discussions

Re: [TUHS] dmr streams & networking [was: Re: If not Linux, then what?]

by Norman Wilson

John Reiser did do his own paging system for UNIX 32/V. I heard about it from friends at Bell Labs ca. 1982-83, when I was still running systems for physicists at Caltech. It sounded very interesting, and I would love to have had my hands on it--page cache unified with buffer cache, copy-on-write from the start. The trouble is that Reiser worked in a different group from the original UNIX crowd, and his management didn't think his time well spent on that work, so it never got released. I remember asking, either during my interview at the Labs or after I started work there, why the 4.1 kernel had been chosen instead of Reiser's. It had to do with maintainability: there were already people who could come in and hack on the Berkeley system, as well as more using it and maintaining it, whereas Reiser's system had become a unicorn. Nobody in 1127 wanted to maintain a VM system or anything much close to the VAX hardware. So the decision was to stick with a kernel for which someone else would do those things. Once I'd been there for a year or so and settled in, I found that I was actually looking after all that stuff, because I was really interested in it. (Which seemed to delight a lot of people.) Would we have ended up using Reiser's kernel had I been there a couple of years earlier? I don't know. It is in any case a shame that jfr's code never saw the light of day. I really hope someone can find it on an old tape somewhere and we can get it into the archive, if only because I'd love to look at it. Norman Wilson Toronto ON

5 years, 11 months

Re: [TUHS] systime

by jnc＠mercury.lcs.mit.edu

> From: Steve Simon > i went for a student placement there but didnt get it - i guess my long > hair (then) didn't fit as the interview seemed good. Maybe you seemed too honest! :-) Noel

5 years, 11 months

Re: [TUHS] dmr streams & networking [was: Re: If not Linux, then what?

by Rudi Blom

Just to be precise and because I dislike loose ends :-) Found the XTI to TCP/IP diagram. It's even online! https://www.cs.auckland.ac.nz/references/unix/digital/APS2WDTE/TITLE.HTM Network Programmer's Guide © Digital Equipment Corporation 1994, 1995, 1996 All Rights Reserved. Product Version: Digital UNIX Version 4.0 or higher March 1996

5 years, 11 months

Re: [TUHS] dmr streams & networking [was: Re: If not Linux, then what?]

by Rudi Blom

I don't remember from where I got the scheme, so it might be general, DigitalUnix, or HP-UX related. Checking the "HP 9000 networking XTI programmer's guide" from 1995 there's no diagram. The application which was initially developed on a SystemV derived UNIX the Computer division of Philips Electronics had bought, used TLI. Taken over by DEC we moved to SCO UNIX still using TLI, moving to XLI on Alpha/Digital Unix. The nice thing of TLI/XLI is the poll(). A multi-client server can check a list of file descriptors AND indicate a timeout value for the poll(). Like in ret_cd = poll(tep->CEPlist, tep->CEPnumb, timeout); BTW putting in a bit of OSI, on SCO UNIX I use a DEC package which offers a TLI interface to an OSI TP4/IP stack. Even worked using X.25 as WAN. OSI TP4 and NetBIOS originally bought from Retix. >Date: Sat, 31 Aug 2019 11:41:40 -0400 >From: Clem Cole <clemc(a)ccc.com> >To: Rudi Blom <rudi.j.blom(a)gmail.com> >Cc: tuhs <tuhs(a)minnie.tuhs.org> >Subject: Re: [TUHS] dmr streams & networking [was: Re: If not Linux,then what?] >Message-ID: > <CAC20D2MJPFoU6r73U9GDaqG+Q7vpH3T7CiDNjgN3D2uyuAJgLQ(a)mail.gmail.com> >Content-Type: text/plain; charset="utf-8" > >It's the Mentant implementation that HP originally bought. At LCC we had >to hacked on it a bit when we put Transparent Network Computing (TNC) stuff >in HP-UX [we had full process migration working BTW -- A real shame that >never shipped]. >On Sat, Aug 31, 2019 at 5:44 AM Rudi Blom <rudi.j.blom(a)gmail.com> wrote: >> Whenever I hear UNIX, networking and streams I have to think about this >> scheme. >> >> Still using this, even on HP-UX 11.31 on Itanium rx-servers >> >> Cheers, >> uncle rubl

5 years, 11 months

ISO, OSI, and DECnet (was Re: If not Linux, then what?)

by Paul Winalski

On 8/28/19, Clem Cole <clemc(a)ccc.com> wrote: > On Wed, Aug 28, 2019 at 2:46 AM Peter Jeremy <peter(a)rulingia.com> wrote: > > Tru64 talked to DECnet Phase X (I don't remember which one, maybe 4 or 5), > which had become an ISO/OSI stack by that point for political reasons > inside of Digital (the OSI vs TCP war reminded me of the Pascal vs C and > VMS vs UNIX wars - all very silly in retrospect, but I guess it was really > about who got which $s for development). It was DECnet Phase V that was based on the ISO/OSI stack. IIRC, at the time the European telcos were pushing OSI, it had become an ISO standard, etc. etc. It was also pretty easy to compatibly slide the legacy proprietary DECnet Phase IV adaptive routing and virtual circuit layers into the OSI stack. TCP won the war, of course. The risk with international standards fashioned out of whole cloth by a committee (as opposed to being a regularization of existing practice) is that the marketplace may choose to ignore the "standard". OSI and the Ada programming language are cases in point. -Paul W.

5 years, 11 months

If not Linux, then what?

by Arthur Krewat

https://linux.slashdot.org/story/19/08/26/0051234/celebrating-the-28th-anni… Leaving licensing and copyright issues out of this mental exercise, what would we have now if it wasn't for Linux? Not what you'd WANT it to be, although that can add to the discussion, but what WOULD it be? I'm not asking as a proponent of Linux. If anything, I was dragged kicking and screaming into the current day and have begrudgingly ceded my server space to Linux. But if not for Linux, would it be BSD? A System V variant? Or (the horror) Windows NT? I do understand that this has been discussed on the list before. I think, however, it would make a good late-summer exercise. Or late winter depending on where you are :) art k.

5 years, 11 months

early vm systems

by Steve Simon

hi the other early vm system not mentioned yet is the one Charles Forsyth wrote at the university of york for sunos. i never used it as i was learning v7 on an interdata 30 miles away at the time but i read his excellent paper on it. -Steve

5 years, 11 months

Re: [TUHS] dmr streams & networking [was: Re: If not Linux, then what?]

by Rudi Blom

Whenever I hear UNIX, networking and streams I have to think about this scheme. Still using this, even on HP-UX 11.31 on Itanium rx-servers Cheers, uncle rubl

5 years, 11 months

Re: [TUHS] Running v10

by Norman Wilson

Check out "Setting Up a Research UNIX System" by Norman Wilson. troff sources are in v10. ==== But that assumes you're being given a root image to copy to the disk initially, no? We never made a general-purpose distribution tape; we just made one-off snapshots when someone wanted a copy of the system in the 10/e era. Is there a binary root image in Warren's archive? I forget. Norman Wilson Toronto ON (where the weather feels like NJ these days, dammit)

5 years, 11 months

ARS Technica on UNIX @ 50

by Clem Cole

https://arstechnica.com/gadgets/2019/08/unix-at-50-it-starts-with-a-mainfra…

5 years, 11 months

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