re:
http://www.garlic.com/~lynn/2007b.html#25 What is command reject trying to
tell me?
and just for the fun of it ... another post mentioning contingent connection
http://www.garlic.com/~lynn/2007b.html#26 How many 36-bit Unix ports in the old
days?
as i mentioned before
R.S. writes:
Additional security also raises the price. Almost always.
Additional complexity doesn't always mean additional security,
sometimes the opposite.
any add-on features increase complexity ... complexity increases costs
... complexity also tends to make infrastructures more vulnerable
Howard Brazee writes:
One of the tough choices programmers come up with is when a 30 year
old program that has been modified every year - should be replaced.
This type of decision becomes more difficult with people who design
operating systems and systems that interface with other systems.
Arthur T. wrote:
also didn't list some minor ones (like the code to the push-button locks
on the doors). I also didn't list all of the passwords and PINs needed
in my personal life. Note that in about a quarter of the above, I could
not be sure that the password was end-to-end encrypted,
[EMAIL PROTECTED] (Arthur T.) writes:
You pick ease over security. At my old shop, we had several
RACF-protected systems plus one VM system that held the password
unencrypted. Most people used the same password on all, making them
none of them secure. Many people also used the same
Rick Fochtman wrote:
The nature of our business was such that we handled large amounts of
other people's money on a daily, and even hourly, basis. When I started
there, in 1981, I was told that we processed enough money in a week to
pay the National Debt. Needless to say, security and employee
Charles Mills wrote:
Pet peeve. Saying mainframes versus servers is like saying Fords versus
cars. A mainframe typically IS a server (often among other roles). The first
definition Google comes up with for server is A computer that delivers
information and software to other computers linked by
Ed Gould wrote:
Never heard of it so I guess it, that doesn't mean it never existed
just an extremely small audience. I don't recall ever hearing
anything about VF . I would expect if it were popular that there
would be a current model, no?
I am guessing that VF stands for vector facility
[EMAIL PROTECTED] (Rick Fochtman) writes:
No argument here. But the hardware evolution in terms of RAS has made
the MF KING in this area. MF had a poor record to start, but it's
improved immeasurably over the last 40+ years, with the evolution of
microcode and things like automatic recovery and
Binyamin Dissen wrote:
By CP, I was referring to VM CP. Not TSO CP.
VM CP is a hypervisor which runs MVS as a client.
from long ago and far away, I had done IPCS superset written in rexx (when it
was still called rex and hadn't been release as a product) ... which was
initially line-mode
[EMAIL PROTECTED] (Ed Gould) writes:
I have been exposed to two different channel extenders over the
years. Of the two each had its own weaknesses. I won't talk about
brand names other than to say they were from different parts of the US.
The first (and second) seemed to drive IOS nuts and
Nigel Hadfield wrote:
And a wonderful company called Enterprise Computer Services made a very good
living for a number of years upgrading, downgrading, and crossgrading 3090s,
by doing just that with IBM's engines. Made much easier once a good late
friend and colleague had essentially hacked the
[EMAIL PROTECTED] wrote:
That reminds me. The first ATMs in Canada I saw at my bank were made by
IBM - and they used a formed-character printer to print the information
about the transaction on card stock media.
It was apparent to me that what they were using was exactly the right
size to be a
Edward Jaffe wrote:
Untrue! There are no Program Exceptions whatsoever listed for the LA
instruction in PoOp. In fact, it specifically states:
No storage references for operands take place, and the address is not
inspected for access exceptions.
you can get instruction fetch program
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IBM sues maker of Intel-based Mainframe clones
http://www.eetimes.com/news/latest/showArticle.jhtml;jsessionid=BKMIXSNECXW0OQSNDLSCKHA?articleID=196601610
from above:
In its second
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[EMAIL PROTECTED] (Thompson, Steve , SCI TW) writes:
The PCMs from a prior life all had to license patents from IBM and
others. AMDAHL actually has/had patents that IBM had to as I
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[EMAIL PROTECTED] (Rick Fochtman) writes:
There are similar references for all the newer DASD since that time,
as well. But they're hard to find.
i would be happy to update gcard
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[EMAIL PROTECTED] (Antonio Cecilio) writes:
I don't know if IBM's Tivoli suite does similar tasks??
some recent threads discussing history of TSM (tivoli storage manager);
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[EMAIL PROTECTED] (Phil Payne) writes:
There used to be a rule:
a) If you push it and it doesn't move, it's a mainframe.
b) If you push it and it moves, it's midrange.
c) If you
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[EMAIL PROTECTED] writes:
Due to a little interruption called Viet Nam didn't actually start
twiddling bits until December 73.
in the early 80s, i sponsored a
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[EMAIL PROTECTED] (Tom Marchant) writes:
Macrocode was coded in assembler. It was very similar to millicode on
z/Architecture.
re:
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[EMAIL PROTECTED] (Phil Smith III) writes:
This is fairly OT, but the key graf is:
When the shuttle's flight control software was developed in the
1970s, NASA
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the other viewpoint was that the software was designed as dedicated,
disconnected tabletop operation ... and allowed numerous applications
(games, etc) to take over the whole machine. a
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[EMAIL PROTECTED] (Alan Altmark) writes:
Since we, as a group, are unable to agree that XEDIT is the Best
Mainframe Editor Ever (just bait - don't take it), I
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[EMAIL PROTECTED] (Rick Fochtman) writes:
He may also have been thinking about the Great Chicago Flood of a
few years ago, when several prominent Chicago banks learned the folly
of
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[EMAIL PROTECTED] writes:
Is it necessary to round to a page boundary, or only to a cache line
boundary? (Either is subject to
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Anne Lynn Wheeler [EMAIL PROTECTED] writes:
for some trivia ... one of the people in the following meeting claimed
to have been primary person handling sql/ds
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[EMAIL PROTECTED] (Edward Jaffe) writes:
Write-protected subpools?! No such thing!
I mentioned the CsvRentSp252 DIAG trap earlier in this thread.. What
that
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[EMAIL PROTECTED] (Paul Gilmartin) writes:
Some non-IBM systems can mark segments as I-fetch only and D-fetch
only. Does z/Series have this capability? It instantly traps on
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[EMAIL PROTECTED] (John P Baker) writes:
Reentrancy may be preferred, but it is not always reasonable or even
possible. Each situation must be evaluated on its own merits.
so
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Anne Lynn Wheeler [EMAIL PROTECTED] writes:
A.6 Multiprogramming and Multiprocessing Examples
http://publibz.boulder.ibm.com/cgi-bin/bookmgr_OS390/BOOKS/DZ9ZR003
[EMAIL PROTECTED] (R.S.) writes:
1. DASD mirroring does not prevent you against errors in data. Errors
made by human, software bug, etc.
2. Campus area seems to be too small to talk about serious DR
centre. Too short distance. Numerous disaster types could spread both
locations.
3. There is
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[EMAIL PROTECTED] (Chase, John) writes:
STM R14,R12 will get you 50 or so but STM 14,12,12(13) returns
nothing.
see recent thread posting in comp.arch
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Dan Espen [EMAIL PROTECTED] writes:
Yes, I should have been clearer.
I prefer ISPFs exclude even though xemacs has multiple ways
to hide text, the simpler whole line approach and the
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[EMAIL PROTECTED] (Shmuel Metz , Seymour J.) writes:
8 bits of ECC for 64 bits of data.
At one point the trade press was talking about low cost block oriented
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Anne Lynn Wheeler [EMAIL PROTECTED] writes:
in the early 80s ... big pages were implemented for both VM and MVS.
this didn't change the virtual page size
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[EMAIL PROTECTED] (Ed Gould) writes:
It would be interesting, I would think to have the old timers
compare the code that was used in the old days against what is
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Brian Inglis [EMAIL PROTECTED] writes:
Had to be reduced to 9 pages (36KB) because the 3880/3380 would miss
the start of the next track (RPS miss) on a chained
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[EMAIL PROTECTED] (Tom Schmidt) writes:
Have the presenter review ancient history in the S/360 line -- the 360 line
generally supported differing page sizes (2K
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[EMAIL PROTECTED] (Tom Schmidt) writes:
For zSeries to do it you would either be looking at creative use of MIDAW
to read/write the 1M pages from/to existing
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[EMAIL PROTECTED] (Tom Schmidt) writes:
When I lived in POK I was told that a part of the reason for extended
storage also had to do with its lack of
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[EMAIL PROTECTED] (Patrick O'Keefe) writes:
I hate to argue with furniture (and hate even more when it argues back)
but I'm pretty sure there was a SHARE in eithr L.A. or San Francisco
tony babonas wrote:
Whatever their site is I'm deeply envious of how
comprehensive its contents are. The design must be
such that:
1. It's readily update-able.
2. It's readily search-able, in that a reference to the
1978 version of the ABC Frammis get quoted
rather instantly.
3. Seeming
re:
http://www.garlic.com/~lynn/2006q.html#25 garlic.com
oh, and the e-server magazine article
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Anne Lynn Wheeler [EMAIL PROTECTED] writes:
part of the issue had been that HP had acquired Convex. Convex had
done the scalable Examplar using 64-port sci
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[EMAIL PROTECTED] (Timothy Sipples) writes:
The first thing to say is that Linux is Linux, so for anyone who still
thinks that Linux is somehow emulated on
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[EMAIL PROTECTED] (Phil Payne) writes:
READ what the article says - 7,000 zSeries MIPS have been replaced
by just TWO HP Superdomes. This is not in any way a
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[EMAIL PROTECTED] writes:
I think a lot of it boils back down to what is needed. I'm not a
huge fan of server technology (20,000 chickens pulling a plow) but
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[EMAIL PROTECTED] (Tsai Laurence) writes:
I am confused that the difference between LF NL ? It seems both
will get the printer prints the document on next line . Can anybody
advise
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[EMAIL PROTECTED] writes:
In half-duplex, where, unlike on a 2741, you can't lock the terminal,
if the user wants to type a character while the carriage is
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[EMAIL PROTECTED] (Alan Altmark) writes:
And, more importantly, change. I know of a large multinational IT company
that has a 90-day password change policy,
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[EMAIL PROTECTED] (Staller, Allan) writes:
SAN FRANCISCO (Reuters) - Hackers broke into one of ATT Inc.'s computer
networks and stole credit card data and other personal information
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[EMAIL PROTECTED] (Craig Mullins) writes:
Perhaps this site is helpful in narrowing down what an OS is?
http://www.answers.com/topic/operating-system
re:
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[EMAIL PROTECTED] (Alan Altmark) writes:
LOL. Simplest terms. No kidding there!
I suggest Madnick Donovan's Operating Systems textbook (McGraw-Hill,
1974),
Alan Altmark writes:
It depends on your definition of of operating system. The classical
definition is the chunk of software that manages the real system
resources, allocating them to application programs. That is, the
gatekeeper for access to the CPU, memory, and I/O devices. That would
Anne Lynn Wheeler wrote:
the result was that w/o stringently enforced microkernel standards ... the
micro-kernel tended to become extremely bloated, starting to resemble
the kernels of more traditionally implemented operating systems ...
becoming more and more bloating and much more difficult
Phil Payne wrote:
These days the threat's on the network, and the bearded nutter is sitting safe
in some cave
somewhere. He doesn't necessarily have to get to your system - he can also
attack a system
that your system trusts.
i think there was the vehicle plowing into the lobby of a
re:
http://www.garlic.com/~lynn/2006o.html#68 DASD Response Time (on antique
3390?)
part of this is global cache/lru vis-a-vis local cache/lru. i had been
doing global cache management nearly 40 years ago in cp67 ... at the
time when at least some of the academic literature was focused on
Mickey wrote:
My opinion of VM has been essentially the same as yours. For lack of a
better term, I have always thought of both VM and Rexx as being
elegant.
part of the issue was that CMS (under cp67 and then vm370) was mainstay
personal computer offering of the late 60s and through-out the
Tom Marchant wrote:
Is IBM really giving up on VM? They tryed that once before...
Once? I think the first time was about 1970.
pretty much all during cp67 ... at least tss/360 group was trying to
cancel it ... since the 360/67 (w/virtual memory was supposed to be a
tss/360 machine). i
Mickey wrote:
HONE? Ew I remember I took the Skills Tracking System off
of home and converted it to run on VM at the Atlanta ED cenrter way
back in 1990. What a monumental task that was, but the resultant system
was 2/3 the size of the original and had about 20% more functionality.
re:
http://www.garlic.com/~lynn/2006o.html#49 The Fate of VM - was: Re: Baby
MVS???
http://www.garlic.com/~lynn/2006o.html#51 The Fate of VM - was: Re: Baby
MVS???
http://www.garlic.com/~lynn/2006o.html#52 The Fate of VM - was: Re: Baby
MVS???
email from long ago and far away
To: wheeler
ref:
http://www.garlic.com/~lynn/2006o.html#35 the personal data theft
pandemic continues
http://www.garlic.com/~lynn/2006o.html#38 the personal data theft
pandemic continues
for some additional drift related to being able to harvest personal
information and whether or not it represents a
ref:
http://www.garlic.com/~lynn/2006o.html#14 SEQUENCE NUMBERS
http://www.garlic.com/~lynn/2006o.html#19 Source maintenance was Re:
SEQUENCE NUMBERS
http://www.garlic.com/~lynn/2006o.html#21 Source maintenance was Re:
SEQUENCE NUMBERS
for some additional drift, old history about requiring
[EMAIL PROTECTED] wrote:
Maybe they'll add it to SOX.%-)
recent sox thread:
http://www.garlic.com/~lynn/aadsm25.htm#12 Sarbanes-Oxley is what you
get when you don't do FC
http://www.garlic.com/~lynn/aadsm25.htm#13 Sarbanes-Oxley is what you
get when you don't do FC
Gilbert Saint-Flour wrote:
I keep a list here:
http://gsf-soft.com/Documents/MVS-APPL-DEBUGGING.shtml
for some drift ... in the early 70s, the science center
http://www.garlic.com/~lynn/subtopic.html#545tech
had done a lot of work on performance monitoring and measurement
technologies ...
[EMAIL PROTECTED] (Clark Morris) writes:
How do the various source maintenance packages for other platforms
such as Unix handle the problem. I'm thinking of CVS and the various
Itegrated Development Environments. There are differential upgrades
and other techniques. I am not familiar with
Anne Lynn Wheeler wrote:
Google runs on hundreds of thousands of servers—by one estimate, in
excess of 450,000—racked up in thousands of clusters in dozens of data
centers around the world.
re:
http://www.garlic.com/~lynn/2006n.html#12 Google Architecture
... in somewhat similar vein
Grid
[EMAIL PROTECTED] wrote:
OK. I can't read. The OP asked about MD5 (which is somewhat
deprecated nowadays); I answered about SHA (which is somewhat
less deprecated, so far). C source code for MD5 appears in
RFC 1321.
two years ago, in the middle of a crypto 2004 talk on MD5 attacks ...
McKown, John wrote:
Since we are recalling the past, IIRC there was some CPU designed and
manufactured to natively execute p-code. It didn't really make a very
good showing in the market.
To be totally off topic: I really liked what I read about the Intel iAPX
432. Built from the ground up to
Charles Mills wrote:
Here's a good start:
http://listserv.uark.edu/scripts/wa.exe?A2=ind0509L=ibmvmP=8109
note in the above referenced archive ... it mentions transmission as
reverse inverted
• ALC is transmitted reverse inverted. For example, capital A is
0x31, but it's transmitted as
Rostyslaw J. Lewyckyj [EMAIL PROTECTED] writes:
Well I had exposure, access, to an IBM MVT product called TESTTRAN
which was sort of available on our system with assembler F and , if
I remember correctly, Fortran G, both in batch and TSO. One had to
compile/assemble with the TEST option,
Inside the Google-Plex
http://it.slashdot.org/it/06/07/10/216249.shtml
http://www.baselinemag.com/article2/0,1540,1985040,00.asp
from above:
Google runs on hundreds of thousands of servers—by one estimate, in
excess of 450,000—racked up in thousands of clusters in dozens of data
centers around
Dave Jones wrote:
http://blogs.businessweek.com/the_thread/techbeat/archives/2006/07/not_your_dads_m.html#more
While z/VM isn't explicitly mentioned in the blog entry, I do suspect that
the Linux images the gamers are using are VM hosted. Who was it that first
ran StarTrek on VM or TSO? I guess
Dave Jones wrote:
http://blogs.businessweek.com/the_thread/techbeat/archives/2006/07/not_your_dads_m.html#more
While z/VM isn't explicitly mentioned in the blog entry, I do suspect that
the Linux images the gamers are using are VM hosted. Who was it that first
ran StarTrek on VM or TSO? I guess
Ed Finnell wrote:
There were the 9370's as node machines. We had one for our supercomputer
node for a little while before the big-I got commercial. Then we got a
3090-400e
and darned if it didn't
have four of the buggers inside the 9032...
re:
http://www.garlic.com/~lynn/2006n.html#3
Roy Hewitt wrote:
Prob not if you've got Gbit OSA. Escon CTC type connections existed
before OSA. In the days of 10Mb Ethernet, Escon was was a lot faster,
even with 100Mb it was a viable choice, but can't see why you'd want to
these days..
escon technology had been laying around pok since the
McKown, John wrote:
From what I've been told, that compatability problem is why FS (Future
System) did not take off as a replacement for the S/370. It eventually,
again from what I am told, became the AS/400 (iSeries). The i5/OS that
runs on the iSeries is simply amazing to me. We looked at it
Tom Marchant wrote:
The Amdahl 580 series had the same sort of thing, but they called it
macrocode. It made it easy to implement new instructions. An
interrupt would cause a switch to System state and macrocode would
decide what to do with it. Macrocode, combined with increased
addressability
Jim Mulder wrote:
O(n) - searching a list of n elements
O(n ** 2) - bubble sort of n elements
O(n * log(n)) - heap sort of n elements
there are many cases of searching list of n elements ... which can
result in non-linear overhead increases. this typically happens when
the
Joe Morris wrote:
Anne Lynn Wheeler [EMAIL PROTECTED] writes:
os/360 ... pcp. i don't remember that you could sysgen mvt until
release 12.
That agrees with my recollections. And one other event at release 12
was that the sources were all resequenced...which wasn't really that
much
Jim Mulder wrote:
The architecture scavenged two PTE bits
to allow for 64mbytes of real storage. I don't think the 3033 ever
supported more than 32mbytes, and I am not sure about the 3081, but there
were customers running MVS/370 on the 3090 with 64mbytes of real storage.
re:
Hunkeler Peter , KIUB 34 wrote:
Depends on what release and corresponding name you talk about.
If you go the the roots, both OSs were born in the mid 60s:
OS/360 came out in 1964.
MULTICS came out around 1965, which then became UNICS, then UNIX.
multics started about then. lots of early 545
Shmuel Metz , Seymour J. wrote:
What did they use for a test machine before the 3081 was available?
There was a micro-order on the 3168 that was highly suggestive.
re:
http://www.garlic.com/~lynn/2006m.html#25 Mainframe Limericks
refers to posting
http://www.garlic.com/~lynn/2006m.html#21 The
Shmuel Metz , Seymour J. wrote:
I don't know, but it certainly shocked me, given that there were
already machines with a million words of memory. It didn't take a
crystal ball to forsee growing memory demand.
I wouldn't call that the biggest mistake, however. When the S/360 came
out virtually
[EMAIL PROTECTED] wrote:
UNIX was officially named in 1970. MVS was released in 1974. However
MVS was preceded by MVT which was released in 1964.
os/360 ... pcp. i don't remember that you could sysgen mvt until
release 12.
boeing huntsville had custom modified mvt version 13 with virtual
Shmuel Metz , Seymour J. wrote:
Indeed, but they forgot the need to adjust address constants and
variables when moving things around. They should have given the
software types more say in the design.
os/360 relocatable address constants are a real pain.
tss/360 (the real operating system that
James F Smith wrote:
That doesn't look right, but please consider my bad memory. But wasn't the
track capacity for a 3380 - 47476???
you are talking about the largest formated record w/o key.
if you look at the calculation, a keyless record required adding 12
bytes and rounded up to
Charles Mills wrote:
all disks since dinosaurs roamed the Earth. Heck, it's got the 2311 and
2305. (That should be enough start up another one of those darned mainframe
nostalgia threads.)
i've done qd conversion of the old gcard ios3270 to html.
http://www.garlic.com/~lynn/gcard.html
it has
Tom Schmidt wrote:
Read a little about John Nagle's observations on network performance here:
http://www.port80software.com/200ok/archive/2005/01/31/317.aspx
That particular link hyperlinks to a Microsoft page that gives you a clue
how to change your registery settings to alter the
Paul Gilmartin wrote:
Can you envision running the Internet on SNA?
o 8-character flat namespace?
o No DNS?
Or am I mistaking attributes of VTAM for SNA? (But still, where's SNA's DNS?)
SNA isn't networking ... at least in the sense used by most of the rest
of the world. SNA is quite good
Ed Gould wrote:
I don't think SNA has anything like a DNS (warning my info is old). The
last time I did a 3745 gen you had to hardcode a lot of subareas.
Although I do think they have updated it since then (hope so anyway).
There were some route tables that could get hairy. I had access to the
Ted MacNEIL wrote:
NOT in this case!
The packets are dropped!
They are not re-sent and the app is blown off the air.
It works under SNA; it bellies up under TCP/IP.
Every time! Repeatable!
there were some amount of dirty tricks ... not all that can be repeated
in polite company.
with
Gerhard Adam wrote:
What are you losing? It isn't as if these processors are off playing
solitaire. They're paying the cost of communication to allow more
simultaneous operations for YOUR workload. The primary benefit of this
approach is to reduce the queueing impacts of multiple units of
oh and late breaking topic drift:
Bank admits flaws in chip and PIN security
http://www.dailymail.co.uk/pages/live/articles/news/news.html?in_article_id=385811in_page_id=1770
Millions at risk from chip and Pin
Anne Lynn Wheeler wrote:
as more environments changed from terminal emulation paradigm to
client/server paradigm ... you were starting to have server asymmetric
bandwidth requirements with individual (server) adapter card thruput
equivalent to aggregate lan thruput ... i.e. servers needed
Gilbert Saint-Flour wrote:
The last three examples were sponsored (or developed) by IBM, and many
IBM competitors supported the non-IBM solution precisely because it was
that, non-IBM. In the case of Micro-channel and OS/2, licensing issues
didn't help with PC companies like Compaq and HP.
Marian Gasparovic wrote:
Why are mainframe people so reluctant to change ? I know cases where
mainframe people refused to implement new applications, so they were
implemented on different platform, old applications were removed as
well as mainframe. I witnessed this situation personaly at one
Charles Mills wrote:
Are you sure? That's totally contrary to my impression.
There are three states for the above machine:
- both tasks waiting for I/O
- one task waiting for I/O and the other task computing
- either both tasks computing, or if a single CPU, one computing and the
other
Craddock, Chris wrote:
Pat Helland (formerly with Tandem and MS, now with Amazon) has written
some very lucid and entertaining discussions about how economics are
changing their system design points. He was one of the originators of
the Tandem Non-Stop transaction system and a life-long
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