Oops. Went back & read; this was not a u2 system. Pick did some pretty
horrific things at various times around file sizing; used to be you had to
do a restore from tape to resize, after editing that field 13. There was
even a brief period where it would write a period into each byte in every
unused frame (After starting the frame with something like "Advanced Pick"),
which would take up most of the next day or longer to complete.
In this case... still no value in making the modulus larger than the number
of items. Plenty of value in converting to u2, though... ;)
"Our greatest duty in this life is to help others. And please, if you can't
help them, could you at least not hurt them?" - H.H. the Dalai Lama
"When buying & selling are controlled by legislation, the first thing to be
bought & sold are the legislators" - P.J. O'Rourke
Dan Fitzgerald
From: "Mark Johnson" <[EMAIL PROTECTED]>
Reply-To: [email protected]
To: <[email protected]>
Subject: Re: [U2] Prime number file modulos
Date: Fri, 2 Sep 2005 17:40:48 -0400
I found the resize program and all it did was place the new mod in 013 of
the DL/ID. Its only proof was that it was numeric and not 'even'. Pretty
pathetic.
Thanks
Mark Johnson
----- Original Message -----
From: "Allen E. Elwood" <[EMAIL PROTECTED]>
To: <[email protected]>
Sent: Friday, September 02, 2005 4:20 PM
Subject: RE: [U2] Prime number file modulos
> >P.S. Could "SLOW" stand for System Loves Overflow Workspace?
>
> Since someone lacked the ability to calculate a prime number, maybe its
>
> Serious Lack Of Writhmatic
>
> which fails the English test as well ;)
>
> -----Original Message-----
> From: [EMAIL PROTECTED]
> [mailto:[EMAIL PROTECTED] Behalf Of Mark Johnson
> Sent: Friday, September 02, 2005 05:53
> To: [email protected]
> Subject: Re: [U2] Prime number file modulos
>
>
> I just got a copy of the stat report and found over 100 files who's mods
are
> either obviously not prime, ie 1000 or someone's stupid assumption that
1001
> is prime. Plus many of these files are 200%-500% under mod'd (is that a
> word?). Plus it's the second slowest client of mine (my microdatas are
> currently the slowest, but sized properly).
>
> I'm checking to see if there's an erroneous resize program or an
erroneous
> resize programmer. Not truly understood back in the day (circa 1978),
but
> prime numbers were stringently insisted when learning MV101.
>
> Thanks.
> Mark Johnson
>
> P.S. Could "SLOW" stand for System Loves Overflow Workspace?
> ----- Original Message -----
> From: <[EMAIL PROTECTED]>
> To: <[email protected]>
> Sent: Tuesday, August 30, 2005 5:05 PM
> Subject: Re: [U2] Prime number file modulos
>
>
> > The funniest or most gruesome file tuning that I've seen was
> > a few years ago, at a site that I won't name, who had a master
> > file with a modulo of exactly 100 and where 99% of the ids
> > were numbers ending in 00.
> >
> > Definitely not tuned by "FAST" - - maybe they'd used "SLOW"?
> >
> > Answering Mark's question, "did it really matter to be prime?"
> > . . . No, but if your group distribution is extremely lumpy
> > or spiky, then, as Henry Eggers once said, your file is walking
> > around with a sign taped to the back of its shirt, saying,
> > "Hit Me!".
> >
> > --
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> > exempt from disclosure under applicable law.
> > Any review, re-transmission, dissemination or other use of,
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> > If you received this in error, please contact the sender
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> >
> >
> >
> > -----Mark Johnson wrote: -----
> > To: <[email protected]>
> > From: "Mark Johnson" <[EMAIL PROTECTED]>
> > Sent by: [EMAIL PROTECTED]
> > Date: 08/30/2005 09:16AM
> > Subject: [U2] Prime number file modulos
> >
> > A little non-U2 but I'm sure still answerable by many experienced MV
> > persons.
> >
> > One client (AP-Pro, Native) reported to me a bunch of GFE's. Upon
further
> > investigation, all of the involved data files had non-prime modulos.
> >
> > This begs the question. Did it really matter to be prime. I understand
the
> > concept of prime numbers and the many forms of hashing so let's not
> deviate
> > into a hashing thread debate. I'm just interested to learn first-hand
> > observations on native systems with non-prime file modulos.
> >
> > Thanks in advance.
> > Mark Johnson
> > -------
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