New subject: benchmark

31 Mar 2000

      Common decency is taking this to private email.. which I am now going to do.
Sorry to bother the rest of this list with crap..
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-----Original Message-----
From:	Jay Orr [SMTP:orrjl@stl.nexen.com]
Sent:	Friday, March 31, 2000 8:48 AM
To:	Paquette, Trevor
Cc:	toasters@mathworks.com
Subject:	RE: benchmark
By restating someone's question as an answer, it is not "asked and
answered". I had put to this forum the question of what does Netapps and
Sun do, since there are many Netapp people on this and many people who use
Sun here.
Your answers have been less then helpful - If you don't know then why did
you reply to the original posting? It was a SIMPLE QUESTION, I didn't ask
for the theory of powers of two, I didn't ask "who should I ask", I didn't
say "how does Trevor feel about this?" I simply posted to this informative
list a simple question of WHAT DOES NETAPP and SUN do in formulating what
they consider MB and GB.
Please, if you have nothing useful to add to a discussion, don't
interject. That's just common decency...
On Fri, 31 Mar 2000, Paquette, Trevor wrote:
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Oh brother..
asked and answered..
"Each vendor will have to be asked what method they use in the real
world."
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The answer is "ask them.."
Subject Closed.
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-----Original Message-----
From:	Jay Orr [SMTP:orrjl@stl.nexen.com]
Sent:	Friday, March 31, 2000 7:30 AM
To:	Paquette, Trevor
Cc:	Karl Swartz; toasters@mathworks.com
Subject:	RE: benchmark
Yes, and THAT WAS MY ORIGINAL QUESTION THAT YOU RESPONDED TO  - what
do
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Netapps and Sun do?
On Thu, 30 Mar 2000, Paquette, Trevor wrote:
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Each vendor either sticks with powers of 2 (as they should) or they
round
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it.
Each vendor will have to be asked what method they use in the real
world.
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Yes, we all know the theory, but I'm talking real world. As the
thread reads, some vendors use 1000 KB = 1MB, while some don't. I
am
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asking what is implemented. Do the majority of the unix vendors
adhere
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to
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the proper base 2 theory of metrics or do they use base 10 combos
(i.e. the 1GB = 1000 MB)?
On Thu, 30 Mar 2000, Paquette, Trevor wrote:
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Here we go..
A bit is the smallest unit of data in a computer; has a single
binary
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value
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of either 0 or 1
A byte is a unit of information that is eight bits long. (half a
byte,
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or 4
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bits is called a nibble)
Computer storage is measured in byte multiples; which are based
on
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powers of
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Because humans deal mainly with the decimal system, the
resulting
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number
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is
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usually 'rounded off'
for humans to better comprehend.
1 Kbyte    = 1024  bytes = 2^10 bytes =
1,024
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bytes
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1 Megabyte = 1024 Kbytes = 2^20 bytes =
1,048,576
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bytes
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1 Gigabyte = 1024 Mbytes = 2^30 bytes =
1,073,741,824
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bytes
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1 Terabyte = 1024 Gbytes = 2^40 bytes =
1,099,511,627,776
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bytes
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1 Petabyte = 1024 Tbytes = 2^50 bytes =
1,125,899,906,842,624
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bytes
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1 Exabyte  = 1024 Pbytes = 2^60 bytes =
1,152,921,504,606,846,976
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bytes
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= approx. 1 billion GB
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> Humm... Fun.. Do you know off hand how Solaris and netapp
defines
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a MB
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or
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> GB? In moving around files I started thinking about this,
since
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depending
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> on what tool you use you get file sizes in "bytes" "kbytes"
"MB"
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or
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"GB"
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> (a la gnu df, solaris df, etc...)
> 
> On Wed, 29 Mar 2000, Karl Swartz wrote:
> 
> > > Uh, if I can ask a simple (stupid?) question - I was
looking
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at
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the
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> source
> > > code for postmark and noticed this :
> > > 
> > > #define KILOBYTE 1024
> > > #define MEGABYTE (1000*KILOBYTE)
> > > 
> > > Isn't a megabite 1024*1024?
> > 
> > It depends on who you ask.  Long ago, disk vendors decided
that
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they
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> > could make their disks look bigger if they defined MB to be
2000
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> > sectors (assuming 512 byte sectors, or 8000 sectors for 128
byte
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> > sectors), and GB became 1000 MB.  Of course they also talked
about
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> > unformatted capacity to further inflate the size over
reality.
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> > 
> > In a similar vein, telco people talk about 1K = 1000.  The
64K
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B-
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> > channel in an ISDN line is 64000 bits per second, not 65536.
> > 
> > I'm not sure about networking, but I think FDDI and
100base-T
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both
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> > have a data rate of 100 * 10^6 bits/second, not 100 * 2^20.
(Not to
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be
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> > confused with the signalling rate, which as I recall is 125

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10^6
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for
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> > FDDI with some flavor of 4/5 encoding, and possibly
something
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similar
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> > for 100base-T.)
> > 
> > What's right for Postmark?  Good question.  It looks like
Jeff
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picked
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> > the standard for disk sizes, but it's not clear that's the
standard
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> > most applicable to this case.  Aren't standards wonderful?
:-)
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> > 
> > --
> > Karl Swartz		Network Appliance Engineering
> > Work: kls@netapp.com	http://www.netapp.com/
> > Home: kls@chicago.com	http://www.chicago.com/~kls/
> > 
> 
> -----------
> Jay Orr  
> Systems Administrator
> Fujitsu  Nexion Inc.
> St. Louis, MO

Jay Orr  
Systems Administrator
Fujitsu  Nexion Inc.
St. Louis, MO