[rrd-users] Re: MRTG base --> RRDtool calculation base value

Alex van den Bogaerdt alex at ergens.op.het.net
Wed Aug 2 00:41:37 MEST 2000

Michael Van Camp wrote:

> RRDtool has a default calculation base of 1000, which the manual states is correct for network traffic, but that the base can be changed to 1024 for purposes of graphing memory.  I know a KByte is 1024 Bytes, and that is the unit for traffic, so why would 1000 be correct for traffic?  Is it that 1000 as a unit is correct for traffic in bits/Kilobits/Megabits versus bytes?

There are a few standards in the world.  One of them is that internet
email is limited to 72 characters per line.

Another one is that kilo means 1000.

You say you know that a KByte is 1024 Bytes, I say you're wrong.  The
manual says you're wrong.  Two to one :)

Kilo is always 1000 unless specifically told otherwise.  It is the
computer memory that is the (or: an) exception. To make it even more
complicated, hard disks use kilo==1024 and mega==1000*1024 (as far as
I've encountered anyway).

Search the internet for kibi and you should find an article supporting
both Tobi and me.
I used "+kibi +byte standards institute" to search altavista but this
is just one of the many possibilities.

Again: computer memory is the exception, not network traffic.

> Also, does MRTG use 1000 as a calculation unit when graphing, or 1024?


   Use this option to change the multiplier value for building prefixes.
   Defaultvalue is 1000. This tag is for the special case that 1kB =
   1024B, 1MB = 1024kB and so far.

 kilo[ezwf]: 1024
found in config.txt which is available in the DOCumentation directory
and on http://ee-staff.ethz.ch/~oetiker/webtools/mrtg

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