[DRBD-user] Transfer rates

Helmut Wollmersdorfer helmut.wollmersdorfer at gmx.at
Thu Jun 24 22:22:13 CEST 2004


Daniel Khan schrieb:
> Hello,
> 
> first I want to thank you for all the answers.
> 
> Finally I found out that I simply don't understand the figures :\
> I really have my problems with the bits and bytes.....
> 
> But maybe someone can explain...

One byte has 8 bits
In DRBD
K = 1024
M = 1024 K
G = 1024 M

It is very common, but I wrote it in the man pages as often as possible 
- for avoidance of doubt. KB = 1000 Byte is often used, when KiB = 1024 
is meant.

That was in your first posting:

| sync'ed:  3.8% (305724/317546)M
> sync'ed: 67.5% (103428/317546)M

Compare it. The first value counts down. I know, that this can be 
confusing, because in school we wrote 66% = 200000/300000, and the above 
looks similar.

> 214118/58 = 3691,7 / 60 = 62 Mbytes/sec = 492 Mbits/sec
> and that sounds nice.

> But what does the 30,733 (29,474) K/sec mean then...?

That's the speed, which means ~240 Mbits/sec on the line ...

Helmut Wollmersdorfer





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