[geeks] [hubert at feyrer.de: Re: DVD based backup software]

[Charles Shannon Hendrix]

Sat, 02 Sep 2006 @ 01:53 +0200, Sebastian Jaenicke said:

> [about g4u sucking]
> > It might run faster with something like Larry McVoy's dd, or another
> > variation which reads and write more intelligently.
> 
> I'd like to hear more about that dd implementation that 'reads and writes 
> more intelligently'. What is 'intelligent'?

There are dd clones and programs which do the same basic thing, and they
run faster because they do better buffering and run reading and writing
in parallel.  Among other things.

g4u was so slow in some cases across seperate I/O paths that it was
worth buying Ghost just for a few copies to save time, possibly days
of time.

I thought about the read/write I/O being part of the problem because
years ago I wrote some software that depended on dd.  It worked but was
very slow, even when the I/O paths were to/from different devices.

I replaced dd with another program that used several processes for read,
write, and buffering, and got a huge increase in speed, sometimes
several times faster.

Just a thought.


-- 
shannon "AT" widomaker.com -- ["There is no such thing as security.  Life
is either bold adventure, or it is nothing -- Helen Keller"]