[gentoo-dev] Re: rsync speed and space taken

[Duncan]

Allen Parker posted <9f27901604101016497d40b0a@××××××××××.com>, excerpted
below,  on Sun, 10 Oct 2004 15:49:34 -0800:

> I don't need my emerge sync's taking 45 minutes on average on a 5Mbit
> line in france... *45 minutes*

If your emerge syncs are taking *THAT* long, on a 5Mbit line, somethings
TERRIBLY WRONG!  I have a cable modem here (Phoenix, AZ, US), capped @
4Mbps, and my syncs take perhaps a couple minutes, short enough time that
I usually do it interactively -- type in the command, and watch it work,
then do an emerge -auD world to see what is there to change, after that.

FWIW, I note that much of the time, it's actually not downloading
anything, only checking stuff locally (presumably doing local md5 sums
and matching against the new ones in the initially d/led file to see if
they've changed), in the background.  Only the initial file d/l, and the
two-line entries with the percent complete and etc on the second line, are
actually transferred.  The rest of the time is spent locally, generally
CPU bound (single thread/CPU only) That being the case, I suspect the
reason it takes you 45 minutes and me substantially less than five, may be
due to local CPU processing power. I'm running a dual AMD64 Opteron (1 gig
memory, swap entirely kernel disabled so the kernel doesn't bother with it
at all) here, altho as I mentioned, portage/python doesn't appear to be
multi-threaded, so it only tops off one CPU.  If you are running something
less powerful, that'd probably explain your longer sync times even with a
fatter internet pipe.

..  About 3 and a half minutes.  I just timed it.

-- 
Duncan - List replies preferred.   No HTML msgs.
"They that can give up essential liberty to obtain a little
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