Re: [opensuse] Beagle Configuration

On Saturday 31 March 2007 10:04, Joe Shaw wrote:
Hi,

On 3/31/07, Rajko M. <rmatov101@xxxxxxxxxxx> wrote:
It is actually the I/O that is slow and faster CPU doesn't help much.
Problem is when 2 or more programs are trying to access HD at the same
time, and that happens on the first boot.

Indeed. As CPUs get faster, the amount of time applications spend
doing IO approaches 100%.

Yes.
To load 1 GB from HD with 50 MB/s is 20s, after that it goes fast, but if
there is 2000 files in that 1 GB, which can easily happen, the speed is down.

I was wondering why is Knoppix booting faster from CD than from HD, but before
above sentence I never tried to think about I/O impact on boot process.

Maybe we ^H^H^H :-) you, developers, can consider booting the image in the
similar way Knoppix does. Suspend to disk should be the right way, but right
now it doesn't work here. I suspect that graphic (nVidia) initialization
fails.

Beagle isn't started at boot though; the cron job is started 15
minutes after the first boot, and the per-user daemon is started
something like 2 or 3 minutes after login (to avoid slowing it down).
So slow boot times (which I agree have gotten worse) have nothing to
do with Beagle.

I mentioned that a lot of negative opinions picked up around kept me from
giving a test ride to Beagle.

There is some data and analysis on the boot process here:

http://en.opensuse.org/Boot_time

In fact, in there I say that a parallel boot process doesn't help much
(and in fact may even hurt us) because most of the time is spend doing
concurrent IO.

After this discussion, it seems clear that concurrent access to HD is bad.
I'll try to see is it possible to switch to old style in 10.2 and post result
on above page.

--
Regards, Rajko.
http://en.opensuse.org/Portal
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