Mersenne: Linux VFAT question

1999-06-27 Thread George Woltman

Hi,

Jan Scheller is having a problem (see below).  Are there any Linux users that
can provide help?  Please include Jan in your reply as Jan is not
subscribed to this mailing list.

I've already recommended the "poor man's" solution of
having mprime not write to disk every 30 minutes.

Best regards
George

snip

But the fact is that the performance of my mounted hdd win98 (vfat)
partition is very low. All my normal linux (ext2) partitions work with
normal performance. If I execute a command like `ls -l /Win98` (/Win98
is the path of may win98 (vfat) partition) it takes more than a second
to get the result. The second points is, that the swapping seems to be
slower than without running mprime. I run mprime every time at the
lowest priority. 

Is there possibility to rise the performance of my vfat partition while
running mprime?


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Re: Mersenne: Linux VFAT question

1999-06-27 Thread Pierre Abbat

 But the fact is that the performance of my mounted hdd win98 (vfat)
 partition is very low. All my normal linux (ext2) partitions work with
 normal performance. If I execute a command like `ls -l /Win98` (/Win98
 is the path of may win98 (vfat) partition) it takes more than a second
 to get the result. The second points is, that the swapping seems to be
 slower than without running mprime. I run mprime every time at the
 lowest priority. 

cd to various directories, then type vdir|wc -l in each. This tells you how
many files the directory has. The more files, the longer it takes to sort them.
vdir -U lists the directory without sorting it, which is a little faster.

mprime just writes once every 30 minutes, so whether it's running in the
Windows drive or the Linux drive is inconsequential. As to the swapping, the
swap daemon runs at 12 naughty, so I don't see why mprime at 20 nice would
bother it at all.

phma

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Re: Mersenne: Linux VFAT question

1999-06-27 Thread Steinar H. Gunderson

On Sun, Jun 27, 1999 at 09:18:13AM -0400, George Woltman wrote:
If I execute a command like `ls -l /Win98` (/Win98
is the path of may win98 (vfat) partition) it takes more than a second
to get the result. The second points is, that the swapping seems to be
slower than without running mprime. I run mprime every time at the
lowest priority.

Hmmm... I'm not completely sure if I understand the problem. Do you mean
that your vfat access is slower in general when running mprime? Or just
when you just have started mprime, and it's reading the p-file from
disk? And what is this `swapping' you're talking about, is that disk
access?

(A simple but ugly solution would be storing all your mprime files
(INI-files, p/q files, etc.) on an ext2 partition, and copy them
to/from the vfat partition automatically on boot and reboot. (How
you do this depends a bit on your distribution.) Of course, if you
don't use Windows very much, you could drop `Windows support' totally.)

/* Steinar */

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