[ENBD] (no subject)

[HUDZIA Bertrand]

On Thu, 11 Apr 2002 13:01:26 +0200 (MET DST)
"Peter T. Breuer" <ptb@it.uc3m.es> wrote:

Ok , i made twin clean install on both pc.

They both compiled well enbd ;)

I got Spectrum . But as i may have told u , i got it also at the begining of the other .

With standart seting, it have crashed.

> 25/80 is the important thing. Change to 10/90 and see if it helps.
> (makes buffers start to flush earlier, and makes the point later at
> which the system starts to flush synchronously instead of asynchronously).
> 

The client :
	[root@bd2 root]# cat /proc/sys/vm/bdflush 
	10      0       0       0       500     3000    90      0       0

With this setting and the merge_resuest=30 , the crash test ran beautifully ;)
Doesn't crashed ;)

I'll make the iozone test and the nbd-test (fullsize) tonight.

> > The traffic was not very hudge, it was jumping for 0 to 800K. I don't
> > have the Spectrum value here , duno why .
> 
> It's very peculiar. It always used to appear here! There is definitely
> something wrong, because things ought not to be like that, but I don't
> know what .. what is your compiler?
> 

First try at enbd was compiled with :
	[root@bd3 root]# gcc -v
	Reading specs from /usr/lib/gcc-lib/i386-redhat-linux/2.96/specs
	gcc version 2.96 20000731 (Red Hat Linux 7.1 2.96-98)

Second try (working with option , passing test tonight :=) :
	[root@bd1 root]# gcc -v
	Reading specs from /usr/lib/gcc-lib/i386-redhat-linux/2.96/specs
	gcc version 2.96 20000731 (Red Hat Linux 7.1 2.96-98)

Well , they are same ;)

> 
> I've never tried iozone. I'd prefer it if you could reproduce the
> problem with nbd-test first. If it turns out to be peculiar to iozone,
> then I'd begin to suspect an ioctl.
> 

The crash test i made was fist with iozone, but i made it crash faster with a
kernel detar // a make of the kernel -j 10.

Ok , so i'll wait for the result tomorow morning and tell u ;)


		Bd.