Re: Re: Packet filtering / network problem

Re: Re: Packet filtering / network problem

[Scott Taylor]

At 09:56 06/26/03, gerardo juarez-mondragon wrote:
>Scott,
>
>Anyone in the list knows that I *always* code in
>Chipmunk Basic. Nothing else....

That would explain it.  Haven't used any form of BASIC since my first Vic 
20. =P

Server hanging

[Darío Mariani]

Hello:
   I'm administering a server with RedHat 7.3 installed, it runs the 
mail server (pop, imap and webmail), web server, and two or three minor 
services. It has an Athlon running an 1.3 GHz, 512 MB of DDR, and two 
SCSI disk running at 80 MHz in RAID 0 by software. The load average in 
the order of 2 to 3 is quite common.
   The problem is that it hangs more or less once a week and our 
internal discussions are escalating to physical agression in two or 
three days :-). What is puzzling us is that it doesn't tell anything on 
what is happening, but it seems that it stops reading the disk and the 
kernel doesn't panic, as it answers pings and once I was logged in and 
was able to type commands (of course, if I hit enter nothing happens).
   Well, any ideas to avoid the bloodshed (am I spelling it correctly?) 
will be apreciated. Thanks,

			Darío

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Re: Server hanging

[terry white]

on "6-26-2003" "Darío Mariani" writ:

:    The problem is that it hangs more or less once a week

... the first thing i'd do, is open and leave running 'top'.  that might
give some idea of what the system sees just prior to failure.  the idea
is to isolate the problem within the domains of hard, or soft, ware.

    i have to wonder what fs your using, ext2/3.  what kernel,

    personally, scsi devices scare me ...


-- 
... i'm a man, but i can change,
    if i have to , i guess ...

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Re: Server hanging

[Darío Mariani]

terry white wrote:
> on "6-26-2003" "Darío Mariani" writ:
> 
> :    The problem is that it hangs more or less once a week
> 
> ... the first thing i'd do, is open and leave running 'top'.  that might
> give some idea of what the system sees just prior to failure.  the idea
> is to isolate the problem within the domains of hard, or soft, ware.

   Did it, nothing going wild.

>     i have to wonder what fs your using, ext2/3.  what kernel,

   ext3, kernel 2.4.20 release 13.8, but also happened with 2.4.18 rel 3.

> 
>     personally, scsi devices scare me ...
> 

   A few things I should add: Because of a misconfiguration it was 
running the SCSI bus at 40 MHz, when we corrected it and went to 80 MHz 
the hangups dropped, it was hanging twice or more a week. The cables and 
termination were replaced, as part of one of our tests.

   Another thing, the general consensus here is that the problem is that 
we are using RedHat, which I do not agree, after all basically it's all 
the same software. Does anyone know of documentation I can use to 
support or drop my argument, besides a distribution comparison?
   Thanks,
		Darío

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Re: Server hanging

[terry white]

on "6-26-2003" "Darío Mariani" writ:

:    ext3, kernel 2.4.20 release 13.8, but also happened with 2.4.18 rel 3.

    i've read that ext3 problematic.  a search (google busy, so used
altavista) for '"ext3+problem"' a good place to start.


: consensus the problem is RedHat, which I do not agree

   i think you're both correct.  RH likes to 'impose' it flavour on its
distributions.  seems to me, RH defaulted to an ext3 install for 8.0.

    to me, a 'flaky' fs, and 'foreign' hardware, "priced to please" ...



-- 
... i'm a man, but i can change,
    if i have to , i guess ...

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Re: Server hanging

[Stephen Samuel]

Are there any interesting messages in /var/log/messages?

This sounds to me like the symptom one gets when the disk or disk
controller locks up on IDE (yes, I know you're running SCSI, but do
you have an IDE CD in the box, or eomething?)  It still leaves me
wondering if the machine has hardware problems.  How long have you
been allowed to leave the box running to see if the problem goes
away??

One thing I'd suggest is opening a window doing a 'tail -f /var/log/messages'
If you're lucky you'll read complaints while they're still in the cashe and
before the OS tries to write them out to disk.

Darío Mariani wrote:
> Hello:
>   I'm administering a server with RedHat 7.3 installed, it runs the mail 
> server (pop, imap and webmail), web server, and two or three minor 
> services. It has an Athlon running an 1.3 GHz, 512 MB of DDR, and two 
> SCSI disk running at 80 MHz in RAID 0 by software. The load average in 
> the order of 2 to 3 is quite common.
>   The problem is that it hangs more or less once a week and our internal 
> discussions are escalating to physical agression in two or three days 
> :-). What is puzzling us is that it doesn't tell anything on what is 
> happening, but it seems that it stops reading the disk and the kernel 
> doesn't panic, as it answers pings and once I was logged in and was able 
> to type commands (of course, if I hit enter nothing happens).
>   Well, any ideas to avoid the bloodshed (am I spelling it correctly?) 
> will be apreciated. Thanks,


-- 
Stephen Samuel +1(604)876-0426                samuel@bcgreen.com
		   http://www.bcgreen.com/~samuel/
    Powerful committed communication. Transformation touching
        the jewel within each person and bring it to life.


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