Re: Anyone using Freebsd 6.2 ?

> From: Joe Greco <jgrecons.sol.net>
> Date: Thu, 7 Jun 2007 10:33:39 -0500 (CDT)
> To: pvierseloffice.caiw.nl (Patrick van Iersel)
> Cc: diablo-usersopenusenet.org
> Subject: Re: [Diablo-users] Anyone using Freebsd 6.2 ?
> 
>> Hi guys,
>> 
>> Is any of you using Diablo in combination with
Freebsd 6.2?
>> Since we migrated our storage servers from 4 to 6
we're experiencing
>> strange lockups. That is, after a couple of weeks
the load skyrockets
>> and renders the machine unusable.
>> When the diablo process is killed it immediately
settles down. So it
>> seems that the process somehow lost access to a
vital resource, gets
>> in a loop trying and chews up all the cpu power.
>> All the usual tools (netstat, pstat, top etc.)
don't show anything
>> out of the ordinary (the one time we got to it soon
enough to be able to
>> run these).
>> Killing/restarting the process is just a very short
term fix. Usually
>> the same day the problem returns. Only after a
reboot it works flawlessly
>> again for a couple of weeks.
>> 
>> So if anybody has experienced this before and wants
to share his/her
>> info/tips, do tell 
> 
> Well, we've run Diablo a little bit on 6.*/AMD64.  The
problems we were
> noticing were different.  We've currently got a reader
box on 6.*/AMD64
> and with a modest amount of work, it is working pretty
well, with some
> significant caveats.
> 
> Large MTU support seems to be busted.  This is
significant for environments
> where you're trying to move around massive quantities
of data with a small
> number of TCP streams.
> 
> We make extensive use of IPFW.  We've also noticed that
the IP networking
> is fragile as all hell (as in, running "ping"
can panic the box).  We're
> not sure that this is related to the IPFW stuff we're
doing, or if it is
> related to other network tuning, or if it is just
6.2R.
> 
> A variety of other things (I'm missing my notes) will
also panic the box,
> usually stuff that would be
rock-solid-incomprehensible-that-it-would-cause-
> a-panic-under-4.*.
> 
> There are some improvements as well, mostly related to
AMD64.
> 
> Quite frankly, though, we've not been inspired to
commit to 6.* (or 5.*)
> just yet.
> 
> What exactly are you doing with the machine (what is
its role)?

It stores binaries for all groups. We use the hashfeed
function to spread
them over 4 servers.
Feeders and readerboxes are separate servers too. Forgot to
mention that
some of our readers run 6 and haven't shown any problems
yet.

Patrick.

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