[Zope] Zope 2.7 FTP Bandwidth Limiter?

Chris McDonough chrism at plope.com
Thu Feb 26 12:40:10 EST 2004


The 100% CPU spike is likely the cause of the slow performance.  I think
a reasonable strategy might be to turn on profiling in Zope 2.7 (see
zope.conf profile-publisher? key, and Control_Panel -> Debug) to see
what falls out of that.  I'm sure there's a lot of information about
this if you google for "zope profiling".

On Thu, 2004-02-26 at 08:26, Bobb wrote:
> Which OS / processor / memory are you running Edward ? Which network type ?
> Ethernet/speed, etc.
> Does the machine have an non-zope ftp server on it?
> If you use that do you get the same results?
> I find the 100% cpu spike even stranger than slow performance... (but that's
> just me ;) )
> 
> ----- Original Message -----
> From: "Edward Pollard" <pollej at uleth.ca>
> To: "Bobb" <rawbobb at hotmail.com>
> Cc: <zope at zope.org>
> Sent: Wednesday, February 25, 2004 3:21 PM
> Subject: Re: [Zope] Zope 2.7 FTP Bandwidth Limiter?
> 
> 
> Indeed we still only get 10k/sec via ftp to localhost.
> 
> It is worth noting that FTP upload is full-speed. Also noteworthy is
> that the CPU on this box is going to 100% when I download via FTP (45%
> user/55% system).
> 
> This problem is exhibited, pretty much identically, in Zope 2.6.4 and
> 2.7.
> 
> Zope 2.6.2 seems to have critical bugs in its FTP implementation, which
> means I needed to be off of it yesterday.
> 
> • Dieter does not have this problem in 2.7, which may suggest that the
> problem is not Zope.
> 
> • We are running different versions of Python (2.1 for Zope 2.6.4,
> 2.3.3 for Zope 2.7) for each of these servers, which may suggests it
> isn't a Python-related problem, unless there is something we did wrong
> twice. (And our 2.6.2 is running fine on Python 2.1, although it is a
> separate install of it than the one 2.6.4 uses).
> 
> • Everything else runs at a proper transfer rate on this machine - and
> executing the 2.6.4 and 2.7 installs on the machine where we run 2.6.2
> as a process successfully yields the same results - which may suggest
> that the hardware is fine.
> 
> Conclusion: I got nothing.
> 
> Does anyone have any thoughts at all on this subject?
> 
> Ed
> 
> 
> On Feb 22, 2004, at 11:51 AM, Bobb wrote:
> 
> > I'm curious what about ftp'ing locally 127.0.0.1:ftpport ?
> > still 10k/sec?
> >
> > ----- Original Message -----
> > From: "Edward Pollard" <pollej at uleth.ca>
> > To: <zope at zope.org>
> > Sent: Saturday, February 21, 2004 4:20 PM
> > Subject: [Zope] Zope 2.7 FTP Bandwidth Limiter?
> >
> >
> >> We're experimenting with Zope 2.7, and are currently unable to get FTP
> >> transfers to go any faster that 10k/sec. This seems to be some sort of
> >> arbitrary limit, as we have plenty of bandwidth and horsepower
> >> available. Indeed, we can pretty much make as many FTP sessions as we
> >> want simultaneously, they just all go at 10k/sec.
> >>
> >> Was there some sort of limiter or throttle introduced somewhere along
> >> the lines that I am unaware of?
> >>
> >> ---
> >> Edward J. Pollard, B.Sc
> >> Webmaster, University of Lethbridge
> >>
> >>
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> 
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