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Re: cfenvd and histograms?


From: Mark . Burgess
Subject: Re: cfenvd and histograms?
Date: Fri, 20 Aug 2004 09:14:40 +0200 (MEST)

This starts keeping stats over the probability distribiution of
fluctuations about the mean value over all times of day. In order
to calculate this, cfenvd has to know its mean values reliably
so it waits until the data are old enough before writing anything
there. When you run cfenvgraph later, you will get a plot
of what the behaviour of the host looks like. e.g. number of
users is often approximately Gaussian about the mean, but
we traffic is usually a skew distributrion.

M

On 19 Aug, Alf Wachsmann wrote:
> We are playing a little with cfenvd (latest snapshot on Linux RHEL3)
> and are trying to figure out what the "--histograms" option does.
> 
> When starting "cfenvd -H" it complains that /var/cfengine/state/histograms
> doesn't exist, so we've created it by hand with the right permissions.
> 
> After running cfenvd for a day the file is still empty and we don't see
> any "Unable to save histograms" messages in syslog either.
> 
> Many thanks,
>                  Alf.
> 
> -----------------------------------------------------------------------
>   Alf Wachsmann                       | e-mail: alfw@slac.stanford.edu
>   SLAC Computing Service              | Phone:  +1-650-926-4802
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> -----------------------------------------------------------------------
>                 http://www.slac.stanford.edu/~alfw (PGP)
> -----------------------------------------------------------------------
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Work: +47 22453272            Email:  Mark.Burgess@iu.hio.no
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