Re: Document x Byte Hit Ratio

Thanks for the reply.

Is there any way to track down misbehaved clients?
I guess a TCP_CLIENT_ABORT on the result code would do.
Maybe something reported on the HTTP status code...
I feel that in backbone caches it's very important to figure
out why there are more bytes coming in than going out,
if possible, per client or aggregated in network/mask.
Is there any way to find out something similar at the
application level?

thanks,
--jp

--
FCCN - Fundação para a Computação Científica Nacional - Tel: +351-218440100
On Wed, 19 Jul 2000, David Luyer wrote:
> 
> Duane wrote:
> 
> > > Hello there,
> > > 
> > > How is it possible for Byte-Hit-Ratio to be <0 ?
> > 
> >   12.31.  Why do I see negative byte hit ratio?
> > 
> >   Byte hit ratio is calculated a bit differently than Request hit ratio.
> >   Squid counts the number of bytes read from the network on the server-
> >   side, and the number of bytes written to the client-side.  The byte
> >   hit ratio is calculated as
> > 
> >           (client_bytes - server_bytes) / client_bytes
> > 
> >   If server_bytes is greater than client_bytes, you end up with a nega-
> >   tive value.
> > 
> >   The server_bytes may be greater than client_bytes for a number of
> >   reasons, including:
> > 
> >   o  Cache Digests and other internally generated requests.  Cache
> >      Digest messages are quite large.  They are counted in the
> >      server_bytes, but since they are consumed internally, they do not
> >      count in client_bytes.
> > 
> >   o  User-aborted requests.  If your quick_abort setting allows it,
> >      Squid sometimes continues to fetch aborted requests from the
> >      server-side, without sending any data to the client-side.
>   *    Even if not, especially if you use delay pools and are very
>   *    strict on user bandwidth, when a client aborts a connection you
>   *    have most likely received data for that user which you never got
>   *    to send to them.
> 
> Davied.
> -- 
> ----------------------------------------------
> David Luyer
> Senior Network Engineer
> Pacific Internet (Aust) Pty Ltd
> Phone:  +61 3 9674 7525
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>