Re: accessing memory map files via a rootd/apache Server?

From: Rene Brun (Rene.Brun@cern.ch)
Date: Fri May 29 1998 - 11:53:08 MEST


HANS WENZEL, FNAL: 630 840 8240 HOME: (630) 393 1756 OR 393 1873 wrote:
> 
>                                                              FNAL, 28-MAY-1998
> 
>     Dear rooters
> 
> I am interested in remotely accessing a file containing histograms while it is
> being updated in memory. pretty much like one can access static root files
> with rootd or apache as described in the overview on pages 58 to 60.
> basically i would like to expand the examples hcons.C and hprod.C in the
> tutorials area so that hcons runs remotely on a different machine.
> so it would be nice if one could do something like this
> 
> TMapFile *f = TMapFile::Create("root://b0rv04.fnal.gov:
> 5151/usr/people/wenzel/bin/root/myroot/hsimple.map")
> 
> Is there any way to implement such a feature?
> 
> thanks
>
 
Hans,
I suggest you look in the hclient and hserv examples in the tutorial
section:
  http://root.cern.ch/root/html/examples/hserv.C.html
  http://root.cern.ch/root/html/examples/hclient.C.html
You can make a variant of hserv using internally TMapfile..

Rene Brun
> 
> P.S. root is a great tool and i really appreciate the prompt answers

Thanks



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