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

Rene Brun (Rene.Brun@cern.ch)
Fri, 29 May 1998 11:53:08 +0200

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