perfsonar development work

["Jeff W. Boote" <>]

There are far more people in the perfSONAR community than were at  
Zagreb.

It would be good to explain what it is you are doing, and why for the  
full community.

jeff

On Apr 30, 2008, at 1:09 AM, Jochen Reinwand wrote:

> We already discussed this in Zagreb and I don't see the need to  
> start the
> discussion again. We agreed with Martin that this is the best way to  
> proceed.
>
> Jochen
>
> On Tuesday 29 April 2008 17:12, Joe Metzger wrote:
> > Jochen,
> > I realize that you need to work out a solution that will allow you to
> > meet your commitments.  But I am concerned that this is a significant
> > deviation from the current perfSONAR standards in both the protocol
> > used for the transport, and the format of the data exchanged.
> >
> > Is it necessary to change both the transport protocol (rsync), and  
> > the
> > data storage format (Compressed perl Storables) to achieve your
> > performance
> > objectives?
> >
> > Do you think we need to incorporate "external" transport and/or data
> > formats
> > into the perfSONAR standards?
> >
> > Does this data exchange need to be considered part of the perfSONAR
> > framework? Or, could
> > it be considered as a 'backed' interface used by a custom measurement
> > system (hades)
> > to push data into a perfSONAR Measurement Archive. (Similar to the
> > way several
> > people are using rsync to update the rrd files served by the rrdma.)
> >
> >
> > --Joe
> >
> > On Apr 29, 2008, at 9:48 AM, Jochen Reinwand wrote:
> > > On Tuesday 29 April 2008 16:27, maxim wrote:
> > > > and what "perl binary format" means ?  serialized perl data
> > > > structures with
> > > > Storable ?
> > >
> > > Our data on the central server is stored in a directory per day and
> > > in there
> > > one file for each measurement. The file is created this way:
> > >
> > > use Storable qw(nstore);
> > > use Compress::Zlib;
> > > my $frozen = nfreeze($ref);
> > > my $compressed = compress($frozen);
> > > nstore \$compressed, $file;
> > >
> > > I set up an rsync daemon serving our data directory. Via perfSONAR
> > > it will be
> > > possible to get the URL for the corresponding file.
> > >
> > > Jochen
> > >
> > > --
> > > Jochen Reinwand, DFN-Labor
> > > Friedrich-Alexander-Universität Erlangen-Nürnberg
> > > Regionales RechenZentrum Erlangen (RRZE)
> > > Martensstraße 1, 91058 Erlangen, Germany
> > > Tel. +49 9131 85-28689, -28800, Fax +49 9131 302941
> > >
> > > www.win-labor.dfn.de
>
> --
> Jochen Reinwand, DFN-Labor
> Friedrich-Alexander-Universität Erlangen-Nürnberg
> Regionales RechenZentrum Erlangen (RRZE)
> Martensstraße 1, 91058 Erlangen, Germany
> Tel. +49 9131 85-28689, -28800, Fax +49 9131 302941
>
> www.win-labor.dfn.de