perfsonar development work

["Matthias K. Hamm" <>]

Hi all,

we - Mark Yampolskiy and me - are also developing an perfSONAR enabled 
service using PERL. Our End-to-End Monitoring System for Layer2 
measurements currently consists of a E2E MP to be installed by the NRENs 
and a central correlating tool (for more info, see 
http://wiki.perfsonar.net/jra1-wiki/index.php/PerfSONAR_support_for_E2E_Link_Monitoring)

We use SOAP::Lite and XML::DOM. However, we are not happy at all with 
this choice and would like to have them replaced eventually.

Perhaps we - all participants who use or provide perfSONAR services with 
PERL - could collaborate in some way to avoid having the same 
developments twice or three times (as now). What about having a VC or 
perhaps even face-to-face meeting ?

Cheers,

Matthias

Yee-Ting Li schrieb:
> Hey Jochen,
>
> thanks for the reply.
>
> we have a local topology database with some rrd performance 
> information that we would like to front as a perfsonar service. 
> basically, it will involve remapping that information into nmwg afaict.
>
> i was interested in porting the java libraries mainly because i felt 
> it was a good place to start; the structure of the objects appears to 
> make a lot of sense. i've looked through your code, and i like the 
> simplicity of the NMWG.pm class, and the way in which it is more 
> perl-like.
>
> i was thinking that it may be nice to implement the java api in perl; 
> but utilise wrappers around the api to allow more perl like data 
> structures to be implemented. that way, it would be relatively easy to 
> keep up to date with the current nmwg spec (as the java classes are 
> typically very up to date), whilst at the same time being able update 
> services to use the latest nmwg versions with almost no effort.
>
> i've started a little in this task; the main problems at the moment 
> appear to be the need for a namespace class in perl.
>
> does your hades nmwg classes support meta data chaining etc?
>
> thanks!
>
> Yee.
>
>
> On 15 Jan 2007, at 04:48, Jochen Reinwand wrote:
>
> > Hi,
> >
> > Our perfSONAR services (Hades MA and BWCTL MP) are written in Perl. 
> > We did not
> > try to make something similar to the Java implementation, since we 
> > decided to
> > do it "the Perl way". We used mainly XML::LibXML for XML handling and
> > SOAP::Lite for the SOAP stuff. But the later one will be replaced by 
> > directly
> > using HTTP modules, because SOAP::Lite is (at the moment) not the right
> > module for perfSONAR.
> > Our code was made having some sort of perfSONAR Perl module in mind, 
> > but since
> > our services are by now the only services using Perl, we haven't put 
> > much
> > effort into really supplying such a module. We also do not have a really
> > fixed API, since we always have to implement new feature, that need 
> > to be
> > compatible with the Java stuff. But since a few things have to be 
> > added and
> > reworked we might put some more work in this module in the next few 
> > weeks...
> >
> > You can find our code in the Subversion repository here:
> > http://tod.rrze.uni-erlangen.de/hades/trunk/
> >
> > http://tod.rrze.uni-erlangen.de/hades/trunk/framework/bin/perfsonar.pl
> > is our daemon providing all perfSONAR services. It uses modules in
> > http://tod.rrze.uni-erlangen.de/hades/trunk/framework/lib/
> >
> > I hope this helps you a little with your decision...
> > BTW: What exactly are you planning to do? Implementing a new service 
> > in Perl?
> >
> > regards,
> > Jochen
> >
> > On Wednesday 10 January 2007 22:25, Yee-Ting Li wrote:
> > > Hi,
> > >
> > > so i'm currently looking into creating nmwg spec xml from a personar
> > > service written in perl. rather than generating my own xml classes
> > > which will probably break very easily, i had the idea of porting the
> > > existing java libraries over to perl.
> > >
> > > so...
> > >
> > > 1) is this a good idea? i'm thinking reuse here for others. i plan on
> > > keeping as much of the java api as possible within perl.
> > >
> > > 2) how much of a job is it to do this? i figured once i get the base
> > > classes ported, the rest should be relatively simple; certainly i
> > > don't plan on porting /everything/ on the tree just yet.
> > >
> > > 3) how would we keep the two trunks (java/perl) in sync?
> > >
> > > 4) do any of the java libraries (like the java namespace classes,
> > > org.w3c.dom.Document, Content Handler etc) have equivalent packages
> > > in perl which will make my life simpler?
> > >
> > > 5) are there any tools to automate as much of this as possible?
> > >
> > > 6) am i crazy to do this?
> > >
> > > Yee.
> >
> > --Jochen Reinwand                                 Tel: +49 9131 852-8689
> > DFN Labor
> >
> > Regionales Rechenzentrum Erlangen
> > Martensstrasse 1
> > 91058 Erlangen
> >
> > email:          


--

Matthias Hamm

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