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Re: [pS-dev] what services should register into LS [was:Re: BWCTL,Hades and Lookup service]


Chronological Thread 
  • From: Nina Jeliazkova <>
  • To: "Jeff W. Boote" <>
  • Cc: Nicolas Simar <>, Verena Venus <>, WiN-Labor <>, Prodromos Gerakios <>, "" <>
  • Subject: Re: [pS-dev] what services should register into LS [was:Re: BWCTL,Hades and Lookup service]
  • Date: Mon, 02 Jun 2008 19:31:02 +0300

Jeff,

Jeff W. Boote wrote:
Hi Nina,

On Jun 2, 2008, at 7:51 AM, Nina Jeliazkova wrote:

Hello all,

We are discussing what information services should register into LS, besides service URL. Recently, Jason advised to recognize service type by eventtypes, rather than by arbitrary strings like one found in "servicetype" parameter.

This seems to work fine with RRD MA services, but not all other services submit information about eventtypes when registering to LS. Is there a guidance what schema should be supported in this case?

Could you be more specific? Which services are not registering eventTypes? This disrupts the dLS (and gLS) summarization model as well...
So far I am aware of flowsa MA, developed at Surfnet , and BWCTL and Hades by Win-Labor. Verena is going to add support for eventtypes, but was asking of the syntax to be supported. Could you please advise her?

I think we should concentrate effort to fix this on the service registration side, not by adding heuristics on the client side (which would then need to be copied to every other client).

Yes, sure - we've already introduced some perfsonarUI code that relies on eventtypes registered in LS and are trying to figure out how it will work with services other than RRD MA.

Nina

jeff



Best regards,
Nina

Nicolas Simar wrote:


Nina Jeliazkova wrote:
Hi Verena,

I can only refer to how it is currently done by RRDMA.

Nicolas - is there documentation what services should register into LS? Perhaps it is worth to bring this discussion to perfsonar-dev mailing list?

Yes, bring it there. We need a decision taken for early next week.
Please involve Pomodoros as he is the functional tester, he should (?) know where is the registration documentation and how it should be done.

Nicolas

Regards,
Nina

Verena Venus wrote:

Hi Nina,

Am Mittwoch, 28. Mai 2008 11:51:59 schrieb Nina Jeliazkova:

Hi Verena,

The reason for asking is that Jason recently advised us not to rely on
arbitrary strings in "servicetype", but on event types , that are
registered in the LS along with the topology elements. We are in the
process of creating an workflow for psUI, which will recognize the
service type based on the reported eventtypes. Do you have plans to
include this information in LS registration?


I can include eventtypes and I think this is a very useful information. Can you please point me to a schema definition how this should look like?

Thanks,
Verena


Best regards,
Nina

Verena Venus wrote:

Hi Nina,

Am Mittwoch, 28. Mai 2008 11:33:07 schrieb Nina Jeliazkova:

Hello all,

We had a discussion today about LS usage and its integration with
perfsonarUI and I have the following questions:

* Can you point me to a some document, describing what BWCTL and
Hades services are registering into an LS, beside service URL.

Not really, this is still an open question!
At the moment, the services are only registering the following
information:

- URL
- contact information
- servicetype (MP/MA)
- name
- description

I would be quite happy to know what information, and in what format I
should register.


* Is there a lookup service, which already registers BWCTL and Hades
services?

For test purposes I always used:
http://selena.acad.bg:8070/axis/services/LookupService


* I could propose to use our new LS for registering these services
(for test purposes)
http://uran.acad.bg:8080/XML-LS/services/LookupService, but of
course anything else is welcome.

I can configure the JRA1 boxes to take this one. (I have to update them
(see mails before), and can setup the LS registration then also.)

Kind regards,
Verena












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