[glue-wg] Cloud extensions

Tue Sep 1 10:39:32 EDT 2015

Hi all,

A correction to what JP said and a few comments about GLUE2 adoption and
its use for integration:

On 2015-08-28 15:16, navarro wrote:
> Alan,
> 
> BDII is an implementation based on a (I believe) old standard: GLUE
> 1.2. 

BDII runs fully all glue schemas, including GLUE2.

> I don’t think it really matters what implementation anyone uses
> and whether internally it is standards based. The important question
> is whether they have interoperability requirements, and if so whether
> they use (GLUE) standards for interoperability. In other words, do
> they have an interoperability interface in their implementation.
> 
> I don’t know if they have interoperability requirements, and if they
> do how they will satisfy them. I am curious and have contacts in OSG
> so I will try to find answers.
> 

I think the question is whether GLUE managed to foster such
interoperability or not. BDII is LDAP based and pros and cons have been
discussed in this mailing list before. I believe OSG just wants to drop
that technology, but doesn't really need Glue in general. The claim I've
heard in meetings is that they explicitly do NOT want to migrate to
GLUE2, so I guess they don't even need the schema.

As for interoperability, the only existing interoperable systems based
on GLUE2 I know are dCache, BDII, ARC and GOCDB to some extent. However,
GLUE2 does not define aggregation, which makes interoperability loosely
defined.

I am following the discussions in a working group at CERN about the next
generation information system (read: for CERN experiments) and GLUE2 is
rarely mentioned there. Some of the concepts also fail to be defined in
GLUE2 without a different interpretation of some of the attributes,
which actually takes us far from integration.
Remember the discussion on how to identify a data transfer protocol on
this mailing list? We even failed to have an agreement here....

> JP
> 
>> On Aug 28, 2015, at 7:40 AM, Sill, Alan <alan.sill at ttu.edu> wrote:
>> 
>> While I think it is worth exploring new paradigms in this area, it
>> is definitely the case that the EGI Federated Cloud makes explicit
>> mention of using GLUE in all of its public talks, so keeping
>> discussion and support going with them in this area would seem to
>> be a good idea.
>> 
>> More troubling to me is that the Open Science Grid has apparently
>> abandoned use of BDII and seems to be going in a new direction for
>> its related tasks. OGF's role and interest in these areas is always
>> just to provide a forum and arena to document and to encourage
>> exchange of information among participants on best practices and
>> methods, including development and support of standards where
>> appropriate.
>> 
>> Is a discussion underway with OSG about its needs and current
>> approach? Can we understand what led them to stop using BDII and
>> GLUE (or did I misunderstand their current approach and get this
>> wrong)?
>> 
>> At a somewhat higher level, should we restart or recommission a
>> community or working group to look at overall practices in this
>> area, with a focus on new technologies?
>> 
>> Alan
>> 
>> 
>> 
>>> On Aug 12, 2015, at 4:14 AM, Florido Paganelli
>>> <florido.paganelli at hep.lu.se> wrote:
>>> 
>>> Hi Paul,
>>> 
>>> AFAIU there is no status, we dropped it because EGI did not come
>>> back to us about it anymore and they seemed to be the only
>>> interested ones. I personally hardly think that anybody in the
>>> cloud world would find GLUE2 appealing. If you have some use for
>>> it I recommend you talk directly to Salvatore Pinto who
>>> contributed a lot to it, and if you have ideas to carry it on, we
>>> can rediscuss how to integrate it in the existing schemas.
>>> 
>>> Cheers, Florido
>>> 
>>>> On 2015-08-12 10:27, Paul Millar wrote: Hi guys,
>>>> 
>>>> I was wondering what it the current status of the proposed
>>>> cloud extensions to GLUE 2.0?
>>>> 
>>>> Are there any documents (wiki pages, etc) that have the current
>>>> status?
>>>> 
>>>> Cheers,
>>>> 
>>>> Paul. _______________________________________________ glue-wg
>>>> mailing list glue-wg at ogf.org 
>>>> https://www.ogf.org/mailman/listinfo/glue-wg
>>> 
>>> 
>>> -- ================================================== Florido
>>> Paganelli ARC Middleware Developer - NorduGrid Collaboration 
>>> System Administrator Lund University Department of Physics 
>>> Division of Particle Physics BOX118 221 00 Lund Office Location:
>>> Fysikum, Hus A, Rum A403 Office Tel: 046-2220272 Email:
>>> florido.paganelli at REMOVE_THIShep.lu.se Homepage:
>>> http://www.hep.lu.se/staff/paganelli 
>>> ================================================== 
>>> _______________________________________________ glue-wg mailing
>>> list glue-wg at ogf.org 
>>> https://www.ogf.org/mailman/listinfo/glue-wg
>> _______________________________________________ glue-wg mailing
>> list glue-wg at ogf.org https://www.ogf.org/mailman/listinfo/glue-wg
> 

-- 
==================================================
 Florido Paganelli
   ARC Middleware Developer - NorduGrid Collaboration
   System Administrator
 Lund University
 Department of Physics
 Division of Particle Physics
 BOX118
 221 00 Lund
 Office Location: Fysikum, Hus A, Rum A403
 Office Tel: 046-2220272
 Email: florido.paganelli at REMOVE_THIShep.lu.se
 Homepage: http://www.hep.lu.se/staff/paganelli
==================================================