UWS 1.1

[Mark Taylor]

Not sure if this helps, but for my usage purposes I'd consider anything
within a second to be pretty good service.  I typically poll every 5
seconds for TAP jobs (should really back off after a while but I don't).

On Thu, 21 May 2015, Patrick Dowler wrote:

> 
> I have (crudely) implemented this and it should go live in a day or so... will
> announce it here when it is available.
> 
> One thing that came to mind while implementing this is that it is really quite
> complex if you have load-balanced web servers. As such, I ended up using
> internal polling in case events don't get propagated(*) from the server
> running the job to the server someone is blocking on... but I don't know how
> responsive the client wants. It seems it would be nice if the client could say
> "if I had to do it, I would poll every 300ms but I'm being nice and WAIT=30
> (sec)"... The best solution is to have a distributed event mechanism on the
> server side but I can see that not having a great cost:benefit ratio. Maybe if
> the client could give a hint about responsiveness then server-side polling
> could be tuned sufficiently... WAIT=30&THREATEN-TO-POLL=100ms ? :-)
> 
> * meaning that right now I don't do this at all :-)
> 
> Pat
> 
> 
> On 21/05/15 05:50 AM, Mark Taylor wrote:
> > Hi grid,
> > 
> > I'm interested in implementing a UWS-1.1-aware client in order to
> > improve the way that I do blocking to wait for an asynchronous
> > TAP response (sec 2.2.1.1).
> > 
> > Are there some deployed TAP services out there that implement
> > UWS-1.1 blocking behaviour?  Preferably using the UWS 1.1 namespace?
> > I'd like to test client behaviour against them.
> > 
> > Thanks
> > 
> > Mark
> > 
> > On Tue, 19 May 2015, Paul Harrison wrote:
> > 
> > > Hi,
> > > 
> > > We are hoping to advance UWS 1.1 to PR status at (or perhaps before) the
> > > Sesto Interop Meeting. I believe that there are now several
> > > implementations that are being updated to adhere to the new version. It
> > > has been brought to my attention that the UWS 1.1 schema was not available
> > > in the text of the last WD that was published to the IVOA document store.
> > > For those that need a copy, it is available in volute
> > > 
> > > https://code.google.com/p/volute/source/browse/trunk/projects/grid/uws/doc/UWS.xsd
> > > 
> > > In addition I have made some small edits to the standard document - in
> > > preparation for PR - again this version is as yet only available in volute
> > > 
> > > http://volute.googlecode.com/svn/trunk/projects/grid/uws/doc/UWS.html
> > > 
> > > I believe that there is only one outstanding issue in this document in
> > > section 2.2.1.1
> > > (http://volute.googlecode.com/svn/trunk/projects/grid/uws/doc/UWS.html#blocking)
> > > highlighted in yellow. It concerns how other standards might signal which
> > > version of UWS that they are using. My current feeling is to remove this
> > > text entirely and leave it up to the other standard documents to signal
> > > the mechanism that they want to use. I think that part of the cause for
> > > this versioning issue to come up was the lack of clarity of the namespace
> > > for the UWS schema - which is now addressed by the release of a schema
> > > with a new 1.1 namespace - therefore it is safe to remove this issue from
> > > the UWS specification. Any objections?
> > > 
> > > As has recently been mentioned on the lists, we hope to have a session in
> > > Sesto on the topic of versioning of schema to form some guidelines for
> > > good practice.	
> > > 
> > > 
> > > Regards,
> > > 	Paul.
> > > 
> > > 
> > > 
> > > 
> > 
> > --
> > Mark Taylor   Astronomical Programmer   Physics, Bristol University, UK
> > m.b.taylor at bris.ac.uk +44-117-9288776  http://www.star.bris.ac.uk/~mbt/
> > 
> 
> -- 
> 
> Patrick Dowler
> Canadian Astronomy Data Centre
> National Research Council Canada
> 5071 West Saanich Road
> Victoria, BC V9E 2E7
> 
> 250-363-0044 (office) 250-363-0045 (fax)
> 

--
Mark Taylor   Astronomical Programmer   Physics, Bristol University, UK
m.b.taylor at bris.ac.uk +44-117-9288776  http://www.star.bris.ac.uk/~mbt/