TAP, skynode, or boutique?
roy at cacr.caltech.edu
Fri Sep 5 08:14:06 PDT 2008
Dear DAL WG
I am writing to ask if the Skynode protocol will continue to be
supported in the broader IVOA. Most of the current implementations seem
to be at Johns Hopkins University -- is that true? Are there other
skynodes out there that are and will be properly maintained?
A group of us in US-VO are developing an application (Vim) that handles
multiple sky positions by running proximity (cone) searches against
published catalogs. Thus a single click of the mouse can cause execution
of a thousand separate cone searches against a single server. This can
be very slow, and we would like to scale things up. We want a crossmatch
service -- by which I mean no more than multiple cone searches. We want
to do a thousand or a million cone searches in one "crossmatch" request.
Which of these paths should the Vim team follow:
(1) After years of discussion in this WG, I am still not seeing the
emergence of anything like simple crossmatch in the TAP specification.
So I guess we are still more years from widespread, solid implementation
of TAP that can do crossmatch. Is that true?
(2) The Skynode protocol can do crossmatch already, and I wonder if this
is the direction the Vim team should follow instead of waiting for TAP.
However, before doing this, we would really like an assurance that there
will continue to be multiple organizations supporting Skynode!
(3) The third way to get fast crossmatch would be to look through all
the data center web pages looking for their own crossmatch services (eg
), and then build a custom interface from Vim to each data center.
Thank you for your help
California Institute of Technology
626 395 3670
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