registry of registries

[KevinBenson]

This does sound pretty good, could you elaborate a little more on some
scenarios just to make it clear exactly what is happening.

----
Let me go off on a little bit of a tangent to see if I migth have read it
correctly:
Could we use the master registry as the main harvester and harvesee?
Meaning much like today(with full registries) the master registry goes off
harvesting all Publishing and Full Registries quite frequently.  Then Full
Registries could come and harvest the master Registry for everything it ever
needs.  This sounds really good where Full Registries do not need to go to
all the registries to get the same data that it could get at the Master
Registry.  Where by something like oai:ListRecords always returns everything
but normally via "from" date would be used.  Also assuming no search
interface to the master registry.

Cheers,
Kevin

-----Original Message-----
From: owner-registry at eso.org [mailto:owner-registry at eso.org]On Behalf Of
Robert Hanisch
Sent: 07 April 2005 21:51
To: registry at ivoa.net
Subject: registry of registries


Following today's regular NVO technical telecon, Ray Plante asked that I
post a suggestion I made this morning to this list that might help
clarify/simplify some of the fairly complex ideas people are discussing
regarding hierarchies of registries and such.

I would not expect that we will have a vast number of publishing registries.
Dozens, perhaps hundreds, but not likely anything approaching the many
thousands of resources we already have in the registries themselves.  Thus,
we could easily track the publishing registries through an IVOA master
registery.  A site with a publishing registry would register it in the IVOA
master registry.  Sites providing full searchable registries could query the
master registry to make sure their harvesting is complete.  There would be
no need to learn of other registries via word of mouth, or through more
complex or ad hoc approaches, and no need to worry strictly about national
or international hierarchies.  This seems to me a natural function for the
IVOA.  A replica site could certainly be set up to avoid single point of
failure issues.  However, even this does not seem so important given that
the only likely users of the IVOA master registry would be other registries,
and there is little here that is of high time criticality.

Folks on the NVO telecon seemed supportive of this idea.

Cheers,
Bob