Transcript VODKA: as VO-tools can be usefull for data mining science

R. Smareglia1, O. Laurino2, M. Brescia3
INAF - OATs
2 Smithsonian Astr. Obs.
3 INAF - OANa
1
Jenam 2011 – Saint Petersburg



New services and new data continuously pop up, especially when the
time domain comes into play (e.g. ELTs: LSST, OWL, ALMA, GAIA).
The Virtual Observatory is getting more and more alive
The interaction with the VO (in order to fetch data) is basically
synchronous.
◦ complex queries may take some time to run.
Jenam 2011 – Saint Petersburg


Jenam 2011 – Saint Petersburg
A Dam can be useful
Vodka users can
be kept updated
asynchronously and
automatically






expose the power of the VO but not its complexity;
make users perceive that the Virtual Observatory is alive, and
easily understand whether the VO is useful to them or not;
try and pick the best features of the best existing VO data
fetching tools;
give the user a quick glimpse of what he can find inside the
VO;
save user’s inquiries;
Develop link with data mining specific tools for building
datasets.
Vodka is on it way to fully achieve all these goals.
Jenam 2011 – Saint Petersburg



VO newbies: no apps to download in order to start,
automatic updates, live examples (no SQL, ADQL or
other buzzwords whatsoever);
VO frequent flyers: many datasets (maybe
inquiries) to manage, keeping up with new data;
Data miners: multi - cross matching, multi-BoK
extraction.
Jenam 2011 – Saint Petersburg

An inquiry is defined by its searching criteria.
It may carry only resources (Registry Inquiry)
or also data (Data Inquiry)
Jenam 2011 – Saint Petersburg
An inquiry consists of several snapshots;
A snapshot consists of several resources
each resource will have its own file.
Jenam 2011 – Saint Petersburg
Jenam 2011 – Saint Petersburg









Set up inquiries and decide the updating rate;
receive updates directly to their mailbox;
view inquiry details, i.e. the critera and the list of snapshots;
view snapshot details, i.e. the list of resources of a specific
snapshot;
view the history of incremental time differences between
snapshots, both in terms of resources and data;
download a single votable for the entire snapshot;
download a single votable for each resource in a snapshot, as
it appeared when the snapshot was taken.
download incremental files (new data, old data, missing data);
broadcast data to SAMP-enabled applications (e.g. Topcat,
Aladin)
Jenam 2011 – Saint Petersburg

Vokda 2.0 is under development (end of August)
It must be a scalable application ( working on cluster )

Data mining specific tools for, e.g., BoK extraction;

Specific clients for most active services (e.g. simbad, ned, ads);

Add more capabilities (e.g. VO-TAP);

Finalize SOAP web service and client API packages (Java, Python);

Integration with VOSpace;
Jenam 2011 – Saint Petersburg
Jenam 2011 – Saint Petersburg
Jenam 2011 – Saint Petersburg



A web application (or a Rich Internet Application, RIA) accessible
through a simple web browser, hence a web page enhanced by
user dynamical interaction
The interface design objective behind DAME web application is to
simulate the intuitive, immediate interaction of a traditional
desktop application, but doesn’t require any local installation.
DAME apps provide in a transparent way all remote computing
power and storage to the user (Cloud/Grid).
Jenam 2011 – Saint Petersburg


About Data Mining we are at level of “gold
Prospector”
With Vodka we have created a tool to improve the efficiency…
(we hope).
Jenam 2011 – Saint Petersburg
Where you can find Vodka:
 http://ia2.oats.inaf.it/vodka
VOkda 2.0 is under test, will be on-line asap ( end of August )
DAME website:
 http://dame.dsf.unina.it/
Jenam 2011 – Saint Petersburg