UWS PENDING Destruction Time can be immediate

[Petr Skoda]

Hi all

just briefly looking in ongoing discussion I am wondering why someone has 
again the tendency removing something important from UWS - 2 years ago it 
was ABORT / DELETE discussion.

In my opinion the UWS has already proved its clever design in many cases. 
Maybe you remember my special use case called VO-CLOUD which contains 
interactive experiments (e.g. data mining of spectra profiles) on master 
which uses UWS to launch the real computation on some "workers " using 
UWS.

We perfectly exploit the PENDING when the master server get uploads of all 
(big) input files and parameters and selects the posible workers (taking 
into account their particular capability - i.e. the libraries and binaries 
installed) and is in principal ready to lauch job when asked to do so (it 
contacts the worker and tells him handle where he can download the 
encrypted data for run).

The trick is the user can upload (prepare) many experiments - so the 
jobs are created (put into database of experiments etc ) which are in 
PENDING state  and later (e.g. from a mobile phone) can decide which one 
is to be run .....

But from the we client of master server with experiments he can 
immediately select from menu the "RUN immediately" which creates job and 
sends it directly to worker using POSTIng PHASE=RUN ...

So it is fully under user control what he wants to run later .
The idea si to set a work for "whole week" and control from mobile the 
status (checking images , logs outputs of convergence etc ....) 
he may even decide to ABORT the job in PENDING phase when he sees the 
nonsense of given parameters in an experiment (e.g. similar set did not 
converge....)

So we need both PENDING , immediate RUN, ABORT and DELETE
in fact all what is in UWS...

details may be seen in


http://wiki.ivoa.net/internal/IVOA/InterOpOct2014Applications/defbanff-vocloud.pdf


Regards,


Petr
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*  Petr Skoda                         Phone : +420-323-649201, ext. 361 *
*  Stellar Department                         +420-323-620361           *
*  Astronomical Institute AS CR       Fax   : +420-323-620250           *
*  251 65 Ondrejov                    e-mail: skoda at sunstel.asu.cas.cz  *
*  Czech Republic                                                       *
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