From mazz@ipac.caltech.eduMon Feb 3 17:30:38 1997
Date: Mon, 3 Feb 1997 17:29:53 -0800 (PST)
From: Joe Mazzarella
To: ISIS -- Nian-Ming Chiu ,
Roc Cutri , Tracey Evans ,
John Good , Carol Lonsdale ,
Joe Mazzarella
Cc: Tom Chester
Subject: 29-Jan 2MASS DBWG Meeting Minutes; next meeting 13:00 04-Feb
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29-Jan-97 2MASS DBWG Meeting Minutes
ATTENDED: Nian-Ming Chiu, Roc Cutri, Tracy Evans, John Good, Carol Lonsdale,
Joe Mazz
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COMPLETED ACTIONS:
Nian:
o Make new partition for general workspaces:
1) for 2MASS/ISIS developers
2) for real-time data staging during user queries (ISIS)
3) consider disk purging time-scales, etc.
o Help (w/ John) Tim get started with Informix for WIRE.
o Help Tracy load 2MASS SIM DB.
Tracy:
o Initial SIS's for DBMAN & WSDB field definitions are ready.
o Help Joe learn about 2MASS SIS's requirded for ISIS:
DNMAN, bookkeeping, scans, etc.
o Add colors to DNMAN SIS: J-H,B-R,B-J,H-K,R-K,R-J,J-K,B-K
(refine list?)
o Identify "the best" mag for extended objects (w/ Roc).
Answer: Isophotal eliptical mage, except for LCSBs where it will be a
fixed circular aperture.
o tmass.sim is now on-line. See below.
John:
o Work w/ Rosanne & Informix to finally schedule an
Informix/Illustra (Universal Server?) class for us.
*** Tentative dates for class: 18-20 Feb-97
o Help (w/ Nian) Tim get started with Informix for WIRE.
o Summarize DB-Access usage modes (e.g., shell scripts) for us.
Joe:
o Make 1st contact w/ Alex Szalay and Evaluate SDSS interface.
Email summary sent to team regarding status, Tcl/Tk, etc.
o Complete Xcatscan+IRAS sections and revisions of
Requirements doc in preparation for wider ISIS meeting.
o Review Sci. Req. doc w/ Carol
o ISIS Req/Design general meeting rescheduled to 10AM 25-Feb-97;
email will follow.
Roc:
o SIS refinements of output fields for DNMAN (w/ Tracy et al.)
o Get Sci. Team to pick a "best" (default) mag to represent
extended objects (of course, all will still be maintained)
Carol:
o Sign off on Joe's revisions to the Requirements doc.
o Discuss hardware budget with Tom & Roc.
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PRIORITY ONGOING ACTIONS:
(Long-term ongoing actions omitted here. See task schedule on our Web.)
Tracy:
o Refinements on SIS's for DBMAN & WSDB field definitions:
extended sources, mag & color uncertainties and upper limits.
o Deal with galaxies: There can be >1 extended source for a source
initially detected with point-source processing (overlapping coadds;
GALWORKS does not put these together), so galaxies will need point-source
and GALWORKS positions.
o Calibration scans need SIS's and tables in the DBMS.
~40 fields expected; define indexing scheme.
o Index timing experiments needed:
w/ and w/o various indexes, clustered indexes, etc.
John:
o Infrastructure (& User System w/ Joe) design docs.
o Design/prototype infrastructure (& User System w/ Joe) code.
o Call Cassini Project and get their story on the raid disk.
o Find out more (w/ Nian) about HP/Informix business.
Does this hardware/software bundle offer significant benefits?
Summarize in email to team.
Joe:
o Continue contacts (w/ John) with IPAC mission managers
in preparation for general ISIS 'kick-off' meeting.
o User System (& Infrastructure w/ John) design docs.
o Design/prototype User System (& Infrastructure w/ John) code.
o Install & evaluate SDSS Tcl/Tk interface for possible
inclusion or modifications in ISIS.
o Hook DBMAN SIS's to internal 2MASS Web (w/ Tracy).
o Make an "RTB" for Sybase->Informix db migration (FSC to start)
o Update 2MASS Web pages (internal docs under 1 protected index)
Nian:
o Find out more (w/ John) about HP/Informix business.
Does this hardware/software bundle offer significant benefits?
Summarize in email to team.
Roc:
o Refine mag/color uncertainties and upper limits (w/ Sci Team)
for DNMAN SIS (to Tracy).
Carol:
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GENERAL DISCUSSION/FACTOIDS:
Roc:
1) Reviewed needs for 2MASS Survey Operations DB Management software.
Nian volunteered to modify DBMS client-server software he developed
which is in operation at groundstations (Goldstone, Canabera[sp?], etc.)
to solve this need.
Network access to Informix from UMASS to IPAC is not acceptable here.
2) 600-700 GB, but more likely 1 TB will be needed for compressed image archive.
Nian:
1) Informix logging is currently turned off.
2) Loading tables w/ indexing is a lot faster than indexing after loading.
Tracy:
2MASS SIM Db is loaded, with all mags, colors, etc. indexed.
It took 25 hr to index ~12e6 rows.
A clustered index rearranges the order of the table as required.
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NEW ACTIONS (See also ONGOING above and in Web Task List):
Joe:
o Send email to proj. leaders regarding 10AM, 25-Feb ISIS
Req/Design meeting
John:
Nian:
o Will modify his own DB client-server software to solve 2MASS
Survey Operations DB Management needs at UMASS
Needs: -Simple ASCII table (rather than binary) data access.
-Limited set of dbms functions may have to be extended.
The rest will be detailed elsewhere by Roc.
Tracy:
Roc:
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