LCR-908 (keep all releases spinning): Included discussion of the interpretation of an LSR-level requirement to make (old) data recomputable on demand. Do we already have to do this? Requires a substantive intra-DM discussion. Mario Juric: we have promised this to users.Gregory Dubois-Felsmann: we have not adequately costed a requirement to maintain a service that can run DR1 code in Year 11 to regenerate non-persisted data products on demand. There is no debate that we are required to maintain enough information (data, code, calibrations) to permit a motivated party to set up the recomputations.
Proposed change request to keep Processed Visit Images (PVIs, a/k/a calexps) on disk for active releases: Current baseline is to keep only most recent 30 days and recreate others on demand. Recreation on-demand requires staging raw data from tape and then reprocessing through at least the single-visit level of processing. Latency for a request could be 10s of minutes, more depending on demand and on contention for tape drives. Need to estimate demand.
Unknown User (ciardi) to prepare the science case for PVI storage. NCSA will provide an initial sizing estimate.
Proposed change request to keep HeavyFootprints on disk for active releases: Current baseline is that these are discarded after processing and must be recomputed by re-running deblending. No clear statement in our design that a HeavyFootprint-recomputation service will be provided.
Jim Bosch and DRP to prepare the science case and estimate the amount of storage required.
Beth Willman (at CCB meeting last week): Change requests should be submitted before May in order for them to be taken into account in the operations proposal.
IVOA in Shanghai - Fritz Mueller wants Kenny Lo and Brian Van Klaveren to attend and ...
Fritz Mueller will write a justification for this travel (IVOA Shanghai).
DMLT F2F meeting - early May in Seattle? There is a PST meeting scheduled for May 8 and 9 in Seattle, so maybe we can work around this since staff from the East coast will be flying in for this meeting.
Unknown User (lpetrick) will send out a Doodle poll today to capture everyone's availability the first two weeks of May.
Sizing Model Seminar to be presented by Kian-Tat Lim on Wednesday, 3/29, from 11-1 Pacific (BlueJeans 293724745 (DMLT, ls.st/jmc)).
Software Distribution Policy - Frossie Economou has been in discussion with Scott Daniel and Mike Reuter re CentOS or binaries; here is a link to discussion notes:
NCSA is asking about requirements for data challenges and operational dress rehearsals, for planning purposes including hardware acquisition; Mario Juric will talk off-line and get this started.