Perseus Status in Data Access
2006-05-05
My work on stageCollection and Python-based FIC continues. I have
revised my approach for source/destination transfer pair balancing to
optimize along both dimensions of data size and file count. The
previous approach was roughly size-balanced but disparate in the file
counts assign to each "pipe". Moving away from balanced transfer
issues, I am now focusing on transforming input XML staging policies
into output XML OGRE workflows; the workflows will do the actual
transfer of data. I'm using a combination of XSL and Python in
prototyping the transformations.
I've resumed work on implementing FITS Image Collection (FIC) support
for the UML Image-related classes. As things stand now, there is
essentially just one implementation in place for the classes Image,
CCDImage, and MosaicImage. That implementation is pure FITS-oriented
and handles single- and multi-extension FITS files. What I'm doing now
is creating a second, alternative implementation based on FIC. To
achieve this, I'll be regarding Image, CCDImage, and MosaicImage as
interfaces rather than the current sole implementation, and I will
rearrange the current FITS implementation so as to extend from these
interfaces in spirit. Likewise, I will extend from the interfaces for
the FIC implementation.
Chris Cribbs has been focusing on his non-LSST responsibilities as of
late, but continues to assist with hardware proposal issues and the like.
--
David Fleming
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