Hi BW, On Jan 15, 2012, at 9:51 AM, B W wrote:
>> >> Ok. Great! Thx. > But, no matter what concrete message layer substrate we choose the > synchronous nature imposed by OODT's architecture still exists. +1, unless we simulate event-based delivery (via polling), as is what happens in the OODT Workflow Manager. > > Which I guess highlights the importance of advanced planning of reusable > scientific work flows that can be automated. +1. > > This is a mitigation tactic of the synchronous nature through staging and > checkpoints for fault tolerance and recovery? +1, you got it, it certainly helps with staging and with fault tolerance/checkpointing. Cheers, Chris ++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++ Chris Mattmann, Ph.D. Senior Computer Scientist NASA Jet Propulsion Laboratory Pasadena, CA 91109 USA Office: 171-266B, Mailstop: 171-246 Email: [email protected] WWW: http://sunset.usc.edu/~mattmann/ ++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++ Adjunct Assistant Professor, Computer Science Department University of Southern California, Los Angeles, CA 90089 USA ++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
