The following are my notes from two phone conversations today, for
what they are worth. Bonnie and Matt are from the Accelerator
Division.
-- Mark
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4/10/96
Talking w/ Bonnie Madre
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Johnny had a concern about different requests in the IOC conflicting
and corrupting areas of memory. The exact nature of the problem is not
known. We need to go back to Johnny to understand his concern.
Refers us to ACC guys Matt Bickley (knows about downloading stuff) and
Marty Wise (knows about bandwidth issues).
Suggests subscription to EPICS email lists. Send mail to
listserv@aps.anl.gov. One line messages are:
subscribe tech-talk
and
subscribe epics_applications
Talking w/ Matt Bickley
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Why does one need more memory in the IOC than is accounted for by the
files that are downloaded? This "factor of two memory problem" is due
to the way VxWorks reads in files. It first copies the file into
memory and then copies that copy to its final resting place. So twice
the memory is needed for each file. One solution is to break the
database into pieces. How to patch them together is not clear to me,
but he says it can be done.
On the disk the size of the database file includes not only the size
of the records themselves but also size of the default.dctsdr.
Refers us to Dave Wetherholt for incorporating the new HV record into
capfast, if that is something we want to do.