I've got a regular process that runs, basically using key information to
grab data from an API and then update the local VFP database. There are
maybe 64000 records to process, and each record to update through this
process takes about a second, so to process this group would take over
17 hours. Each record could be processed on its own; there are no
relationships between each.
I don't want to start it and run the 64000 in a row for 17+ hours. I
would like to design the app to use the table, RLOCK the row I'm
processing, and the UNLOCK the row when I'm done. I figure with this
design, I could run multiple instances of the MyProgram.exe (similar to
how WestWind Web Connection allows you to run multiple instances) to
process the batch maybe 4x faster (if I launched 4 instances of
MyProgram.exe). The basic construct would be as follows:
USE ListOfRecsToProcess IN 0 SHARED Alias MyList && record is PK (to
process) i, tProcessed t, tError t, cSession c(10)
SCAN FOR EMPTY(cSession) AND RLOCK('MyList')
IF ProcessRecord(MyList.ID) THEN
REPLACE tProcessed WITH DATETIME(), cSession WITH this.cSession
IN MyList
ELSE
REPLACE tError WITH DATETIME(), cSession WITH this.cSession IN
MyList
ENDIF
ENDSCAN
Does anybody see any problems with that general design? The
ProcessRecord method calls an API to get values and then updates the
local VFP record accordingly.
tia,
--Mike
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