Variations on PRAM
Resolving the memory
conflicts considers read and write conflicts separately
•Exclusive
read/exclusive write (EREW)
•The
most limited model
•Concurrent
read/exclusive write (CREW)
•Multiple
readers are OK
•Concurrent
read/concurrent write (CRCW)
•Various
write-conflict resolutions used
•There
are at least dozen other variations
All theoretical -- not used in
practice