Migration

• Array objects can migrate from one PE to another

• To migrate, must implement pack/unpack or pup method

• Need this because migration creates a new object on the destination processor while destroying the original

• pup combines 3 functions into one

  • Data structure traversal : compute message size, in bytes
  • Pack : write object into message
  • Unpack : read object out of message

• Basic Contract : here are my fields (types, sizes and a pointer)