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Question:

Are there any limitations on I/O that can be performed by migrated processes

Answer:

Usually, remote I/O done by migrated processes on remote nodes is performed via the respective home-node of each process. While this does not limit the allowed operations, it may slow-down such processes. Thus, if the amount of I/O is significant, it will often cause the process to migrate back to its home-node.

Note that the amount and frequency of I/O is taken into account and weighted against other considerations in making such a decision.

The direct-communication (migratable socket) can reduce this slow-down affect for I/O between communicating processes.