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From: Isaac Huang (iclaymore_at_[hidden])
Date: 2007-07-16 00:05:32

Hello, I read from the FAQ that current Open MPI releases don't
support end-to-end data reliability. But I still have some confusing
that can't be solved by googling or reading the FAQ:

1. I read from "MPI - The Complete Reference" that "MPI provides the
user with reliable message transmission. A message sent is always
received correctly, and the user does not need to check for
transmission errors, timeouts, or other error conditions." But the
standard is sort of vague about what exactly this "reliable message
transmission" is. Does it at least require reliable delivery? Or, does
Open MPI notice and re-transmit lost data?

2. When a data corruption happens (in message data), is the data in
the message envelop still reliable? Or, does Open MPI or the MPI
standard guarantee data integrity of message envelops? I'm
particularly interested in MPI_TAG which I use to encode things.

Thank You.

Regards, Isaac
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