| Message Passing Toolkit: Release Notes - 004-3689-001 | ||
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This chapter describes the compatibility issues that users should consider when purchasing MPT version 1.4.
Users may have to change the way they run MPI programs because internal buffering is no longer done as of MPT 1.4 on Cray T3E-900 systems or later:
If a user is accustomed to turn off internal buffering by setting the environment variable MPI_BUFFER_MAX to 0, doing so is no longer necessary.
If an illegal program relies on internal buffering, the user will have to set the environment variable MPI_BUFFER_MAX to some value for the program to run.
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