Red Hat's commitment to provide binary runtime compatibility as described at http://www.redhat.com/security/updates/errata/, does not to the full extent apply to the Red Hat HPC Solution cluster middleware.

Red Hat HPC Solution, as an add-on to Red Hat Enterprise Linux, closely tracks the upstream projects, in order to provide a maximum level of enablement in this fast moving area. As a consequence, Red Hat and Platform Computing, as an exception from the general practice in Red Hat Enterprise Linux, can only preserve API/ABI compatibility across minor releases to the degree, the upstream projects do.

For this reason, applications build on-top of the HPC Solution stack, might require recompilation or even source-level code changes when moving from one minor release of Red Hat Enterprise Linux to a newer one.

This is not generally required for the underlying Enterprise Linux software stack with exception of the OFED packages specified in the Red Hat Enterprise Linux release notes at http://www.redhat.com/docs/manuals/enterprise/.