[ofa-general] on the coexistance of uDAPLs

[Karl Feind]

Hello James,

We are trying to find a way for the OpenIB-cma uDAPL layer to coexist 
with SGI's xpmem uDAPL on a single system.   

Obviously, the installation scriptlets for xpmem uDAPL need to 
add lines into /etc/dat.conf when xpmem UDAPL is installed.
Since a static version of /etc/dat.conf is simply installed
when the OpenIB-cma uDAPL layer is installed (via the "dapl"
RPM), we are left in the awkward position that later upgrades
of OpenIB-cma uDAPL will overwrite the /etc/dat.conf file,
removing the other registered uDAPL layers.

Clearly, we need to agree on a conventional way that a uDAPL
layer can register itself in /etc/dat.conf when it gets installed and 
unregister itself when it gets uninstalled.   Furthermore, upgrading
one uDAPL should not have adverse effects on other uDAPLs.  I don't
see how this can be done with the current RPM structure.

Thanks for any guidance.

Karl Feind
SGI MPI and DAPL Engineering Team