[ofa-general] Re: on the coexistance of uDAPLs

[James Lentini]

On Thu, 12 Apr 2007, Karl Feind wrote:

> 
> 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

[adding Arlin Davis to the cc list]

Karl,

I agree with you entirely. Clearly the current rpm install/uninstall 
behavior is incorrect. Do you have patches to address the problem?

-james