Hi, LNet reserved 32 bits for network number, so you can choose a very large network number if only have a few networks, but really create many networks will have some issues: - o2iblnd will pre-allocate memory resources for each network, so it will consume a lot of memory - Main stream LNet will have performance issue if there're many networks, for example, hundreds, although it's not difficult to fix this.
Liang On Aug 8, 2012, at 10:23 PM, Rick Mohr wrote: > > I was curious what limitations exist for o2ib network numbers. Most of > the time I am dealing with o2ib0, o2ib1, etc. As as experiment, I tried > configuring a machine with o2ib1000, and that seemed to be OK. I > figured there must be some limit on how large the network number can > get, but after doing some searching, I have been unable to find any docs > that specify a limit. Does any know what the max network number is? > > -- > Rick Mohr > HPC Systems Administrator > National Institute for Computational Sciences > http://www.nics.tennessee.edu/ > > _______________________________________________ > Lustre-discuss mailing list > [email protected] > http://lists.lustre.org/mailman/listinfo/lustre-discuss _______________________________________________ Lustre-discuss mailing list [email protected] http://lists.lustre.org/mailman/listinfo/lustre-discuss
