Hi Ralph, Thanks a lot for your effort and giving us freedom to choose hosts dynamically. I am really excited to see such great feature working in my programs.
again thank you very much :) Regards, On Tue, Jul 14, 2009 at 8:11 PM, Ralph Castain <r...@open-mpi.org> wrote: > Hi Vipin > I have added support for these features to the OMPI trunk repository. They > are only accessible via MPI_Comm_spawn or MPI_Comm_spawn_multiple, specified > as MPI Info keys "add-host" and "add-hostfile". Check the man pages for > those functions to see how they are used. > > Quick summary: I add the hosts found in any add-host and add-hostfile > specifications to the list of hosts known to mpirun, and then use the > provided hosts to constrain the launch of the specified apps. So spawning an > app of "foo" with an info key of "add-host mike" will result in foo being > launched on mike, without mpirun having previous knowledge of "mike". > > You'll have to wait to try it, though, until another problem in comm_spawn > on the trunk gets fixed - hopefully, real soon (someone is working on it). > > HTH > Ralph > > On Jul 2, 2009, at 1:28 AM, vipin kumar wrote: > > Hi Ralph, > > To add few more points to my queries, as you said earlier "addhost" and > "addhostfile" features will come soon. So can you please tell how we are > going to use those features, will there be any API for that to calll from > inside the program or we have to execute command to use those features. > > Thanks, > > Regards, > On Thu, Jul 2, 2009 at 12:46 PM, vipin kumar <vipinkuma...@gmail.com>wrote: > >> Hi Ralph, >> >> I am thankful to your reply regarding the matter, however to carry forward >> with my activities it would be of great help if I can know where >> OpenMpi/mpirun holds the contents of "hostfile" so that I can dynamically >> add/alter the values till such a feature is officially included in OpenMpi >> in the form of "addhost" and "addhostfile". >> >> Thanks. >> >> Regards, >> >> >> On Thu, Jul 2, 2009 at 12:23 PM, Ralph Castain <r...@open-mpi.org> wrote: >> >>> At the moment, the answer is "no". :-/ >>> However, we do have a "ticket" in our plans to add a "addhost" and >>> "addhostfile" capability to the system. I haven't implemented it yet because >>> of other priorities and the fact that nobody has asked for it before now. >>> >>> Well...actually, people -did- ask for it a long time ago, but not for >>> quite awhile now. ;-) >>> >>> Anyway, I can implement those features pretty easily. Could get to it in >>> the next few days - otherwise, it will have to wait another week as I will >>> be out. >>> >>> Either way, though, it would only be in the OMPI devel trunk until the >>> next feature series (1.5) has its first release. Haven't set the date for >>> that, though it will likely be this summer. >>> >>> Ralph >>> >>> On Jul 2, 2009, at 12:45 AM, vipin kumar wrote: >>> >>> Hi all, >>> >>> I got the solution but its not flexible. I have to provide two host files >>> "chfile" and "dhfile". Contents of host files are as follows >>> >>> $ cat chfile >>> #This file contains all slaves as well as master node >>> localhost >>> 200.40.70.193 >>> >>> $cat dhfile >>> #This file contains all slave nodes >>> 200.40.70.193 >>> >>> and the command line I am using is >>> >>> $ mpirun -np 1 -hostfile chfile launcher -hostfile dhfile >>> >>> but this is not what I want. >>> I don't know in advance which and how many remote nodes can be there. >>> Dynamically nodes may be added and requested to serve the master. So I am >>> assuming that I have only local machine where I will invoke launcher >>> program. When one remote node gets added launcher program will launch one >>> "slave" in local machine and one "rslave" in remote machine. >>> >>> Is there any other way to do this. >>> >>> Thanks. >>> >>> Regards, >>> >>> On Mon, Jun 29, 2009 at 10:49 AM, vipin kumar <vipinkuma...@gmail.com>wrote: >>> >>>> Hi all, >>>> >>>> I am trying to spawn dynamically processes in remote as well as local >>>> machine using MPI::Intracomm::Spawn_multiple. I am using MPI::Info object >>>> to >>>> tell where to launch processes using "host" key and "<ip_address>" as its >>>> value but but I am getting the error >>>> >>>> >>>> -------------------------------------------------------------------------- >>>> There are no allocated resources for the application >>>> slaveprocess >>>> that match the requested mapping: >>>> >>>> >>>> Verify that you have mapped the allocated resources properly using the >>>> --host or --hostfile specification. >>>> >>>> -------------------------------------------------------------------------- >>>> >>>> I tried with "<hostname>" too. >>>> but its not working. >>>> >>>> It works fine if I give the value "localhost" to "host:" key. It >>>> launches successfully processes in local machine. >>>> >>>> any help will be greatly appreciated. >>>> >>>> Regards, >>>> -- >>>> Vipin K. >>>> Research Engineer, >>>> C-Dot, Bangalore, India >>>> >>> >>> >>> >>> -- >>> Vipin K. >>> Research Engineer, >>> C-DOTB, India >>> _______________________________________________ >>> users mailing list >>> us...@open-mpi.org >>> http://www.open-mpi.org/mailman/listinfo.cgi/users >>> >>> >>> >>> _______________________________________________ >>> users mailing list >>> us...@open-mpi.org >>> http://www.open-mpi.org/mailman/listinfo.cgi/users >>> >> >> >> >> -- >> Vipin K. >> Research Engineer, >> C-DOTB, India >> > > > > -- > Vipin K. > Research Engineer, > C-DOTB, India > _______________________________________________ > users mailing list > us...@open-mpi.org > http://www.open-mpi.org/mailman/listinfo.cgi/users > > > > _______________________________________________ > users mailing list > us...@open-mpi.org > http://www.open-mpi.org/mailman/listinfo.cgi/users > -- Vipin K. Research Engineer, C-DOTB, India
