From: Jim Tuccillo Newsgroups: comp.parallel.mpi Subject: Re: Using both share and distributed memory Date: Tue, 11 May 1999 11:04:58 -0400 Organization: Future Services (using Airnews.net!) Message-Id: References: <3738415E.FDD427E@numeca.be> Abuse-Reports-To: dave at atlcom.net to report improper postings NNTP-Proxy-Relay: library.airnews.net NNTP-Posting-Time: Tue May 11 10:22:32 1999 Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Transfer-Encoding: 7bit Xref: ukc comp.parallel.mpi:5073 You can use shared and distributed memory simultaneously in a slightly different context. On SPs with SMP nodes, you can assign a single MPI task to each node and also have pthreads within each MPI task to use the multiple CPUs of each node. In other words, message passing is between nodes only. Roland Van Praag wrote: > > Hello, > > Is it possible with mpich to run programs using simultaneously > shared and distributed memory?. On a cluster of multiprocessor UNIX > machines, is it possible to have a global communicator allowing > communications in distributed memory between different computer and a > communicator for each multiprocessor computer using shared memory? > If it is not possible with mpich but with another version of > MPI, could someone give me information about this? > > Roland -- ========================================================================= Jim Tuccillo jjt@radia1.com IBM tuccillo@us.ibm.com 415 Loyd Road voice: 770.487.6694, fax: same, call first Peachtree City, GA 30269 http://www.radia1.com/jjt1 =========================================================================