Thank you for the info. On Monday, 14 September 2020 at 13:07:25 UTC+2 rcore...@gmail.com wrote:
> I just wrote a wrapper around open mpi in Go: https://github.com/emer/empi > > Also, here's a set of random go bindings I found: > • https://github.com/yoo/go-mpi > • https://github.com/marcusthierfelder/mpi > • https://github.com/JohannWeging/go-mpi > Even a from scratch implementation: > > • https://github.com/btracey/mpi > Also a few libraries for using infiniband directly: > > • https://github.com/Mellanox/rdmamap > • https://github.com/jsgilmore/ib > • https://github.com/Mellanox/libvma > Some discussion: > https://groups.google.com/forum/#!topic/golang-nuts/t7Vjpfu0sjQ > > - Randy > > > On Sep 14, 2020, at 3:25 AM, Samuel Lampa <samuel...@gmail.com> wrote: > > > > On Thursday, June 11, 2015 at 2:53:36 PM UTC+2 Egon wrote: > > 1. In which cases a cluster of say 4 (or 10 or 100 for instance) > Raspberry Pi mini computers can be more cost-effective than a single > computer with the same amount of cores (does the cost of communicating the > data between the computers via the network not outweigh the fact that they > car run tasks simultaneously) ? > > > > The general answer is Amdahl's Law ( > http://en.wikipedia.org/wiki/Amdahl%27s_law), of course it's not always > applicable ( > http://www.futurechips.org/thoughts-for-researchers/parallel-programming-gene-amdahl-said.html). > > When moving things to multiple-computers you'll get a larger overhead in > communication when compared to a single-computer, at the same time you may > reduce resource-contention for disk, RAM (or other resources). So depending > where your bottlenecks are, it could go either way... > > > > Yes, and also note that super-computers often use special network > protocols/technologies which support so called "Remote direct memory > access" (RDMA) [1], such as Infiniband [2], to get acceptable performance > for high-performance multi-core computations across compute nodes. > Infiniband cards are pretty expensive as far as I know, so will probably > outweigh the benefits of buying a lot of RPis. > > > > I'd still be interested to hear if anybody knows about new developments > on MPI for Go (for HPC use cases if nothing else)? :) > > > > [1] https://en.wikipedia.org/wiki/Remote_direct_memory_access > > [2] https://en.wikipedia.org/wiki/InfiniBand > > > > Best > > Samuel > > > > -- > > You received this message because you are subscribed to the Google > Groups "golang-nuts" group. > > To unsubscribe from this group and stop receiving emails from it, send > an email to golang-nuts...@googlegroups.com. > > To view this discussion on the web visit > https://groups.google.com/d/msgid/golang-nuts/d1d39602-e48e-4c2e-909b-a85d0d7e81ban%40googlegroups.com > . > > -- You received this message because you are subscribed to the Google Groups "golang-nuts" group. To unsubscribe from this group and stop receiving emails from it, send an email to golang-nuts+unsubscr...@googlegroups.com. To view this discussion on the web visit https://groups.google.com/d/msgid/golang-nuts/b408bb11-af80-4cea-af9a-cdf40844e823n%40googlegroups.com.
