@voltone and others have benchmarked the registry. I have consolidated @voltone results here:
https://docs.google.com/spreadsheets/d/1MByRZJMCnZ1wPiLhBEnSRRSuy1QXp8kr27PIOXO3qqg/edit#gid=0 Summary: on a machine with 40 cores, a Registry with 40 partitions provides across the board better results on concurrent registration. Without partitioning, the Registry starts to scale poorly when the concurrency factor is somewhere between 8 and 20. Surprisingly, gproc performs quite well, even in concurrent scenarios. <speculation>I am assuming serializing writes ensures there is no contention for concurrent threads, so less coordination and process switches.</speculation> Erlang's built-in atom registration does not perform well in highly concurrent scenarios but that's fine. It was not meant to support dynamic names registration anyway (and doing so would certainly be a bug in your app!). *José Valim* www.plataformatec.com.br Skype: jv.ptec Founder and Director of R&D On Wed, Oct 26, 2016 at 2:58 PM, José Valim <jose.va...@plataformatec.com.br > wrote: > > Why can’t you do similar to what you’re doing with dispatch: N > concurrent reads and then reduce results into a list? > > We could do that although I am afraid doing N concurrent reads will likely > add more overhead than not. We will need to spawn multiple processes and > then copy the data back. > > To put it another way, we could support it, but there is a cost per > partition which I am afraid we can't go around. > > > How is different from registering a GenServer with the {:global, term} > name where term can be dynamic ? > > The global term is distributed. It means that the value is global across > *all nodes*, which also incurs communication costs on multi-node setups. > > > > *José Valim* > www.plataformatec.com.br > Skype: jv.ptec > Founder and Director of R&D > > On Wed, Oct 26, 2016 at 2:47 PM, matteo brancaleoni < > mbrancale...@gmail.com> wrote: > >> Hi, >> >> >>> >>> * Process registry: to register process with dynamic names. Often Elixir >>> developers need to rely on gproc or other tools. >>> >> >> How is different from registering a GenServer with the {:global, term} >> name where term can be dynamic ? >> >> (I'm rather new in elixir, so excuse me if is a silly question) >> >> >> > -- You received this message because you are subscribed to the Google Groups "elixir-lang-core" group. To unsubscribe from this group and stop receiving emails from it, send an email to elixir-lang-core+unsubscr...@googlegroups.com. To view this discussion on the web visit https://groups.google.com/d/msgid/elixir-lang-core/CAGnRm4LQ842E2f9SM6rAsX3OBySexfan0suvjFq%2BUc46y4s9AA%40mail.gmail.com. For more options, visit https://groups.google.com/d/optout.
