Thanks for the info ! Medea & medea-clusterify are very interesting. On Tuesday, April 16, 2013 6:48:49 PM UTC+2, Kevin Swiber wrote: > > > On Apr 16, 2013, at 6:57 AM, Simon Majou <[email protected] <javascript:>> > wrote: > > Resurrecting this topic ... > > I think there is a real use case for node for shared memory. Because TCP > connections are great but will always be slower than direct access to > memory. > > To avoid any concurrency issue shared memory should be writable only by > one process. When using the cluster module, the shared memory should be > writable only by the master for example. If you want to write from a > worker, just send a message, and the master will do it. > > > On Thursday, August 12, 2010 8:24:30 AM UTC+2, Ohad wrote: >> >> I have few processes of Node, >> What is the best practice of sharing memory between those processes ? > > > I'd love to see cross-platform memory mapping in libuv with a JavaScript > API in Node… but mostly because I'm hesitant to offer cross-platform native > modules at this time. I still have issues getting the right ducks in a row > to do a Windows compilation, so I feel bad asking others to do the same. > > Right now, the best memory mapping module I've seen is MappedBuffer[1] > (See this PR[2] for v0.10 support). It delegates async operations to a > thread using uv_queue_work (something the node-mmap module does not do). > > The module only works on POSIX systems, unfortunately. It would be great > to have cross-platform support, but I'm not sure how easy it is to create a > common API over both POSIX and Windows-based systems. > > I've been working on an all-JavaScript key-value store named Medea[3]. My > initial experiment with memory mapping immutable files for the key-value > store was very promising[4]. I'm still hacking on Medea, but the end goal > is to use it as Web cache storage for an HTTP reverse proxy (which I am > also still hacking on). This effort won't come close to touching something > like Varnish without legit memory mapping, I'm afraid (not that it has to, > but it would be pretty cool). > > I'm down for spending some cycles on a native module, but I'd likely need > some assistance as I have a ton of conflicting priorities at the moment. :) > > [1] https://github.com/kazupon/node-mappedbuffer > [2] https://github.com/kazupon/node-mappedbuffer/pull/1 > [3] https://github.com/argo/medea > [4] https://github.com/argo/medea/issues/10 > > Cheers, > > -- > Kevin Swiber > @kevinswiber > https://github.com/kevinswiber > >
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