cluster-computing

I have an R code that involves several foreach workers to perform some tasks in parallel. I am using foreach and doMC for this purpose. I want to let each of the foreach workers recruits some new workers and distribute some parts of their code, which is parallelizable, to them. The current code looks like: require(doMC) require(foreach) registerDoMC(cores = 8) foreach (i = (1:8)) %dopar% { <<some code here>> for (j in c(1:4)) { <<some other code here>> } } I am looking for an ideal code that would look like: require(doMC) require(foreach) registerDoMC(cores = 8) foreach (i = (1:8)) %dopar% { <

I'm curious that I can use both socket.io and Cluster. I know that cluster uses multi-core to work on node.js with multiple workers. That means if I use cluster for socket.io, two users with connected on two different socket.io might cause problem that they cannot communicate each other? So rather not using cluster on socket.io would be an answer? alessioalex Checkout dshaw's talk and sample app regarding scaling Socket.IO: https://github.com/dshaw/talks/tree/master/2011-10-jsclub/sample-app Also this stackoverflow question might help: How to reuse redis connection in socket.io? Basically use

UPDATE: Even if this particular scenario is not realistic, as per comments, I'm still interested in how one could write a module that makes use of clustering without rerunning the parent process each time. I'm trying to write a Node.js module called mass-request that speeds up large numbers of HTTP requests by distributing them to child processes. My hope is that, on the outside, it work like this. var mr = require("mass-request"), scraper = mr(); for (var i = 0; i < my_urls_to_visit.length; i += 1) { scraper.add(my_urls_to_visit[i], function(resp) { // do something with response } } To get

I am trying to adjust some bash scripts to make them run on a ( pbs ) cluster. The individual tasks are performed by several script thats are started by a main script. So far this main scripts starts multiple scripts in background (by appending & ) making them run in parallel on one multi core machine. I want to substitute these calls by qsub s to distribute load accross the cluster nodes. However, some jobs depend on others to be finished before they can start. So far, this was achieved by wait statements in the main script. But what is the best way to do this using the grid engine? I already

I'm trying to install Rmpi package on a LAM MPI cluster machine. Previously I had been compiling and testing some stuff ( mpi4py and small C++ programs) so I'm sure the MPI itself works. However installing Rmpi package fails when linking libraries. My main suspect is a call to gcc instead of mpicc in makefile (I'm trying to find the line in configuration to change this but so far could not locate it). Does somebody have experience with installing Rmpi on LAM, and how did you manage that? Architecture LAM MPI (or maybe PBS MPI if such exist, how do I check?). One thing for sure, I have mpicpp

I have a website running with JBoss 4.2.2 on an existing Red Hat server. I'm setting up a second server so as to have a clustered pair (which will then be load-balanced). However, I can't get them to cluster successfully. The existing server starts up JBoss with: run.sh -c default -b 0.0.0.0 (I know the 'default' configuration doesn't support clustering out of the box - I'm using a modified version of it which includes clustering support.) When I start the second JBoss instance with the same command, it forms its own cluster without noticing the first. Both use the same partition name and

I am in planning phase of a multi-node Hadoop cluster in a Docker based environment. So it should be based on a lightweight easy to use virtualized system. Current architecture (regarding to documentation) contains 1 master and 3 slave nodes. This host machine uses HDFS filesystem and KVM for virtualization. The whole cloud is managed by Cloudera Manager . There are several Hadoop modules installed on this cluster. There is also a NodeJS data upload service. This time I should make architecture Docker based. I have read several tutorials and have some opinions, but also open questions. A. What