cluster-computing

In my lab, we have several servers used for the simulation programs, but they worked independently. Now I want to combine them to become a cluster using MPICH to make them communicate. But there exists a problem, which is that these servers have different OSs. Some of them are Redhat, and some of them are Ubuntu. And on the homepage of MPICH, I saw that download sites of these two different operating systems are different, so will it be possible to set up a cluster with different operating system? And how to do it? The reason why I don't want to reinstall these servers is that there are too

Redis doesnt support master master replication. In the redis tutorial I can see that there is a configuration , with 6 nodes, 3 master, 3 slaves, Can any one tell me what is the aim of this configuration(slaves are for fail-over , what is the purpose of 3 master ?) My requirement is to reduce number of connection made from the app server to Redis . so I was looking for a way where I can point to multiple redis nodes , so if I create a key from redis node 1, I can delete that key from Redis node 2. Is it possible? First of all you can change the default configuration if you do little work in

I am trying to setup a CouchDB cluster with some Raspberry Pi for a edge computing project. But all I did until now wasn't successful. I don't get a cluster working correctly. This is what I did: I followed the setup guide from http://docs.couchdb.org/en/2.0.0/install/unix.html# in combination with: https://medium.com/linagora-engineering/setting-up-a-couchdb-2-cluster-on-centos-7-8cbf32ae619f#.eopseqi4h Installing the dependencies - worked without error ./configure - worked without error make release - worked without error Following the guide: Add couchdb user: adduser --system --no-create

I have coded a program in C using MPI wherein the struct variable is to be sent in a ring fashion to the processes and, based on the value received from that variable, the work for that particular process is assigned. The problem is I need to know how to to send a struct variable in the MPI_Send() function as it is giving INVALID DATATYPE at the runtime , Consider the following example struct info{ int ne, n, u, v, process, min, strip, mincost, b; } stat; MPI_Send(&stat,sizeof(stat),sizeof(struct info),1,2,MPI_COMM_WORLD); You have to do some operation before send a struct. I wrote the code

I am attempting to run Netlogo headlessly using linux in order to send a job to a cluster. I have never used linux before, but I am attempting to follow the directions here ( http://netlogo-users.18673.x6.nabble.com/Running-NetLogo-Headless-in-Behaviorspace-Sample-code-td4862232.html ). My script is: #!/bin/bash #SBATCH -N 1 #SBATCH -n 1 #SBATCH -c 7 java -Xmx1024m -Dfile.encoding=UTF-8 -cp /opt/shared/netlogo/5.3.1-64/app/NetLogo.jar \ org.nlogo.headless.main \ --model /cluster/home/rfuda01/UM_model.nlogo \ --experiment UM \ --table /cluster/home/rfuda01/UM_test.csv In the output file, I am

I've realized that when running Hadoop with Python code, either the mapper or reducer (not sure which) is sorting my output before it's printed out by reducer.py . Currently it seems to be sorted alphanumerically. I am wondering if there is a way to completely disable this. I would like the output of the program based off of the order in which it's printed from mapper.py . I've found answers in Java but none for Python. Would I need to modify mapper.py or perhaps the command line arguments? cabad You should read more on basic MapReduce concepts. Even though the sorting may be unnecessary in