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Questions tagged [cluster-computing]

A computer cluster is a set of connected systems that work together so that in many respects they can be viewed as a single system.

A computer cluster consists of a set of loosely connected computers that work together so that in many respects they can be viewed as a single system. Cluster management is centralized as opposed to a grid's non-central approach. (wikipedia).

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joining clusters using depth/breadth first search in python

I'm doing a small python project about finding clusters. I've read http://eddmann.com/posts/depth-first-search-and-breadth-first-search-in-python/ and used the depth first search in my code to generate the list of cluster, but now I want to do join…
Physicist
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How to add letters in google map markers A-Z using cluster marker

I have a map with 10 waypoints, I'm trying to add letters to specify the path, being "A" the starter point and "J" the ending point. How can I achieve that using clustermarkes, like the image below? this is my code so far: public class MapaViagem…
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Cluster Marker miscalculating when zoom out Android google maps

I'm trying to implement a cluster marker on my map, and it is behaving a little strange, first, it shows me the cluster marker with the right number of markers, but when I zoom out to join other markers it generates another cluster marker which I…
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Parallel Computing with Python on a queued cluster

There are lots of different modules for threading/parallelizing python. Dispy and pp/ParallelPython seem especially popular. It looks like these are all designed for a single interface (e.g. desktop) which has many cores/processors. Is there a…
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Socket between submit and execute hosts closed unexpectedly

I am attempting to run a SAS file on a cluster. The contents of the SAS file myprogram.sas are shown below: data a; input myvar1; myvar2 = myvar1 + 100 ; datalines; 0 1 2 3 4 5 ; proc…
Mark Miller
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Clustering SQL Server

Can we combine multiple installations of Microsoft SQL Server 2005 or 2008 to act as a single database cluster?
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How to see all jobs in a cluster using Spring Batch?

I'm trying to determine all the things I need to consider when deploying jobs to a clustered environment. I'm not concerned about parallel processing or other scaling things at the moment; I'm more interested in how I make everything act as if it…
Snekse
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Brand new to Cassandra, having trouble understanding replication topology

So I'm taking over our Cassandra cluster after the previous admin left so I'm busy trying to learn as much as I can about it. I'm going through all the documentation on Datastax's site as we're using their product. That said, on the replication…
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python on HPC cluster computer

I asked a question very close to this, but it wasn't answered and since then I hope I have learned to better ask the question. I was curious as to how run many jobs serially on a Cray XE6 machine. You usually qsub things with a ccmrun (for a serial…
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How to make groups for pdsh?

my pdsh can only read /etc/genders for grouping, but I dont know how to generate a genders file for it. I prefer to use dsh style group files(/etc/dsh/group/nodes) for it, but the module dshgroup can not be activated. I am in Debian 7: $ uname…
Cricket
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limits of number of files in a single directory in unix/linux using Python

is it bad to output many files to the same directory in unix/linux? I run thousands of jobs on a cluster and each outputs a file, to one directory. The upper bound here is around ~50,000 files. Can IO be limited in speed in light of this? If so,…
user248237
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Vert.x cluster Eventbus cross processes

Does any body have some info, links, pointer on how is cross process Eventbus communication is occurring. Per documentation I am concluding that multiple Vert.x (thus separate JVM processes) could be clustered on and communicate via Eventbus. …
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pacemaker corosync service ignored

Two Node cluster Node A , Node B . Service X running on Node A, Node B is DC. We are using stack corosync with Pacemaker. Failure Timeout is 10 sec . Target-Role is started . Events happens like this Node A sends event to Node B Service X is…
Sahil Aggarwal
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GridGain - programmatically opening nodes using SSH through Grid.startNodes API

I am using Grid.startNodes(java.util.Collection, java.util.Map, boolean, int, int) as defined here: http://gridgain.com/api/javadoc/org/gridgain/grid/Grid.html#startNodes(java.util.Collection, java.util.Map, boolean, int, int) Code I am…
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Sending process to different nodes with mpi4py

I have a function that I would like to be evaluated across multiple nodes in a cluster. I've gotten simple examples to run on our cluster using MPI4py, but was hoping to find a python package that makes things a little more user friendly (like…
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