cluster

Nodes not talking

I am using Ubuntu 9 and I start two nodes with: erl -name node1 -setcookie demo and erl -name node2 -setcookie demo yet when I run "nodes()" the nodes do not see each other and it returns an empty list. Anyone know why? ...

Test MPI on a cluster

Hi, I am learning OpenMPI on a cluster. Here is my first example. I expect the output would show response from different nodes, but they all respond from the same node node062. I just wonder why and how I can actually get report from different nodes to show MPI actually is distributing processes to different nodes? Thanks and regards!...

Glassfish Clustering architecture and Node Agents

I am going to be creating an application that will be highly distributed. There will be several "agents" each agent is a source of events, from external devices, ftp or filesystem. These agents will be deployed on seporate machines, close to the hardware source that will create the event. These agents will report back events to the ce...

How do I send a module to an Erlang node?

I have several nodes running in an erlang cluster, each using the same magic cookie and trusted by each other. I want to have one master node send code and modules to the other nodes. How can I do this? ...

gsh - Global Shell: Where do you put the shared keys, password?

I'm trying to use the gsh command on ubuntu to do some embarrassingly parallel stuff. I've made an /etc/ghosts file containing all the IP addresses for the hosts, and each host has an account that I created just for "cluster" purposes. However, when I try a command such as, $ gsh -l cluster ok 'echo $host' I get in return two errors...

How can I install Riak on several remote nodes using hot code loading?

I have been learning Riak on a single machine and have access to a cluster of Erlang nodes (on Ubuntu 9). Using remote code loading how do I install Riak onto all the remote nodes? For example, imagine I have a cluster of Erlang nodes. One of the nodes has Riak installed. Can I do something like nl(riak) to install Riak onto the other n...

Is Erlang the C of the clustered computing world?

Erlang seems to be very low level and performant on networks, but does not have a very rich type system or many of the things that other functional languages offer, so it seems to me that it will become the lowest level development language for clustered programming, until something else comes along and offers a decent clustered VM AND h...

Excel process not ending in Cluster environment

When we try to close excel object, it fails to close to cluster environment. The same is working fine in QA and UAT environment. public bool KillExcelProcess() { try { object misValue = System.Reflection.Missing.Value; wbObj.Save(); wbObj.Close(true, misValue, misValue); ...

Distributed Computing in C++ ?

Hi everyone, I would like to know what tools, frameworks or libraries you would use, to spread your C++ application across multiple machines. Im searching for a way to create a framework/environment, in which a master-server can hand many seperated Jobs to different seperated clients, who give back their result on a special Job. The res...

Cluster Heat Maps Library

Is there any Library in Java that has Cluster Heat Maps already implemented ? Can I use that Library in my code to generate a cluster heat map ? I am looking to plot cluster heat maps from gene expression data that I have. ...

Is is posible too run a mysql-cluster management node on a different OS?

Is it posible too run the Management node of the mysql-cluster on a different OS ( linux ) and 2-3 cluster servers on windows hosts? ...

Finding the spread of each cluster from Kmeans

Hello, I'm trying to detect how well an input vector fits a given cluster centre. I can find the best match quite easily (the centre with the minimum euclidean distance to the input vector is the best), however, I now need to work how good a match that is. To do this I need to find the spread (standard deviation?) of the vectors which ...

SunGridEngine, Condor, Torque as Resource Managers for PVM

Anyone have any idea which Resource manager is good for PVM? Or should I not have used PVM and instead relied on MPI (or any version of it, such as MPICH-2 [are there any other ones that are better?]). Main reason for using PVM was because the person before me who started this project assumed the use of PVM. However, now that this projec...

Condor job using DAG with some jobs needing to run the same host

I have a computation task which is split in several individual program executions, with dependencies. I'm using Condor 7 as task scheduler (with the Vanilla Universe, due do constraints on the programs beyond my reach, so no checkpointing is involved), so DAG looks like a natural solution. However some of the programs need to run on the ...

Biztalk Cluster Servers

Hi, we used to have 1 biztalk 2006R2 32bit server. We recently upgraded it to Enterprise. But because our traffic size we didn't have enough power and memory with only one. So we also recently installed a second biztalk server, a 2006R2 64-bit, and we put them in a shared cluster. Since then a problem arose, actually two but I'm guessin...

How to read individual sectors/clusters using DeviceIoControl() in Windows?

I dropped my laptop while Windows was preparing to hibernate and as a result, I got a head crash on the hard drive. (Teaches me to get a hard drive and/or laptop with a freefall sensor next time around.) Anyway, running SpinRite to try to recover the data has resulted in all the spare sectors on the disk to all be all used up for all the...

Clustered Graphs Visualization Techniques

I need to visualize a relatively large graph (6K nodes, 8K edges) that has the following properties: Distinct Clusters. Approximately 50-100 Nodes per cluster and moderate interconnectivity at the cluster level Minimal (5-10 inter-cluster edges per cluster) interconnectivity between clusters Let global edge overlap = The edge overlap...

Analogs of Intel's Cluster OpenMP

Hello Are there analogs of Intel Cluster OpenMP? This library simulates shared-memory machine (like SMP or NUMA) while running on distributed memory machine (like Ethernet-connected cluster of PC's). This library allows to start openmp programs directly on cluster. ...

script unable to find directories/files when running from qsub cluster script

I'm calling several unix commands and python on a python script from a qsub shell script, meant to run on a cluster. The trouble is that when the script executes, something seems to go awry in the shell, so that directories and files that exist are not found. For example, in the .out output files of qsub I see the following errors: cd...

MySQL cluster questions

Hi! I've read much of the MySQL Cluster docs and some tutorials yet I still have some things not clear, and the major of them right now are: When a data node restarts (crash and goes up again) will it's data still be available? Updates/Additions will work as usual? Will it "sync"? Does a cluster work faster than standalone? In particu...