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.
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10 views
Nodejs Clustering and expressjs sessions
I'm trying to build nodejs application which will take advantage of multicore machines ( a.k.a. clustering ) and I got a question about sessions. My code looks like this:
var cluster = ...
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1answer
7 views
Linking different schemas from different mysql servers into only one mysql server so he can manage the queries
I have 5 different schemas, eventually i want to separate them into different servers for specific RAM and CPU assignment depending on the load. How can i configure so i can show a schema from a ...
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0answers
8 views
SQL Server 2008 R2 cluster installation error [migrated]
I was trying to install SQL Server Cluster (Launch wiard to install single node SQL Server 2008 R2 faliover cluster) .. The setup checks displayed no error and the installation started after all the ...
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0answers
11 views
Hadoop Multi-Node Cluster Set-up Basic Questions
I'm trying to set up a multi-node Apache Hadoop cluster. I'm following their tutorial here: http://hadoop.apache.org/docs/stable/cluster_setup.html. I've set up single-node Hadoop set-ups on each ...
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0answers
19 views
infinite wait during openMPI run on a cluster of servers?
I have successfully set up the password less ssh between the servers and my computer.
There is a simple openMPI program which is running well on the single computer.
But ,unfortunately when i am ...
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3answers
18 views
Can we share worklight server Install Directory for all the cluster nodes
Planning to install Worklight on a cluster. Right now we installed Worklight Directory on all nodes in the same folder but Can we install the Worklight Server Directory on shared folder and refer to ...
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0answers
19 views
Lock.tryLock() in suspecting node are hanging forever after false Failure Detection
We are using jgroups-3.0.3.Final as a cluster wide locking implementation in a cluster of two nodes.
Our JGroups settings(simplified) is as follows:
<config xmlns="urn:org:jgroups"
...
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1answer
43 views
Parallel R on a Windows cluster
I've got a Windows HPC Server running with some nodes in the backend. I would like to run Parallel R using multiple nodes from the backend. I think Parallel R might be using SNOW on Windows, but not ...
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24 views
have one worker emit a message
I'm trying to create a cluster application with node.js.
So far I'm pretty fine with my setup, and I can answer requests and emit messages to clients on different worker threads.
Now the tricky ...
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0answers
24 views
mahout not creating input clusters when running kmeans
I am trying to get the hang of clustering data. I clustered the reuter dataset's files using example instructions and after some trial and error it worked alright. Here is the command I used to make ...
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1answer
40 views
Setting up a 2-node Hadoop cluster on VM
I'm unable to open namenode:50070, however, namenode:50030 works fine.
I've set up a 2 node cluster on VirtualBox. The host OS is windows 7, and I have 2 guests that are both ubuntu. 1 slave and 1 ...
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0answers
23 views
JBoss 7/EAP6.1 deploy exploded ear in a cluster
I have an exploded ear (ejb3 and war).
First, I successfully deployed it on 1 jboss EAP 6.1 in standalone mode.
Now, I try to create a cluster from 2 JBoss EAP 6.1, each in standalone mode.
I'm ...
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1answer
57 views
Socket switch over in clustered environment
On a web-app running on Jboss, there is a TCP Socket connection that we use to achieve heartbeat for a session (rtsp). Till now it was doing a Client Socket binding:-
Socket client = new ...
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0answers
8 views
how to set up scalable server cluster? [closed]
I have six quad-core PCs and I want to set up a scalable server cluster of this six machine in my lab to study / develop scalable applications. This is a test environment I want to create /bringup as ...
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0answers
22 views
openMPI on cluster using hostfile
My hostfile looks like this :
# The Hostfile for Open MPI
# The master node, 'slots=8' is used because it has 8 processors.
pcys33.grm.polymtl.ca slots=8
# The following are the slave nodes
...
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0answers
19 views
Why would Galera nodes remain “Disconnected”?
I'm trying to set up a simple 3 node Galera/MySQL cluster, but the wsrep_cluster_size stays "0" and the wsrep_cluster_status stays "Disconnected" on all 3 nodes no matter what I do.
I have installed ...
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0answers
7 views
Backup and restore Zookeeper database
I would like to significantly expand on the question that had been asked about two years ago in this thread: How do you backup Zookeeper?
How do you not only backup Zookeeper database, but more ...
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1answer
21 views
Setting up a Spark cluster on Windows machines
I am trying to set up a Spark cluster on Windows machines.
The way to go here is using the Standalone mode, right?
What are the concrete disadvantages of not using Mesos or YARN? And how much pain ...
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0answers
29 views
Octave Parallel Code Example
Can anyone provide an example octave code to submit to the cluster assuming the parallel package for octave is installed in the cluster? What I am saying, do I just use parfor as in Matlab parallel ...
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0answers
25 views
Have anyone did some programming on heterogeneous supercomputer? [closed]
If there is a super computer built by blades, and each of its computing blades consist of 2 CPUs and 2 GPUs, how can MPI request computing resource from it?
I mean, in PBS, each node is a phyiscal ...
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0answers
25 views
SocketTimeoutException when running hadoop distcp -update between clusters
I'm using hadoop distcp -update to copy directory from one HDFS cluster to different one.
Sometime (pretty often) I get this kind of exception:
13/07/03 00:20:03 INFO tools.DistCp: ...
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0answers
22 views
Fuse ESB 7 Cluster issue [closed]
I have tried to cluster the fuse esb application based on osgi way using the "http://fusesource.com/docs/esbent/7.0/cxf_endpoints/ESBMavenOSGiPrjSetup.html" documentation.
I am getting the below ...
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1answer
11 views
Considerations when porting a MS VC++ program (single machine) to a rocks cluster
I am trying to port a MS VC++ program to run on a rocks cluster! I am not very good with linux but I am eager to learn and I imagine porting it wouldn't be an impossible task for me. However, I do not ...
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0answers
5 views
Does anybody know resource manager OAR?
I'm a grad student and in our lab we are planning to deploy a grid of off the shelf PCs. That being said, we are in the process of choosing the resource manager. One of my colleagues suggested this: ...
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1answer
37 views
Sharing object between Node.js server with memcached / couchcase cluster
I was looking for a way to share object in several nodes cluster, and after a bit of research I thought it would be best using redis pub/sub. Then, I saw that redis doesn't support cluster yet, which ...
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1answer
25 views
Clustering a scheduled task on Windows Server 2008 R2
I have a two-node cluster running Windows Server 2008 R2. It is essentially an active/passive cluster for SQL Server.
I have set up a scheduled task on the current active node. I want to set up ...
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0answers
24 views
How do I configure and reboot an HDInsight cluster running on Azure?
Specifically, I want to change the maximum number of mappers and the maximum number of reducers for each node in an HDInsight cluster running on Microsoft Azure.
Using remote desktop, I logged in to ...
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1answer
34 views
Apache Camel as a war and load balancing
We plan to use Camel for making integration between some external systems (ftp, soap ws, rest ws).
We will probably use the Spring configuration (Camel context XML) and because the quantity of ...
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0answers
6 views
Problems with Display after installing Rocks Cluster
I am new to the whole network clustering thing. I am trying to install (RockClusters) Emerald Boa on a laptop of mine to act as a temporary front node. However, when I try and do so, the installation ...
-1
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0answers
16 views
Want to parallelize a computation to run in a supercomputing facility - recommended reference? [closed]
I am doing a research using C++, python, and CPLEX, and for large inputs, the program takes too much resources to run in my computer.
Now our team is considering running this program(essentially ...
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0answers
10 views
Getting 404 error while request is redirected across multiple clusters
Our app is deployed on WLS 10.3 clustered environment.
we have an automated process which will checks the application availability. Today I have an issue that, We got initial HTTP Request to a cluster ...
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0answers
52 views
Continuous processing in Spring framework, ideal performance
I am working on distributed application where slave node do following :
slave node asks master if there’s some work to do, if yes it gets some tasks from master
slave node triggers multiple threads ...
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1answer
15 views
How to make a n application 'high availability' [closed]
One of the jargon associated with enterprise systems is 'high availability' systems. I understand that a basic way to have a high availability system is to deploy your application as a cluster so that ...
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1answer
37 views
How to set up doSNOW and SOCK cluster with Torque/MOAB scheduler?
In continuation of this question (http://stackoverflow.com/questions/17222942/allow-foreach-workers-to-register-and-distribute-sub-tasks-to-other-workers), what is a best practice to connect doSNOW ...
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0answers
13 views
Find failed Quartz Jobs in Cluster environment
My Problem is to find if a job is still running in a cluster environment. Running means to check if the thread is still active because in any failure the thread may crashed but the job status is not ...
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0answers
22 views
hadoop in a shared file system
I want to run hadoop to process big files, but server machines are clustered and share a file system. So, even if I log in different machines, I have same file directories and files.
In this case, I ...
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1answer
13 views
Two tomcat instances with different multicast addresses are grouped when using Jrockit
I am trying to setup tomcat cluster upon Jrockit 1.6.0_45-b06, and faced with a problem.
It seems that Jrockit does not use Multicast address to group, I have setup 2 instances of tomcat in the same ...
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1answer
21 views
How to know the PBS batch job submit time inside the script being excuted?
I'm using the PBS qsub to run a script on a cluster that must output a report file named with the batch job submit time.
The batch job submit time is the time it joins the PBS batch job que.
I ...
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1answer
28 views
MassTransit with RabbitMQ Cluster connecting issue
I ran into this problem thought maybe someone can help me out.
So I added one cluster node to my RabbitMQ server.
Now I want to connect to the server on my client. I want MassTransit to connect to ...
2
votes
1answer
64 views
Allow foreach workers to register and distribute sub-tasks to other workers
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 ...
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0answers
17 views
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1answer
26 views
Clustering Infinispan DefaultCache with RemoteCache
I am currently using TomcatInfinispanSessionManager. I have two machines, both are configured with TomcatInfinispanSessionManager, forming a cluster. When a request comes to 1st Machine, a SessionID ...
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0answers
21 views
Shards / Replicas settings for high availability
We have java application with embedded Elasticsearch in a cluster of 14 nodes. All the data resides in a central database, and they are indexed in elasticsearch for querying. A full reindex can be ...
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2answers
42 views
Suggest a proper solution for a distributed database [closed]
Well I just want to hear your opinion guys. I know there are a lot of great professionals.
We are in a process of developing a distributed database. It will contain around 50-100 mlns of rows (or ...
1
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0answers
15 views
Duplicate logs “session expired” in tomcat cluster
I have two nodes Tomtsat 7. As a manager used org.apache.catalina.ha.session.DeltaManager. On each node runs HttpSessionListenerImpl. In the method sessionDestroyed logged some data session. Can I ...
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1answer
36 views
Multiple WSO2 ESB nodes clustered without Greg
Is it possible that 2 WSO2 ESB nodes points to external datastore and sharing deployed artifacts without having WSO2 GReg product in place ?
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1answer
27 views
Pluggable cluster management system
Problem:
We have a cluster of servers, running on Java (Tomcat). Each server exposes a lot of information via JMX. It takes a lot of time to go through JMX to make sure the cluster is in valid state.
...
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0answers
61 views
why password less ssh not working?
I connected 3 data nodes(in all these data nodes pass-wordless is working fine) in my cluster which are working fine but when i try to connect another data node pass-wordless ssh not working in fourth ...
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0answers
10 views
Is a database server necessary if I have a server cluster with intra-cluster replication?
I am designing a network whose backend is a server cluster which logs incoming data while transmitting it to client machines in real-time. The data will be complex, but can be stored locally on the ...
1
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2answers
24 views
How can scipy.weave.inline be used in a MPI-enabled application on a cluster?
If scipy.weave.inline is called inside a massive parallel MPI-enabled application that is run on a cluster with a home-directory that is common to all nodes, every instance accesses the same catalog ...
