A cluster consists of a set of connected computers that work together so that they can be viewed as a single system.

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ssh connection error “Permission denied (publickey)”

So I have been trying to build ssh connections between google cluster container containing 1 master node and 2 worker nodes. I have used ssh-keygen to generate key pairs for all three nodes, send the ...
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18 views

Submit multiple jobs simultaneously with qsub

I have a large number of jobs named sequentially as: job_01.txt job_02.txt job_03.txt ... job_20.txt Currently I just send each one separately using: qsub job_01.txt and so on for the rest. Is ...
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2answers
617 views

torque in Cluster [closed]

I am learning and have some questions about using PBS to submit jobs in a cluster. (1) If a job is parallelized by MPI and run by mpirun without using qsub, it cab be running on different nodes. So ...
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1answer
2k views

installing Grid Engine “cannot reach qmaster”

I want to install Grid Engine on my laptop. I am using Ubuntu 11.10 under VirtualBox 4.1.6. (The purpose of installing Grid Engine is not to compute anything, I just want a working Grid Engine ...
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1answer
139 views

Configuring a cluster

Our cluster is a linux cluster with Torque and Maui. I am reading tutorials online and find that the compilation is only on the head node, and after submitting the job by qsub, the other nodes are ...
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2k views

Jobs not running under Torque, installing Maui didn't help

So I just installed Torque on a small cluster we're setting up, and everything seemed to have gone quite smoothly. I have pbs_mon running on the compute nodes and pbs_server running on the head node, ...
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1answer
50 views

How to save job info (qstat) in SGE when submitting to qsub?

When submitting a job, I am able to provide qsub with the path for the standard output and the standard error. On the other side, while my job 12345 is running, I can access to extra info related to ...
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1answer
30 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
21 views

Does LSF io index report NFS io?

We use SONAS for our filesystem on our cluster and I have noticed that the load on SONAS does not necessarily correlate with the value of io on the cluster nodes when I run lsload -l. Is it possible ...
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1answer
409 views

PBS batch jobs - the qalter command

I've got a giant computation running on a Scientific Linux cluster. At present I have over 600 jobs parked in the queue, waiting for processor time, while a few are running. I'm trying to use the ...
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3answers
2k views

How do I temporarily take a node out from SGE (Sun Grid Engine)?

I'm having some trouble with a specific node. Until I resolve it, I don't want any jobs to run on ii. How can I temporarily take this node out of the nodes "pool"?
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61 views

Open MPI: max processes on a single node

I am using openMPI (ver 1.6.2) on a CentOS 6.6 cluster. I am trying to find ways to increase no. of processes on a single node using OpenMPI. Each node on my cluster has 20 cores. I trying with a ...
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29 views

Setup multi node cluster in ubuntu 12.04 using Cloudera?

I setup five virtual machines (Ubuntu 12.04 LTS ) using Virtual box, then I configured ssh password less authentications from master system to all slave systems. I have installed Cloudera CDH 5.3 in ...
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23 views

copy files and folders from cluster to desktop using PuTTY [duplicate]

I would like to copy files and subfolders from a cluster that runs pacman to a Windows desktop computer using PuTTY. First I would like to copy one specific file or subfolder as a test, for example ...
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0answers
13 views

Setting up a Microsoft Cluster in a virtual enviroument

I currently have three physical hosts (Host1, Host2, and Host3) that are running Win2K8 R2 and each using installed roles: File Services and Hyper-V and installed features: Failover Clustering). ...
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18 views

Is there a way to figure out the exact sector numbers of clusters “chkdsk” reports as bad?

Recently I run chkdsk after it finished it showed 4 clusters in size 4kb are bad, is there any way to know the sector numbers of them?
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1answer
9 views

Windows 2003 cluster not able to initiate

I am having trouble getting a service started in windows 2003. This is the cluster log, not able to deduce what is wrong either. Any help would be appreciated, tks. As it is with any log, it is ...
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1answer
20 views

When overwriting a file, how does this effect the filesystem NTFS?

Say a I have a secondary hard drive that has been defragged and optimized so that the data is a nice neat continuous block with no missing spaces/clusters. Like a solid brick wall. If I copy a file ...
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0answers
14 views

Create Cluster in Excel by different columns [duplicate]

I have 2 columns of data, and I want to automatically sort them in a cluster way, at Microsoft Excel. Column 1 Yes No Column 2 Platinum Gold Final Result: Yes Platinum Yes Gold No Platinum No ...
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76 views

Apache Spark cluster through a proxy?

This is more a speculative question to those with more networking / Apache Spark experience than me. My current setup: two 32GB, 4GHz Core i7 machines I'd love to tie into a Spark cluster. However, ...
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6answers
2k views

Good ways to restart all the computers in a remote cluster?

I have a cluster that I manage and from time to time I get emails from each node (and head node) begging to be restarted after an automatic upgrade. Currently, my best solution so far is a shell ...
2
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1answer
60 views

Attach to the same tmux session from different nodes of a cluster

I'm working on a computing cluster which has several hundreds of nodes. A load-balancing scheme picks an idle node to login to when ssh-ing into the cluster. As a result, it is very unlikely to ...
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6answers
12k views

How to link processing power of old computers together?

I'm sitting on 8 old computers of varied sorts that are more or less useless at this point for any other purpose really. Is there a way I could link their hardware or processing power or whatever ...
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42 views

After installing slurm 14.11,there is not any script in /etc//init.d/

After installing the slurm 14.11,there should be a a slurm script in /etc/init.d/,but I did not find it in the directory,what's the reason?
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61 views

Hardware errors too frequent or expected?

We have a small linux/Xeon cluster at work, and lately several hosts have rebooted on their own. The maintenance team saw errors in /var/log/mcelog and replaced the memory in one host today. I decided ...
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2answers
279 views

Safe to use a laptop as a non-stop number cruncher?

I have an Intel Core Duo laptop with 1GB RAM running Ubuntu Linux. I'd like to make it a node in a cluster and use it to crunch numbers non-stop (100% CPU work). Someone mentioned to me that in ...
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2k views

Sharing RAM resources between 2 or more computers

I know there was a somewhat similar question before: How to share CPU or RAM? But, let me just specify it a little more... When Microsoft Windows requires more RAM capacity than available it uses a ...
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14 views

Cluster 2 physical PCs using Hyper-V 2012

I recently purchased 2 identical PCs for development purposes, we are running Hyper-V 2012 and I just wanted to know if there were any guides or similar that show how I could cluster both PCs ...
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21 views

Batch WinRAR Cluster Error

I've recently have had a problem with a small project of a batch cluster WinRAR cracker of numeric. I have a master file that controls all the variables for the clusters and have 8 clusters. I have ...
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22 views

generic remote process accelerator

is there a solution to accelerate a local process using remote PC CPUs (and/or GPU)? My ideal solution should: work without the need to rewrite the app to use a specific library; work on ...
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55 views

How to set up a productive and flexible Linux cluster?

I have 7 old computers that are a few years old. I want to cluster them together to create a linux cluster that will run general purpose software(not cluster specific). Is there any software that can ...
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2answers
333 views

How to mount 7 desktop pc's into a 7u rack? [closed]

I am clustering 7 desktop computers and would like to put them in a rack. I have an 8U rack and 1U will be taken up by the ethernet switch. I will take out the optical drives. I plan on putting each ...
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54 views

Create a decentralized file server out of multiple desktops with Windows 7 OS

I have a bunch of desktops with Windows 7 OS and some unused hard disk space on each one that I would like to connect together and use as a big file server that can be seen by all the desktops. I want ...
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1answer
617 views

How to determine the physical location of data on a disc?

Does anybody know of a way to find out where, physically on a CD or DVD a given piece of data would be located? I am trying to watch a DVD at the moment, and am about half-way through, but it keeps ...
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41 views

recover deleted files in linux cluster

I just deleted some files that were very critical to my project on a linux cluster .I was wondering if there is a specific way to recover them. This is very critical and I would appreciate a detailed ...
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1answer
88 views

OS partition has 512 bytes clusters, should I convert to 4k?

I made a mistake and formatted the OS partition with 512 bytes cluster size, thinking that this will save a lot of space when storing small files (That was a long time ago, I didn't know that it will ...
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1answer
217 views

How do I display directories in colour on remote systems over ssh via Terminal?

When I do ls in Terminal.app, I see that directories on my local system are in colour. However, when I connect to a remote cluster via ssh, ls output is no longer coloured. Is there a way to have ls ...
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1answer
290 views

Create a GPFS Administrative account

i try to install GPFS on Windows Server 2008 R2, after successfully install GPFS i want to use the GPFS Command Prompt. But when i type in some Commands there comes a error: "mmstartup cannot execute ...
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2answers
125 views

CNAME to shared IP on a cluster

I'm trying to set a CNAME record (www) at ISP-A to forward to a subdomain at ISP-B. the domain/website at ISP-A works flawlessly at ISP-A, the website at the subdomain at ISP-B works also good. but ...
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1answer
294 views

virtual machine replication between two separated Hyper-v clusters

I have two identical hyper-v cluster configurations. Here is the configuration: 2 hyper-v servers in cluster with shared via fiber channel storage. There is a 10 Gbit ethernet between these ...
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2answers
69 views

Is there a way to build cluster machine that behaves like a single PC? [closed]

Is there some way to build a cluster from several desktops in such a way, that it can run an unprepared application and be seen as just a multicore CPU? I understand it will be a lot slower than ...
2
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4answers
130 views

Manage a few Linux servers at once

I have a small cluster that consists of a few Linux nodes. There's a shared NFS, and I have the same user account with shared SSH keys on all nodes, but other than that each node has it's-own file ...
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49 views

ZSH and Passwordless access with SSH in a shared home environment

I have a small cluster with some nodes which share their home folder through NFS. I allow passwordless SSH access to the users with this script: if [[ -e $homeDirs/$username/.ssh/id_rsa.pub ]]; then ...
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0answers
163 views

Setting up an Ubuntu Linux scalable web video cluster

I'm in the process of setting up what I hope will be a robust and scalable video processing cluster for a website I'm creating. Currently, I am processing video uploads with FFMPEG on the same web ...
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0answers
385 views

Cannot copy over 7MB file to Samba cluster on Centos 6.5

I have followed these instructions (with lots of updates since it's old) to get working two nodes Samba cluster in my VirtualBox lab. It's almost done, but I experience strange issue and does not know ...
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2answers
1k views

Difference between Compute Node and Compute Cluster [closed]

I have to give a presentation on Super Computing and I came across this pdf http://yuva.cdac.in/YuvaII/YUVA_2%20leaflet.pdf. As mentioned in page 2 what is the difference between Computer Node and ...
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25 views

Fast removal of millions of files on a remote compute cluster [duplicate]

I would like to know what's the fastest way to remove massive number of files on a remote compute cluster (linux). I have 1000 folders to delete permanently - each containing about 200k files with ...
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335 views

Beowulf cluster possible?

I don't really know where to find people who have experience in building computer clusters, so I thought maybe someone from here might answer my question. Basically I have two machines at my ...
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1answer
54 views

How can I use computers with RJ-11 ports in an Ethernet network?

In my school are many really old computers with Pentium 3 processors and Windows 95. I'd like to make a cluster of them. Those computers have RJ-11 ports, not RJ-45 and I don't know if I can use an ...
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1answer
219 views

So I found and marked some bad clusters—now what?

I don't know exactly why, but hard drive failure happens to me quite often. This time around, three out of my eight drives failed almost at the same time (two HDDs and one SSD). I still don't know ...