discusion related to cluster mecanism.

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2
votes
2answers
872 views

How can I mount vxfs FS to two or more Solaris servers?

I want to have two Solaris servers share the same SAN vxfs Filesystem. Though at a time just one would be accessing the share. This is to allow for a quick failover in case the primary server ...
2
votes
1answer
149 views

mpd daemon prematurely ending jobs

I am a little out of my depth here so bear with me. I am trying to configure mpirun and mpiexec to run software called Materials Studio on a 1 node, 2 processor, 12 core cluster. The submission scheme ...
1
vote
1answer
46 views

Oracle 11gR2 grid silent installation: error for privateinterconnects

I am installing Oracle grid 11gR2 using silent install with response file. I am getting error after "Collecting interface information for node 1" in logs. I have a feeling that this could be due to ...
1
vote
1answer
239 views

HAProxy should not forward an incoming request to down instance

In my scenario, I have 2 servers, both are communicating with HAProxy. When a request comes in, HAProxy splits the request and sends it to both servers, following a round robin method. If in any case ...
9
votes
2answers
1k views

How to build a personnal cluster?

I have a debian server running some services (mail, web, git, mysql...). But it is alone, meaning that if it breaks, I have to repair it to access my services. I'd like to put a second server so that ...
0
votes
3answers
2k views

Kill nohup command on cluster

Last night I launched a command via nohup on a cluster and then closed the connection. Today I would like to kill this job (I know it's still running because output is being generated in an output ...
2
votes
2answers
845 views

comm fails on bash variable input

I have a script that's supposed to get the list of files of two directories, get differences and execute some code for certain files. These are the commands to get the file lists: list_in=$(find ...
6
votes
1answer
638 views

Running parallel bash jobs on a HPC cluster using GNU parallel

On an HPC cluster I am trying to run multiple bash scripts (permute2.sh) from 1 bash script using GNU parallel, however it doesn't complete every job. It randomly completes one job, while it is stuck ...
8
votes
3answers
3k views

How to set up “poor man's” Linux desktop cluster?

There are several small Linux/Android devices on the market with 1 GHz ARM processor, 512 MByte RAM and cca. 4 Gbyte storage for $35-$40. If I buy 5 pcs, it's only around $200. Let's say, we have ...
3
votes
0answers
239 views

Should I investigate Rocks or Ubuntu/Mosix for building a cluster?

I work at a college doing system administration. Someone in their lab is looking to build a cluster for running complex Octave and C++ projects. They have brand new modern machines. My question is ...
1
vote
1answer
2k views

EMC storage + powercf command + powerpath

When I run powercf -q on my Solaris machine, what changes does this command do on the EMC storage, or on Solaris file system? From manual page: DESCRIPTION During system boot on Solaris hosts, ...
4
votes
3answers
3k views

On Ubuntu Linux, is it normal for mandb to run continuously (apparently in the background)?

I have access to a Ubuntu Linux node at my institution. The nodes are shared among the group, but typically I am the only person who uses this particular node. I am running a calculation in parallel ...
3
votes
1answer
7k views

How do I download and launch a JNLP file in CentOS?

I'm using Amazon's GPU cluster to experiment with some HPC java code on CentOS. The Java application is in JNLP format and has a GUI. I've followed Amazon's getting started video, but I'm not ...
0
votes
1answer
206 views

Samba on a Beowulf Cluster

Is this possible? I have only been able to locate resources related to running scientific applications. Any resources would be helpful. Regards
1
vote
0answers
174 views

Getting from proficient to expert [closed]

I've got my vacation coming in and thought I might use that for something useful. Essentially, I've been a Linux user since around 1995 when I installed Slackware 2.0 on my computer and have been ...
27
votes
1answer
30k views

How does tcp-keepalive work in ssh?

I am trying to code a shell-script that uses a ssh-connection for doing "heartbeats". I want to terminate the client- and server-side of that connection after a certain timeout (after the connection ...
1
vote
4answers
2k views

How to find which machines are idle on a cluster of many nodes

I run measurements on a cluster consisting of 32 nodes/machines. I do not require all nodes, only 4, for example. The problem is most of the time, the nodes are busy with other people running their ...
4
votes
1answer
218 views

Multi-machine tool in the spirit of moreutils' `parallel`?

parallel from moreutils is a great tool for, among other things, distributing m independent tasks evenly over n CPUs. Does anybody know of a tool that accomplishes the same thing for multiple ...
0
votes
0answers
142 views

Job IDs and their meaning/reference

Using Red Hat, I sent few jobs to a cluster and got "job IDs" in return. Using qstat I can see only one is running, one was canceled and the rest are still in the queue. I wrote something like this: ...
9
votes
5answers
519 views

Directory sync with automatic peer discovery

I'm working with a cluster of Linux servers sitting behind the Amazon cloud autoscaling feature (documentation). There are files that accumulate on each server, they are cache files for the ...
7
votes
2answers
2k views

Small Distributed Computing Cluster

I'm a high school student trying to build a linux cluster for a project (I have a bunch of decent computers slated for re-image this summer, so the tech department basically says as long as I don't ...
1
vote
2answers
2k views

Clustering Servers to run one vm

I am looking at clustering about five machines and I wanted to get some opinions about what is the best way to go about it. I'm wanting to run one VM over the five machines, firstly I want to ask, 1: ...
7
votes
2answers
336 views

Straightforward Linux Clustering

We have many unused PC machines and we would like to use them to set up educational lab for high performance computing applications. Which Linux distribution is the most convenient to set up and easy ...