discusion related to cluster mecanism.

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350 views

Two Nodes CentOS 7 Cluster clvmd

I am trying to set up two nodes CentOS 7 cluster with clvmd. I added dlmd and clvmd as clone resources in cluster using pcs command. When both nodes are up, dlmd and clvmd can start properly. But ...
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1answer
118 views

Linux run every program on cluster

I am playing around with Open MPI and I must say I love the concept of running programs on the cluster. The problem I am facing with Open MPI is that a specific program must support this way of ...
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97 views

Problems with kerrighed

I heard about kerrighed and i want to use it for rendering with blender because it is a single system image. I tried to install it over pxe like the installation guide from kerrighed.org says. The ...
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1answer
85 views

reduce bandwidth consumption from downloading yum updates

I have several machines (7) running fedora and would like to reduce the amount of external bandwidth I am consuming. I see that there were several attempts to setup mirrors, but those projects seem ...
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1answer
265 views

Linux Cluster - SFTP between failed over Servers

I have a strange problem with our cluster solution on Linux. We have the following set-up in our environment. Each of these servers hosts our enterprise application. Server1 Server2 Server3 ...
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1answer
210 views

mysql high availablity for LAMP application (ubuntu 14.04)

im trying to achieve HIGH Availability (HA) for a LAMP application(News Portal website) which might be of interest to many unfamiliar users.For files im using Glusterfs (replica) for redundancy ...
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0answers
112 views

XFS over iSCSI share with cluster; will fencing cause data corruption/loss?

When using XFS on iSCSI share, where HA is enabled, nodes may be fenced by cluster. Will this result in data loss / corruption / etc. ?
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25 views

centos cluster set core/each_program

I'm using unix server (OS: centos5) and I'm using several clusters. Some clusters have 8 cores, other are 24 cores and etc. I execute jobs using this command. qsub -q cluster_name -d $PWD ...
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0answers
246 views

pacemaker hangs while stopping

I have recently installed pacemaker and corosync for managin a virtual IP. The thing is that when I want to stop a resource (Virtual IP) on all the nodes, the stop command hangs. [root@isis ~]# sudo ...
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1answer
83 views

Cluster Lock Manager without TCP/IP

I have 2 linux sharing same SAN disk LUN. There are many cluster files systems to manage lock/unlock. But all of them are using a seperate TCP/IP comminication. But I need a cluster lock manager ...
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0answers
710 views

About mem and vmem

I am working with a cluster machine running under linux. I have a shell script that uses mpirun to submit my jobs to the cluster machine. In that same script, I can choose the number of nodes that ...
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1answer
97 views

Is there a way to achieve context-dependent path names (CDPN) on NFS?

In my GFS clusters I use the CDPN feature to have separate chrooted /dev/log directories on separate cluster nodes: /home/ftpuser/foo: lrwxrwxrwx 1 root root 18 Sep 26 2010 dev -> ...
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116 views

Microcomputer cluster for stress testing

I'm looking to build a microcomputer cluster at work for stress testing one of our applications, and while I have a little financial leeway, I would like to keep the cost low and the computing ...
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1answer
137 views

Powerful Workstation

I heard about ILM's (Industrial Light and Magic) workstations on which they create models and scenes for a lot of different movies. They have workstations with more than 1024 GB of ram and a lot of ...
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2answers
95 views

Gather job usage information on cluster

I am running simulations on a linux cluster shared by hundreds of other users. There is a job scheduler installed on the cluster that determines who runs where, and one of the scheduler commands ...
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1answer
2k views

How do I distribute a large download over multiple computers?

I need to download a large file (1GB). I also have access to multiple computers running Linux, but each is limited to a 50kB/s download speed by an admin policy. How do I distribute downloading this ...
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1answer
77 views

How much space for /home on a hadoop cluster? [closed]

What is a reasonable size to provide for a /home partition for 100 users on a hadoop cluster? Assume that a landing zone has been provided to store files/data for ingestion into the cluster, so the ...
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1answer
340 views

Running shell script on cluster in parralel

I thought dsh(Distributed Shel) will be a good option but when i ran my shell script across my nodes, I didnt get expected output, dsh -aM -c bash /home/cloudera/bash_script.sh server2@x.x.x.110: ...
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1answer
241 views

SED and PDSH: adding a line to a file on a slave node in a cluster

I am trying to add a new line containing GATEWAY=10.0.10.1 to the /etc/sysconfig/network file on each of 32 slave nodes in a cluster. I read this post on how to insert a line with sed. This works for ...
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1answer
111 views

Configuration management, shared files, etc with a Laptop

I have a couple computers sitting around in my home network. They all run the same version of Ubuntu, and I would like to unify their configuration to some extent. At my university, you can log in to ...
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3answers
696 views

Multiple tar processes writing to the same archive file at once

I am running many tasks on a Linux cluster. Each task creates many output files. When all tasks are finished, I run something like tar cf foo.tar output_files/to create a tar archive. This is a very ...
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0answers
146 views

Takeover delay in Heartbeat HA cluster

I have set up a heartbeat HA two node cluster. And both of server have same configuration of ha.cf #cat /etc/ha.cf logfile /var/log/ha-log autojoin none bcast eth1 warntime 20ms deadtime 40ms ...
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1answer
33 views

Is it possible to install RHEV on el6 clustered computer

Is it possible to use Linux (el6) clustered computer can be used as a hypervisor for RHEV 3.3/Ovirt 3.3? Cause, we can not combine RAM/CPU from two or more hypervisores to be considered as a one ...
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1answer
6k views

usr/bin/xterm Xt error: Can't open display: /usr/bin/xterm: DISPLAY is not set?

I'm trying to submit a job to a school server (HPC) with: #!/bin/bash #$ -S /bin/bash #$ -cwd #$ -o ./out_$JOB_ID.txt #$ -e ./err_$JOB_ID.txt #$ -notify #$ -pe orte 1 date pwd ...
3
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1answer
67 views

NFS file with same name but different content depending on host

I have cluster using NFS with a program myprogram which writes to a fixed location, e.g. /home/sharedfs/somedir/somefile.txt. This means that if you run myprogram from each node, they all write to the ...
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1answer
91 views

CentOS VM 3972 Segmentation Fault

I'm trying to install MATLAB 2012 on CentOS 5.8 running on a VM cluster. I was able to mount the .iso file, but when I run ./install, it was unable to write to /tmp giving the error, "no space on ...
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0answers
36 views

heartbeat stops after reviving primary node

I followed these steps correctly, everything worked well before I have revived heartbeat on node01 "at the last steps of the tutorial" when I hit /etc/init.d/heartbeat start it started correctly but ...
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1answer
376 views

What software should I use to create a HPC (High performance compute) cluster with CentOS 6.5 VMs locally?

I've read about Torque, Slurm resource managers and Maui, Open Grid scheduler, Sonf of Grid Engine but I do not know which is more appropriate to use in a local environment? I've also read that I need ...
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1answer
649 views

Fencing VM nodes

I'm using VMware Workstation as my hypervisor. I want to create a cluster with two nodes and a sharing storage with FreeNAS. My questions are around fencing. Is it possible to do it in this case? ...
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1answer
54 views

Will having dozens of inactive logins hurt performance

I work on a cluster shared with ~20 users, many of them operating remotely. It's quite common to open the login node, type users and see ~100 users listed, mostly the same user logged in multiple ...
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1answer
2k views

what is the difference between qsub and ./

Can anyone tell me the difference between the following ways of submitting a script: $ qsub script_name.sh and ./script_name.sh What are the differences between the above two ways of submitting ...
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6answers
18k views

NFS Automatic Fail-over or Load-balanced or Clustering?

I've been using NFS (and it is the only one i know well in Network Files) for a few years. But still can not able to find out .. How to make NFS Servers in Clustered Design (or Load-balanced?) Or at ...
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2answers
296 views

can I tell to useradd to execute a script? Maybe in /etc/default/useradd?

There are plenty of people that already answered to the question "how to execute useradd properly in a script?" My question is: "is it possible to tell to useradd to execute one script when it is ...
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1answer
2k views

Recommendations for replacing a GFS cluster?

I have a couple of CentOS GFS-clusters (GFS as in Global File System) using a shared disk in a Fibre Channel SAN. They are mature now, and the time has come to start planning for their replacement. ...
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0answers
635 views

Corosync/Pacemaker cluster loss of synchronization

I'm facing a problem with the corosync and pacemaker cluster software. I've two virtual nodes (Scientific Linux 6.4) and corosync/pacemaker installed on them: corosync-1.4.1-17.el6.x86_64 ...
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1answer
912 views

Script for running sequential job

I started recently to learn using Linux. I want to write a script in bash shell to run a serial job on a cluster. I have been searching for hints and instructions on how to write such a script. I ...
3
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1answer
609 views

How does ZFS grow/scale?

I am wondering how would one design a ZFS system to build something that is massively scalable, along the lines of your favorite cloud storage, but with all the neat benefits the come with ZFS. A ...
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1answer
279 views

Strategies for building distributed computing system with hybrid Mac and Linux systems

I want to build a distributed computing system to run Matlab, C and other programming languages for scientific computing. Now I've several old Mac machines with Lion Mac OS installed acted as web ...
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2answers
567 views

Setup linux cluster like Windows with CentOS or Ubuntu? [closed]

Along the lines of this MSDN article, how would you setup a pair of Ubuntu or CentOS (or RHEL) servers in a cluster so they appear to hosted applications as a single server, but will continue to work ...
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2answers
1k 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
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1answer
253 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 ...
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1answer
62 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 ...
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1answer
362 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
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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 ...
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3answers
3k 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
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2answers
1k 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 ...
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1answer
863 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 ...
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3answers
4k 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 ...
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0answers
274 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 ...
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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, ...