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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Simple centralized logging for small Debian-based cluster

I have small cluster with 8 servers. Every one has Debian 8.4 installed. I'm only one administrator. What would be the simplest solution for centralized logging with following requirements: Easy to ...
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7 views

Failover clustering validation report error: Validate Active Directory Configuration

I am deploying failover clustering on windows server 2012 r2 enterprise When validate configuration, failover cluster validation report an error At system configuration > Validate Active Directory ...
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Does server clustering affect CPU performance?

I'm looking to improve CPU performance for hosting CSGO game servers as they are CPU intensive and require the best single core/threaded performance possible Currently I'm using a server with an i7 ...
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7 views

List of possible causes for cluster node fail-over?

list of possible causes for cluster node fail-over? (I am looking for answer in regards to RHEL clusters) automatic cluster node fail-over manual cluster fail-over I'm new in clustering I want to ...
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11 views

`qsub` leaves “NotQueued ” in “blocked jobs”

I am working on a remote cluster (westgrid > bugaboo) on which I submit processes via a .pbs file. My .pbs looks like this #!/bin/bash #PBS -l procs=1 #PBS -l walltime=100:00:00 #PBS -N ...
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7 views

Installing ambari on centos7 stop registering hosts when scp files

I'm installing Ambari 2.1.0: I can connect by ssh without pass (crossing id_rsa.pub) I checked HDP 2.3 with redhat7 OS Problem occurs in two hosts (phisical machines), one is local machine which is ...
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25 views

Silent error when Terraform deploys to ECS

I’m new to Terraform and having problems setting up a very basic configuration. I want something that brings up my “docker-whale” image. From looking at Hashicorp and AWS docs, it seems I need an ...
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6 views

Corosync dependency on unmanaged service

I'm trying to build an HA syslog cluster. UDP syslog being stateless, there is no way for a balancer to ensure liveness of the nodes, so I'm experimenting with PCS/Corosync on CentoOS7. Ideally, I ...
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16 views

Clustered SQL database requires full recovery mode?

The application we provide customers with requires an SQL database. Due to the nature of the application, we recommend the recovery mode to be set to Simple as it is not critical data that is stored. ...
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39 views

How to combine 2 Linux PC to serve Owncloud server

I just create owncloud server using my old PC with Intel Quadcore, 8GB memory, Centos 7, Apache, Mysql database. I already install RAID drive to make the read speed more faster. However, I try to ...
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46 views

DiskView reports unallocated cluster, but WinHex reports cluster occupied by disk file - why?

I've recently been tinkering with deleting text files and seeing what information I can gather from the clusters that those files used to be on. However, I've hit something that's really made me ...
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27 views

How to know how much (and which) data I have lost after disk failure

One of the disks in my cluster (with a RAID 5) died last week and I had to replace it. After a rebuild and a consistency check, some data belonging to different users were lost. I need to know exactly ...
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25 views

Red Hat High Availabilty Oracle Resource Wallet Error

Environment: Running Red Hat 7.2, using Pacemaker 1.1.13-10.el7_2.2 and Corosync 2.3.4-7.el7_2.1 to implement cluster failover of an Oracle 12c Enterprise Edition Release 12.1.0.2.0 Database. ...
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2answers
61 views

Can i setup cluster for windows 7?

I have two computers, both shitty ones, one is Celeron with two cores 2.2. second one is Pentium 4 with one core, both with 2 GB of ram. now what i want to achieve is that to use that second one to ...
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1answer
35 views

How to undo vgchange --clustered y?

At the beginning of a cluster setup I invoked sudo vgchange --clustered y [name] and accepted the warning that the volume might be inaccessible - no problem, of course, because the cluster isn't setup ...
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54 views

How to find bottleneck in mysqlcluster and apache/php server?

I have setup a mysql cluster 7.3.x with 2 Datanodes,2 SQL nodes and 1 Management Node in a LXD/LXC centos 6.7 containers and a separate Apache 2.2.x/PHP-5.5 web server. The website currently serves a ...
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19 views

How to run Apache Spark on PBS cluster?

I'm trying to run several Apache Spark workers on a cluster that uses a PBS-based cluster manager, TORQUE. What I've tried so far: pbs-spark-submit, but it appears to have been taken offline and ...
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45 views

Is extra CPU on USB dongle possible? [closed]

Is it theoretically possible to build a local cluster for distributed computing using any type of a dongle plugged into a USB or HDMI port, and connecting to the Linux console inside over SSH just ...
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19 views

two screen layer: reconection via ssh

my question is how to best manage two layers of "screen" sessions: In my institute we have a compute cluster for numerical simulation. To login on that cluster one has to go via a load balancer who ...
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11 views

Home directory defaults to different machine in cluster

I am relatively new to the Linux and I stumbled to the following issue. I have a cluster of four machines. I have Cloudera agent installed on them. I want to run Apache Spark task, in this task I have ...
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86 views

Diagnosing iSCSI bottleneck

I just got my hands on a few DL380 G5s, and I thought I would use them in my home lab to test out the creation of a Hyper-V cluster using an iSCSI storage setup. I have installed Server 2012 R2 on all ...
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339 views

3TB NTFS Volume Allocation Unit Size

Getting ready to deploy a 3TB to be used as shared backup and file storage for Windows 7/10 and Linux. I know I need to set it to GPT partition table, but what I'd the best cluster/allocation unit ...
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38 views

Extensible Linux Cluster Operating System

Assume I have a laptop(2 cores, 4G memory, 512G regular disk) running ubuntu and a desktop(4 cores, 16G memory, 512G ssd disk) with no operating system installed(i.e. a new suite of computing ...
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13 views

Accessing data on a cluster through ssh

I have compute access on a mac pro, and am planning to get storage access on a linux based cluster to which I can ssh into. Is it possible to use the mac pro for my compute needs, but keeping the ...
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114 views

Upgrading gcc for a specific user account

I work on a computing cluster running CentOS6/RHEL6 that I share with ~100 other users, overseen by a single IT admin. Recently, I started writing in C++, and some of my code depends on C++11. ...
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95 views

How can I list all IPs when Consul Cluster DNS is queried?

I have a 5 node Consul Cluster. When I run the DNS command below, it lists only three IPs at a time randomly. How can I have all 5 IPs listed at the same time (randomly) as opposed to three at a time? ...
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29 views

Creating a cluster on Ambari

I have installed ambari and the server is running - as can be seen by the screenshot. What is the procedure to then create a cluster? The documentation literally says "follow the onscreen ...
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28 views

How can I list all head node host names on a network?

We have multiple clusters available at work. I don't know the names of all of them. How can I get a list of all head nodes available?
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I have created an user in ubuntu cluster, cannot login to the other nodes using the same credentials

#ssh -v atmos3 ......................... ...... debug1: Trying private key: /home/sghimire/.ssh/id_rsa debug1: Trying private key: /home/sghimire/.ssh/id_dsa debug1: Trying private key: ...
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22 views

How do you create a sql 2014 cluster disk for a cluster across multiple hyper-v machines

I have an SQL 2014 cluster spread across multiple physical machines running Windows Server 2012 and Hyper-V. I'm attempting to install Skype for Business 2015. However the install script appears to ...
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28 views

Virtual SAN not recognizing any disks

I'm trying to set up a virtual san but can't seem to add any disks. I made a cluster and added the hosts. Here's what I get when I go to disk management in the cluster: ...
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44 views

File sharing between a cluster of linux machines

I have a cluster of 6 machines. The other day we had a power cut and the fully functioning cluster turned off. Now we have turned it back on its no longer functioning and the person who was knew what ...
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159 views

SSH Bash script for repeated commands on a network cluster

I have a network cluster of about 100 machines, a piece of software and a large list of different parameters for the software. I want to use the cluster to speed up the calculation, so each machine ...
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37 views

union-mount file system that actually deletes from all layers

Here's my use-case: I have roughly a dozen machines loosely clustered together, each with a few hundred GB partition that's currently not used. I would like to make a scratch partition so that users ...
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31 views

Cluster url fails for port 8080

I have configured a clustered with 2 servers. Server1 IP: 10.200.200.20 Server2 IP: 10.200.200.21 CLUSTER_IP : 10.200.200.24 Modular Disk storage array IP: 10.200.200.22,10.200.200.23 My application ...
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1answer
206 views

Setting up cluster with vagrant

I want to create a cluster of 4 CentOS VMs using Vagrant. I installed Vagrant and VirtualBox on my Widnows machine, downloaded the CentOS 64 box and created the cluster. Steps: Execute 'vagrant box ...
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2k views

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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35 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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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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29 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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11 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
28 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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1answer
476 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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1answer
77 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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1answer
138 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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26 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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65 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
794 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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91 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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59 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 ...