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Questions tagged [cluster]

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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Network configuration of a virtual cluster with nested virtualization

I am trying to configure a virtual cluster with VirtualBox instances, which in turn, run another virtual machine (this one created with QEMU). The following figure depicts the current set up where my ...
Bub Espinja's user avatar
3 votes
2 answers
1k views

Get the default cluster size for NTFS

I try to determine the default cluster size for NTFS. I check this table. The problem is when the size in the boundary, for example: 2 TB–16 TB: 4kb 16TB–32 TB: 8kb Then what will be the cluster size ...
alancc's user avatar
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1 answer
327 views

Loading a module in a bash script on an HPC cluster

I am submitting the following bash script with qsub on a standard university cluster, #!/bin/bash #$ -cwd # Set the working directory for the job to the current directory #$ -pe smp 1 # ...
apg's user avatar
  • 101
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0 answers
52 views

Heartbeat token failed

I have a new one today : this ! root@lab-web2:/etc/heartbeat# systemctl status heartbeat ● heartbeat.service - Heartbeat High Availability Cluster Communication and Membership Loaded: loaded (/lib/...
FuxT's user avatar
  • 74
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0 answers
87 views

I need simple key-value or SQL DB with master-master replication

I'm creating self-hosted DNS-service, that can be run by any user on it's servers. The purpose is to parent-control of the available websites and block adverstments and phishing sites by publicly ...
MihanEntalpo's user avatar
1 vote
1 answer
148 views

2 laptops and a Raspberry Pi = General purpose cluster? [duplicate]

have a few old laptops and some raspberrypi's and was wondering if it would be possible to cluster them together for general tasks/3D modeling? im not asking if this is practical. im asking if its ...
Ayden Quinn's user avatar
1 vote
0 answers
114 views

Kubernetes Environment Setup on VirtualBox to learn CI/CD Pipeline (DevSecOps)

I am just planning to learn K8s. I am interested in learning about its interconnected technologies, such as the CI/CD pipeline and devsecops. I know all of them are broad topics. But I believe the ...
zakadmin's user avatar
0 votes
1 answer
316 views

Druid coordinator cannot talk to the rest of the cluster

I'm deploying a 5-KVM cluster with Hadoop, Spark and Apache Druid for testing purposes, and I'm stuck on an issue about Druid. The running cluster is organized as this: hadoop-master: also hosts ...
Juliano B. Nequirito's user avatar
1 vote
1 answer
716 views

Samba mounts hangs the system

I set up a cluster using pcs with 2 nodes + quorum [root@konor2 etc]# pcs status Cluster name: wildflycluster Status of pacemakerd: 'Pacemaker is running' (last updated 2023-06-01 09:52:35 +02:00) ...
Ondřej Žižka's user avatar
2 votes
1 answer
93 views

Managing raid6 device with pacemaker

I am setting up 4 hosts, each exporting one local storage device over iscsi with target. Every other hosts imports it such that each host has concurrent access to all 4 each storage devices. I built a ...
Nykau's user avatar
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217 views

Why does 'module load intel' fail to load libfftw3?

I am in a cluster (centos) trying to run a program (pw.x) that requires loading three modules: intel, impi, and quantum-espresso. Now, I am getting an error saying pw.x: error while loading shared ...
Abdul Muhaymin -Free Palestine's user avatar
1 vote
1 answer
596 views

How can I add 2 missing nodes to a galera cluster that has one node that is accepting reads and writes?

I am running a galera cluster with 3 nodes, having 3TB of data. Last night due to a short power cut and a faulty UPS I completely lost 2 of the nodes and everything in /var/lib/mysql folder. At this ...
netrangermike's user avatar
0 votes
0 answers
414 views

AWS EKS Cluster : InvalidParameterException: Unsupported Kubernetes minor version update ,Gitlab CI, Terraform

The following errors occur every time I run the pipeline │ Error: error updating EKS Cluster (business-staging) version: InvalidParameterException: Unsupported Kubernetes minor version update from 1....
sam23's user avatar
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1 answer
2k views

How to sync UIDs and GIDs across multiple machines with minimal impact on users' experience?

I have two workstations, WS 1 and WS 2, and a server, S, all running Ubuntu 22.04. These machines were previously managed independently, so users could have accounts on some or all of them, and ...
Matt's user avatar
  • 103
1 vote
0 answers
95 views

Home server with different OS's instead of multiple PC? [closed]

I'm just thinking about that instead of buying powerful notebooks and PC-s for my family members is that possible to create just one powerful PC, with the different OS preinstalled on it, and just ...
Korte Alma's user avatar
0 votes
1 answer
130 views

Why a non-root installed software can work across the whole cluster?

I recently installed a new python3 and another python package locally in my account folder on a cluster with a dozen of nodes (each node with several cores). I originally thought that I can python3 ...
xiaohuamao's user avatar
0 votes
1 answer
47 views

What does 50/50 mean in cluster quorum?

What does 50/50 mean in cluster quorum? Link to table: https://docs.microsoft.com/en-us/azure-stack/hci/concepts/quorum#cluster-quorum-overview
variable's user avatar
  • 220
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0 answers
97 views

Pacemaker Check if master

I have a few shell scripts running while loops and they're extremely expensive because they check to see if the system is master by running "pcs status". Does anyone else know of a cheaper ...
choseph's user avatar
0 votes
1 answer
1k views

Ansible playbook hangs in interactive mode

If I run the command (redis-cli --cluster create 192.168.1.10:6379 192.168.1.11:6379 192.168.1.15:6379) from the host(192.168.1.10) it prompts me for "yes" and it's working but in ansible ...
rdaniel's user avatar
1 vote
0 answers
340 views

Connecting two desktops by an infiniband interconnect

I am a scientist working in a high performance computing project(the computational programming aspect) and I have no idea of networking or networking hardware required to answer my question. A ...
user avatar
0 votes
1 answer
1k views

NTFS Sectors per Cluster for 2MB cluster size

Formatted a disk partition using DiskGenius for NTFS with (maximum) cluster size of 2048KB (2MB). I notice Windows itself also can format NTFS with this cluster size in Disk Management. This setting ...
Chris Parker's user avatar
0 votes
0 answers
353 views

How do I send files from my personal computer to a cluster?

I know to send files onto my laptop from the cluster, I do something like: scp username@remotecomputer:/path/to/file/you/want/to/copy where/to/put/file/on/laptop But what about uploading a file from ...
user avatar
0 votes
1 answer
842 views

Excel - Stacked Cluster X-axis label has extra space at end?

I don't know why my chart has an extra line in my last Year of data... I added an extra space at the end for a buffer for spacing/presentation, but can't figure out why that line is still there! Any ...
StackedClusterHelp's user avatar
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0 answers
9k views

DNS Configuration: server can't find ****: NXDOMAIN

Sorry if the question title is not descriptive enough, I'm a noob @ this kind of Linux sysadmin stuff Hi for a college project I have to configure a Oracle RAC environment, for this task I chose this ...
Jeremy's user avatar
  • 101
0 votes
0 answers
17 views

Using rpm to install sw locally on RHEL cluster [duplicate]

I am new to shared Linux environments and have always had root privileges on my own machines, working without these privileges has been an exercise in how to go about working in a local setting. I am ...
ghidalgo's user avatar
0 votes
0 answers
134 views

Secure a folder in a cluster

I have a folder in a cluster that I want to secure by allowing access to me only (read, write and execute). I am new in using clusters, what are the command lines I can use? I have used umask u=rwx,g=,...
user1447888's user avatar
-2 votes
1 answer
45 views

Can I connect 2 laptops one asus another acer together so they can share their ram

So the issue is I want to run a R code estimating R0 values for a city to find this I run bootstrap simulation of 11000, for the city the code stops as I don't have the required memory in a single ...
Aviraj Mehta's user avatar
0 votes
2 answers
2k views

Percentage Overlap of 95% confidence ellipses in a PCA plot

I've generated some plots with the below code: #Remove group label from the dataframe data_just_feats <- data[ , -which(names(data) %in% c("Group"))] # Pca Plot plot_1 <- autoplot(...
Becky Heath's user avatar
0 votes
0 answers
35 views

How can I install tree on CentOS cluster?

How can I install tree program on a CentOS cluster where I do not have sudo privileges?
Rageful's user avatar
2 votes
0 answers
996 views

oVirt hosted engine install error: Failed to verify Power Management configuration

I am new to ovirt and I am trying to install it on minimal-install CentOS 7. I have been able to iron out all the wrinkles to create the host-engine, except for this error: [ ERROR ] fatal: [...
Fawzi Masri's user avatar
0 votes
0 answers
63 views

Let's encrypt, multiple webserver, one certificate

Im searching for a long time now. What is the best way to share a let's encrypt certificate across multiple webserver ? As example for a HA Cluster. One way i tought about was, to create a "dummy"...
Marc's user avatar
  • 383
0 votes
0 answers
36 views

How can I reinstall a Ubuntu with a configuration from a specific point in time?

I am setting up a database cluster on Ubuntu using XtraDB. When I do this I can happily run apt update && apt upgrade -y since this is the primordial server configuration. Now, imagine that I ...
koenig's user avatar
  • 133
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0 answers
76 views

I want to run software on a GPU in a cluster. Does the software have to be on my machine or on the cluster?

My laptop runs Linux. If I need to run any (deep learning) code on a GPU, I do so on a university cluster that I have access to (which also runs Linux). I want to use a piece of commercially ...
user1551817's user avatar
1 vote
0 answers
49 views

difference bwtween redis force failover and automatic failover caused by a master down

I want to use go-redis NewFailoverClinet as a client to set data into my database(redis-3.2.6) in a loop. Result shows using command sentinel failover <MasterName> to trigger failover could ...
uraphaelp's user avatar
1 vote
1 answer
65 views

Does a kubernetes master node contribute?

Does the master node contribute processing power to the cluster? Can it? I am interested in making a small cluster from old computers at home and I want to know where I should put the most powerful ...
chilipepperhott's user avatar
0 votes
1 answer
450 views

Windows Server 2016 - how do I migrate non-clustered Hyper-V VMs to a new cluster?

I just created a cluster with a single node to which I need to move all of our VMs so I can rebuild the other server and add it to the cluster. I've set up shared storage and configured hyperv on the ...
Daemach's user avatar
  • 103
2 votes
1 answer
91 views

bin file unavailable in Apache Drill

I installed Drill according to Drill Documentation. I have java installed. These are the steps I followed wget http://apache.mirrors.hoobly.com/drill/drill-1.16.0/apache-drill-1.16.0-src.tar.gz Then ...
Himsara Gallege's user avatar
0 votes
0 answers
230 views

Python script fails when submitted to PBS

I'm trying to submit a simple python script to PBS using the command: qsub -l procs=1 -q copperhead test.py, but the command fails with the error file (i.e., test.py.e--) saying: /var/spool/torque/...
shambakey1's user avatar
0 votes
1 answer
284 views

How to use iscsi to share disk which is CSV file system

I want to share folder between some windows server, but I can not use smb(cfs). I want to use iscsi to share disk, but I donot not how to use CSV(cluster share volume) to as they file syetem to avoid ...
user1083325's user avatar
1 vote
0 answers
43 views

Db Mirror Issue

We are having a Weird issue with the DB Mirroring and to post the the issue I will have to explain our Architecture first. We have a TWO Nodes [NODE 1 and NODE 2] cluster with Two FCIs Installed on ...
Vikas's user avatar
  • 11
0 votes
1 answer
65 views

Why does every interface in a cluster of network devices needs its own IP address?

When I have a cluster of i.e. firewalls handling multiple networks, why do they all need their own IP address additionally to the virtual cluster IP address? Isn't this a waste of addresses? EDIT: I ...
Lithilion's user avatar
  • 143
1 vote
0 answers
26 views

Create a High Avaiebily cluster Centos in NON-Geograpical regions

I have been looking to create an Extreme High available cluster in Centos 7.6. They have to be at least 2 in same data center 3 or more different Non- geographical locations Ability to expand cluster ...
Mike van Eckendonk's user avatar
1 vote
0 answers
413 views

Pacemaker/Corosync Cluster Monitoring Action keeps failling (Wildfly)

I have a 2-node cluster without STONITH based on the following software: Ubuntu 18.04.1 LTS Pacemaker 1.1.18 Corosync Cluster Engine, version '2.4.3' It is not the first cluster I build but the first ...
pToker's user avatar
  • 11
3 votes
2 answers
11k views

How to cancel a job that is on completing (CG) state?

I normally submitted some jobs using sbatch and canceled some of them after using scancel. However, they are in state CG and I cannot remove the jobs from my list. There is any way to get ride off ...
Iago Carvalho's user avatar
1 vote
2 answers
26k views

ImportError: /lib64/libstdc++.so.6: version `CXXABI_1.3.8' not found

I'm trying to run a deep learning model on a university cluster. When I write the command to run the model, I receive this error. 15CS10019@cpusrv-gpu-112:~/Tushar/Rod-keras_yolo2-master$ python3 ...
Tushar Sinha's user avatar
1 vote
0 answers
25 views

Failed Stackdriver email notification for newly created cluster

I want to create monitoring and altering notification whenever someone creates a new k8s cluster. Method: Find methodName: google.container.v1beta1.ClusterManager.CreateCluster Create Log metrics ...
DingOps's user avatar
  • 11
1 vote
1 answer
1k views

Galera cluster is still accepting writes on a single node when 2 of 3 nodes are down

I am running a 3 clusters galera database, and during redundancy tests, I saw that if I shutdown properly 2 of 3 nodes, the last one still accepts writes, even being the only only one up. I am not ...
Dazul's user avatar
  • 13
0 votes
1 answer
417 views

Removing cluster node from always on cluster

I have an alwaysOn configuration for SqlServer 2012 that is installed in two node windows cluster. We had a disk failure on the second node, and there is no way to recover it, so I should run a new ...
user1018847's user avatar
4 votes
0 answers
100 views

Why is nodes=n:ppn=m request not being properly honored by torque/moab?

On an inherited cluster that runs torque/moab scheduler, I find that the nodes:ppn requests are not properly honored. The nodes are allocated as per the value of ppn regardless of the value of node. ...
Ketan's user avatar
  • 159
0 votes
1 answer
444 views

Openshift (OKD) 3.11 - Resuming cluster installation

I'm installing OKD 3.11 using the ansible playbooks. Running the playbook deploy_cluster.yml fails every time because the script /etc/NetworkManager/dispatcher.d/99-origin-dns.sh messes up my /etc/...
Juan H. Veras's user avatar