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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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/...
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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 ...
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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 ...
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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 ...
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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 ...
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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)
...
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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 ...
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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 ...
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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 ...
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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....
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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 ...
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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 ...
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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 ...
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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
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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 ...
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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 ...
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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 ...
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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 ...
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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 ...
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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 ...
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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 ...
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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 ...
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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=,...
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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 ...
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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(...
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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?
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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: [...
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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"...
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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 ...
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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 ...
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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 ...
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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 ...
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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 ...
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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 ...
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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/...
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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 ...
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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 ...
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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 ...
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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
...
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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 ...
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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 ...
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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 ...
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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
...
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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 ...
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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 ...
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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. ...
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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/...
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Is it essential to use clusterwares for active-active cluster using SAN?
I want to use SAN storage as shared disk for two active nodes running on Linux, and I want to use it as raw device (without file system).
At first I thought it would have no problem if the disk is ...
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YARN 3 and Spark: allocate a GPU
I can't find the working Spark option to require executors with a GPU.
I'm trying to setup a HADOOP cluster in order to run Machine Learning algorithms on available GPUs via Spark.
So far I'm trying ...
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Over 100% objects are degraded, how this is possible?
Situation
Running a really small ceph cluster:
with three nodes (each containing mon, osd and mds)
an admin VM (containing also a mgr-service)
a pool replicating three times
Just to play around ...
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