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Questions tagged [cluster]

A computer cluster is a set of connected systems that work together so that in many respects they can be viewed as a single system.

A computer cluster is a set of connected systems that work together so that in many respects they can be viewed as a single system.

117 questions
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What can a Beowulf cluster help process?

So, my school has hundreds of old computers and a few gigabit switches. Coordinating with the head of district for my school, I've been granted permission to make a Beowulf cluster, using one, two or three tutorials. But, the compute possibilities…
Hellreaver
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Does postgresql (server) setup a main cluster after installation? (14.04)

I'm surprised that installing postgresql on ubuntu doesn't give me a working postgres server setup immediately: it requires additional steps: Setting up postgresql-common (154) ... * No PostgreSQL clusters exist; see "man pg_createcluster" Setting…
Ivo van der Wijk
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ansible: How to avoid warnings

I am using ansible for monitoring my home computing net, which consists several Linux machines (x64 and Raspberries). How can I avoid warnings from every Raspberry client? [WARNING]: Platform linux on host raspi6.local is using the…
Pascal Klein
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Is it possible to disable ipv6 using cloud-init?

I have a cluster of raspberry pi's and I am updating the os from raspian to ubuntu 20.04. I am able to configure a static ip address and name server, but I can not figure out how to disable ipv6. The cloud-init documentation states that dhcp6 is…
Lateralus
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What are the directories and files that I should keep in sync for a cluster server

I am currently wanting to set up new clusters. Each cluster is defined by its software installed, software settings, and its home folder files. I want only the above to be cloned and not things…
maxisme
  • 131
3
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2 answers

Can't SSH devices within sub net

I have three computers set up like this: But I am having issues understanding how to setup the /etc/network/interfaces for each device so that they can all access the internet. I have tried this: Load Balancer: Eth1 (Local) address…
maxisme
  • 131
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3 answers

MicroK8s failed to join RPI cluster error code 500

Error 500 Hello I'm halfway through my uni dissertation and stumped as I can't for the life of me figure out why the designated leaf nodes can't join the master node's cluster? I'm following the documentation correctly from the ubuntu tutorial on…
115MPH
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How to notify a package maintainer about upstream updates?

I am running a pacemaker, pcs, corosync and I've just found that the current ubuntu package "fence_agents" is not as updated as the upstream source by various versions. Specifically, I'm having problems with "fence_vbox" which the latest version…
JuanKB1024
  • 133
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MAAS with external DHCP or Static assignment

TL;DR: How to set up MAAS, without the maas-server providing DHCP? I am having a problem with a MAAS cluster setup, since it's on a subnet that already has a DHCP/DNS provider on it, over which I do not have control. My overall goal is to set up the…
Zaki
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How to create a NAS/NFS distributed over multiple machines?

I have multiple mac minis running Ubuntu. I'm building a mini cluster. Each has a medium sized drive. I was wondering if there was a way I could turn a portion of each drive into a shared NAS/NFS of sorts. I realize it wouldn't be the fastest…
Jim McKeeth
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Enlarge/Migrate a Raid5

Situation: We have two Dell servers running as a cluster. Each of the servers runs a RAID-5 system with actually 5 * 600GB. The data AND the base system itself are stored on the RAID. Goal: Now we want to enlarge the space on the RAID-5. Right…
derHugo
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Computer Clustering

I know this question has been asked earlier but am not able to get a simple step by step answer. What I need is : Create a seemless Cluster where I would Use 1 Laptop as Main PC where I can work on and use Other Laptops as Hardware Add-ons to…
user694136
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Is there a 16 core limit in Ubuntu 16.04?

I have a Beowulf Super Computer consisting of (4) Dell PowerEdge R610 each with 2xQuad Core Xeon E5640 processors @ 2.4Ghz I also have MPIv3.2 installed for parallel messaging. The master node has the nfs server running that the other 3 compute…
Don Masters
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Which Cluster Filesystem / Distributed Filesystem for Ubuntu 16.04

I have 5 servers, 16 threads running on each of them, producing a total of 80 files at the same time, which should finally be available for every other server in the same folder (it is a MPI parallelized Finite Element Software). What I did so far:…
UHM
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mount cephfs did't work after reboot

I added this line: 10.10.10.10:6789:/ /mnt/ceph ceph name=admin,secretfile=/etc/ceph/secret.key,noatime 0 2 to /etc/fstab in all of my nodes and executed "mount -a" and works good but in next system reboot it doesn't mount…
Mansour
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