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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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Hadoop webdfs generates wrong links

So I am hosting a hadoop hdfs with spark on top on a remote server. Currently the hdfs works correctly. The problem I face has to with the webdfs. When I try to download a file with the file browser. ...
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7 views

Windows Server 2016 Failover cluster manager: multiple online servers issue

I was wondering if anybody experienced and/or resolved the following issue: Windows Failover cluster Setup: Two Windows 2016 server nodes: A and B with current Windows patches. Generic Application ...
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Dose galera cluster perform read load balancing? [migrated]

Hi Now I'm doing benchmark test with several type mariadb replication with sysbench. 1 Master - 2 Slave MariaDB on kubernetes with ceph stroage. 3 Master with Galera Cluster on kubernetes with ceph ...
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1answer
29 views

YARN 3 and Spark: allocate a GPU to executors only

I can't find the 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 out my ...
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15 views

Linux Nodes on Virtualbox Unable to ping each other

Running four CentOS 7 nodes on Oracle Virtualbox. The purpose is to set up a clustering lab. When I try to set up auth, pcs cannot communicate with the other nodes. selinux is disabled, firewalld ...
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32 views

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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1answer
136 views

Can I combine the computing power of two laptops for everyday use? [closed]

I have two laptops by different makers, both running Windows 10. Neither of them is comfortable enough for MS Office use or normal Web browsing. One has a better display, a quicker but smaller SSD, ...
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1answer
6 views

No output and error file after running job in TORQUE

I installed mpich-3.2.1, torque-5.1.0 and maui-3.3.1 on Debian 9. I have one master and one node. I use NFS file system for sharing, and ssh passwordless. When I run a job with a user that this user ...
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33 views

Network load balancing cluster not loading - Windows Server 2016

I am using three virtual machines (VirtualBox). The cluster virtual machine has Bridged mode. And the other two machines have both NAT and Bridged Mode. However when I setup the cluster, the cluster ...
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1answer
31 views

Terminating a SLURM zombie job

I have encountered the following problem during a first hard shutdown of the department cluster I am in charge of. The system is running SLURM 17.11 and using MariaDB/SQL to store accounting data. To ...
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29 views

Ansys RSM with SLURM Cluster

I am trying to connect Ansys Remote Solver Manager (RSM) on a Windows PC to a SLURM Cluster. Apparently one has to add/edit an hpc_commands.xml file to configure the client-side integration. But I am ...
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14 views

pipenv module install fails with lmod modules enabled

Recently I've been experimenting with cluster computing/administration. I've got a small RasPi cluster with shared storage. On the NFS storage, Python 3.6 is installed to a folder. I'm using LMOD to ...
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34 views

DRBD - /dev/drbd0 is missing after reboot

I've found out that block file /dev/drbd0 was missing after reboot Please advice. lrwxrwxrwx 1 root root 10 Oct 24 15:20 pgsql -> /dev/drbd0 You have new mail in /var/spool/mail/root [root@...
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16 views

PostgreSQL Native Replication | Master - Master

I am configuring a high availability environment with Debian 9.4 machine, in which I have a Heartbeat working and need to include native PostgreSQL 9.6 replication, but by default this method of ...
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88 views

Configuring Heartbeat to run shell script

I set up a high availability system with Heartbeat, I wish that when there was a drop in the main cluster and the secondary cluster was activated, Heartbeat start in it and execute a shell script. ...
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1answer
123 views

Hyper V fail over cluster

I have two Hyper V host. One with Intel adapter and other with Broadcom. Is this configuration supported.? While running validation test I am getting error message. Node 'HOST1.poc.lab' is missing a ...
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38 views

Run the CPUMiner-multi mining package with the Mosix clustering package

When I run the CPUMiner-multi package for 'xmr' digital coin mining in Ubuntu Linux under the Mosix-4.4.4 clustering package with two nodes $ ./mosrun -e ./minerd -a cryptonight -p stratum+tcp://...
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1answer
16 views

Can I make two node Hadoop 2 Cluster on two different VirtualBoxes on two different lap-tops on the same network?

So I have two lap-tops with VirtualBox both running Ubuntu 18.4 and I am trying to set up Hadoop 2 Cluster. One VB to be the master and one VB to be the slave is it possible and how? Because all the ...
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1answer
138 views

Lots of disk errors but no hardware alert. Is this hardware related or software?

Summary: Random disks on one datanode of an Hadoop cluster keeps getting read-only. Jobs fails but there is no hardware alert on server. Hello, I am administring an Hadoop cluster which runs on ...
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86 views

ceph Jewel ceph-deploy mon create failing

I'm trying to make a ceph cluster with 3 nodes on Ubuntu 16.04. I followed this and this guide but I am stumbling on the ceph-deploy mon create-initial part. I've also tried ceph-deploy --overwrite-...
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1answer
63 views

Backup MSMQ instance in a cluster

I found the right command that allows to backup a MSMQ instance in a server : mqbkup. It is working for a local instance but when the MSMQ is in a cluster, I'm not able to make this command works. ...
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37 views

Cluster storage server RAID configuration and specifications (Sanity check)

We are planning to buy a cluster for scientific computations, currently, we are in the process of putting together the specifications. We are not really sure, what should be the specifications of the ...
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99 views

Cannot Delete Files on Cluster Shared Volume as Non-Admin User (despite correct NTFS security permissions)

This appears to be inherent to CSV's. I have given a user FULL CONTROL NTFS permissions to a folder on a cluster shared volume. The user can create anything in the folder. They however cannot delete ...
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22 views

Raspberry pi clusters different pis

Am looking at building a raspberry pi cluster, and I have looked around the net but can’t find an answer to my question but do all the pis in the cluster have to be of the same type? E.g raspberry pi ...
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Block outgoing traffic of cluster user

Recently I received an account in a computer cluster. It doesn't have a firewall so any kind communication can happen. However, I would like to set up a firewall for any outgoing traffic except for ...
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52 views

FAT 32 Windows XP File Cluster occupation

Im trying to understand how many clusters a file takes up but I am currently struggling to figure it out, ive been provided with 3 screenshots as shown below. The file in question is the AUTO-CARTXT ...
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1answer
122 views

One operating system across two computers?

Is it possible to cluster two computers together and run one operating system across them? I have heard of Beowulf & such, but can I cluster things like PCI devices (graphics acceleration, ...
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77 views

Zookeeper / Exhibitor cluster nodes keep restarting

I have successfully deployed 3 Zookeeper / Exhibitor nodes in Docker containers and they form a cluster. I am starting them via java \ -jar /opt/exhibitor/exhibitor.jar \ --port ${EXHIBITOR_PORT} --...
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75 views

Installing SSL on a Network Cluster

I am trying to install an SSL certificate on a distributed Windows cluster consisting of a domain controller and several web servers. Normally, on a set up where there's just a webserver, this has ...
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1answer
25 views

troubleshoot pcsd ping resource on RHEL

we have configured ping resource monitor using REDHAT pcsd daemon. In general - we get to error in /var/log/messages pointing to ping issue for specific entity (NAS server IP in this case). However ...
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1answer
282 views

SLURM configuration: cons_res with CR_Core either cannot allocate resource or jobs end up in CG status

I am new to SLURM. I am trying to configure slurm in a new cluster. I have 4 nodes each has 14 cores. I wanted to share nodes in a way that every core can run independently (i.e., node01 can have 14 ...
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1answer
40 views

Different CPUs with same rating perform vastly differently… what is going on?

I built a cluster out of 6 OrangePi Zero's, which each have an H2+ Allwinner 1.2GHz quadcore CPU, 256MB RAM, and a 16GB class 10 Patriot SD card. They are connected via 100Mb ethernet switch and ...
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1answer
32 views

Pipeline-init can not create directory

First of all, the pipeline-init command has the same function as the postgres initdb. The difference is that pipeline is a postgres fork. dbastos@localhost ~/traderbot> pipeline-init -D /pipeline ...
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22 views

bypassing repeated second authentication

I have to move around 1000 BAM files with metadata and downstream files (each in the range of 7-10 GB) to a secure server that requires 2 factor authentication. Due to setting at the server, I need to ...
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129 views

remove slurm sacct command double entries: “extern”

Jobs currently running show two entries, one of them has an .extern suffix. Completed (or failed) jobs also have a third entry: .batch. Is there a way to remove (or not show these) from the sacct ...
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1answer
167 views

Creating users across all cluster nodes

Is there a way to add a user across all cluster nodes via command line? I have the manual instructions from IBM here (and listed below) and found instructions for listing the users (cl_lsuser), but ...
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1answer
149 views

Create a Cluster Shared Volume with 3 Servers

I'm new to Failover Cluster and everthing that has to do with it. At the Moment I have two Hyper-V Hosts Connected to a VLAN and a third Server which I would like to use as a Fileshare so the VMs will ...
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1answer
65 views

Simple Homebased “Super-kind-of” Computer [duplicate]

Well something similar to that. Got an ancient desktop running a ubuntu-based distro and an equally ancient macbook. Would like to connect and utilize both their computing capability for day-to-day ...
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2answers
216 views

How to make MySQL cluster completely failsafe?

So I want to set up a MySQL database server with high availability - thus I got myself two devices (Banana Pi) and followed a tutorial on how to install the MySQL cluster software. I know that a ...
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2answers
3k views

Ping only working in one direction

I have a small cluster running centos 7 composed of machines A, B and C. They are all separate physical machines connected on the same LAN. Machine A can ping B and C. Machine B can ping A and C. ...
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1answer
92 views

What does the output of `showq -r -u <username>` mean?

On a cluster, I did showq -r -u matthey where matthey is my username. Here is the output active jobs------------------------ JOBID S PAR EFFIC XFACTOR Q USERNAME ACCNT ...
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1answer
16 views

Hardware failures while building new cluster

Someone at my company is building a high-performance cluster (50 CPU cores, half a dozen machines, 32 memory modules per machine). We aren't experienced with clusters at all, and we are concerned that ...
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1answer
1k views

IIS failover Clusters?

I'm new to servers and stuff(I'm a programmer not a server guy) and I have a question about IIS failover clustering. I have two IIS servers up and running, and they're identical. I want to set up the ...
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1answer
425 views

Exchange Server DAG and Failover Cluster with High Availability

I have 2 exchange servers (EXCH1 and EXCH2) that have Exchange 2013 on them. They are both on Windows Server 2012 R2 (Standard) machines. They are also a part of a DAG (Database Availability Group) (...
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35 views

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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0answers
2k 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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170 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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1answer
308 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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0answers
166 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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1answer
500 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. ...