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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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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29 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"...
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29 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 ...
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13 views
Trouble switching between servers in a cluster using PuTTy on Windows
I am trying to connect to a cluster and I'm not very experienced in it. I generated the two keys using PuTTy gen and then I tried to connect to the cluster using PuTTy configure. After I logged in, I ...
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12 views
Can we run any program in MPI cluster? [duplicate]
I have a few idle desktop PCs (Ubuntu/Intel i5/4GB) which I intend to cluster using MPI. Once clustered can I run any program on these system or is there a need to configure each program to make use ...
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23 views
Why is there such a big difference between Size and Size on Disk on External HDD when Internal HDD has same cluster size and no difference [duplicate]
I have two external hard drive from WD Elements connected to a raspberry pi 4 used as a NAS system.
The raspberry is running raspbian lite.
On my computer running Windows 10, I have an hard drive ...
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33 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 ...
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29 views
Running BOINC in cluster computing—Help Wanted
In a magazine I learned how to cluster compute with mpi.
I would like to cluster compute BOINC to a) learn about cluster computing and b) help out researchers.
But all the magazine showed was ...
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19 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 ...
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46 views
throwable caught when submitting- druid coordinator
I have upgraded my druid cluster from 0.12 to 0.16 recently. coordinator-overload log is flooded with bellow exception now.
2019-10-25T16:57:12,257 ERROR [Master-PeonExec--0] org.apache.druid.server....
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32 views
What are the difference between NGINX Plus and NGINX Community edition? Doubts about NGINX installation and configuration
I am absolutly new in NGINX and I have the following doubts about this product.
I have to create a WSO2 EI cluster (but I think that my doubts are not strictly related to this specific technology) and ...
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1answer
48 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 ...
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1answer
46 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 ...
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140 views
Deleting AWS EMR Cluster using cli
As the title. I'm running aws emr terminate-clusters --cluster-ids j-xxxxxxx but I'm getting the following error
An error occurred (ValidationException) when calling the SetTerminationProtection ...
2
votes
1answer
20 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 ...
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96 views
ZooKeeper with Solr - import configuration
EDIT: resolved !!!
schema.xml was bad :D
So configs below are valid.
I have 3 servers in Zookeper-Solr cluster:
- solr-1
- solr-2
- solr-3
Directory structure and configuration on solr-1 :
/opt/...
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39 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/...
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1answer
17 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 ...
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157 views
MariaDB/Galera SST sync, foreign key issue?
I am having a bit of an issue with a MariaDB Galera cluster. Its a two node cluster, was going to increase to three soon.
Two servers:
ptdb01
ptdb02
The ptdb01 server left the cluster for some ...
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24 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 ...
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127 views
Databricks: install PYODBC failling on cluster and on random occasions when installing using a notebook
I am using pyodbc in my codes and tried installing pyodbc using PyPI on the actual cluster, however it failed. (DBX cluster runtime = 5.1ML Demo, Python version 3(i.e. 3.5)).
To solve this issue I'...
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1answer
49 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 ...
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354 views
hat does the message “A processor failed, forming new configuration.” from corosync mean on a RHEL 7 cluster node?
May 7 18:37:11 node2 corosync[12718]: [TOTEM ] A processor failed, forming new configuration.
May 7 18:37:23 node2 corosync[12718]: [QUORUM] Members[2]: 2 3
May 7 18:37:23 node2 corosync[...
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16 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
...
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0answers
16 views
Rabbitmq with Mqtt plugin is not working on cluster
I have set up 3 node rabbitMq cluster and using it as mqtt broker . So whenever I am publishing a retained msg on on node then ideally it should be replicated through out the cluster nodes. But its ...
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212 views
PMM Status Code 502 (text/html)
We are running a PMM(Percona Monitoring & Management) Server via Docker Container. Recently we have removed pmm-data container directly & again created new container & ran pmm-server ...
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0answers
170 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 ...
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0answers
183 views
How to setup nodes on EC2 for a SLURM cluster properly?
I have installed a Burstable and Event-driven HPC Cluster on AWS Using Slurm according to this tutorial. I have build/installed OpenMPI on the head node with PMI2 support according to this guide. I ...
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1answer
496 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 ...
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60 views
Corosync caused a 100% CPU load after a node disappeared. How to fix it?
A general setup (the very first for me) of Corosync + Pacemaker is made upon 4 Virtual Servers with a VirtualIP, a private network is organised with a help of OpenVPN.
corosync-2.4.3-4.el7.x86_64
...
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119 views
Hadoop Mapreduce job doesn't start properly
in the last few days I've been playing with Hadoop, and I've been trying to implement the k-meters count (find the absolute frequencies of different words lengths)
Everything is implemented following ...
1
vote
1answer
2k 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 ...
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0answers
19 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
...
1
vote
1answer
235 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 ...
0
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1answer
142 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 ...
4
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0answers
71 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. ...
0
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1answer
338 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/...
0
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1answer
54 views
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 ...
1
vote
1answer
528 views
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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0answers
82 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 ...
-2
votes
1answer
1k 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
33 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 ...
0
votes
1answer
393 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 ...
0
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0answers
64 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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0answers
37 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 ...
4
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0answers
375 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.
...
3
votes
1answer
412 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 ...
0
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0answers
89 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://...
0
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1answer
22 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 ...
0
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1answer
730 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 ...
