discusion related to cluster mecanism.

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MySQL Cluster node crashed, how to re-add in cluster?

We have 2 data node in mysql cluster, and one of them got crashed (totally). I have re-install new OS and now i want to re-add same node back to cluster. How to do that without re-starting whole ...
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Two node cluster pacemaker setup error (http error : 500) [closed]

[root@node01 ~]# pcs cluster auth node01 node02 Username: hacluster password: node01: Already authorized node02: Already authorized (same password) [root@node01 ~]# pcs cluster setup --name mycluster ...
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1answer
17 views

Help in building Yocto(open embedded) projects using cluster computing in Linux

I need to reduce project build time in Yocto (open embedded) in Linux platform. So I decided to cluster computers for the best performance for compilation and building. My question: Is there any MPI ...
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18 views

FreeBSD 10.2 - Is three-way HAST replication possible?

I have a pair of FreeBSD 10.2 servers using HAST to keep a volume replicated between them. I'm introducing two new storage nodes that have much newer hardware and will eventually replace the existing ...
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1answer
45 views

Validate start-dfs.sh

I am trying to setup a Hadoop cluster, where master is my laptop and slave is the virtualbox, following this guide. So, I did, from master: gsamaras@gsamaras:/home/hadoopuser/hadoop/sbin$ sudo ...
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2answers
65 views

host can't ssh guest, but guest can

This is a follow-up question from: Make virtualbox get a different IP address than my laptop. I ended up with these /etc/hosts files on both my laptop running Ubuntu 14.04 (the host) and my virtualbox ...
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52 views

Make virtualbox get a different IP address than my laptop

I am trying to setup a 2-node Hadoop cluster (following this guide), where the master is going to be my Ubuntu laptop and the slave a virtualbox running ubuntu. I also read about networking in ...
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22 views

problem with ABAQUS job on Rocks cluster

I created ROCKS6 cluster and i installed ABAQUS on my cluster and it works well on frontend, but i can not submit job on my 2 other compute nodes. I just want to run ABAQUS on this cluster (frontend ...
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41 views

How to install ABAQUS software on Rocks cluster 6.2

First of all sorry for my english. I create a new cluster with 3 . which one of them is frontend and two of them is compute . i should notice that, i am newest in linux and linux hpc clustering. I ...
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10 views

Writing a unique number in a parallel ssh / clusterssh environment

I'm trying to set up a cluster of Kafka servers and I'm currently using clusterssh for it, which works great. As one step of the setup, I have to assign a unique id to every cluster (as in 0, 1, 2, ...
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9 views

High Performance Cluster setup

I am starting to setup a High Performance Cluster (HPC) that will have a head node, 16 sub nodes and 8 GPU nodes. I am looking into Red Hat 7.2 as they state to have HPC capability. Thoughts on ...
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58 views

How do I add a Redis Cluster to a Pacemaker CentOS 7 Cluster?

I need to set up a CentOS 7 web server cluster that is able to manage user sessions while also load balancing across the nodes in the cluster. Towards this end, I have transcribed instructions from ...
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spark job dependency on AMI version

I have run a spark job on emr cluster with AMI version 2.4.0-amzn-7 and it completes in 11 hours. but when same jobs are run on AMI 2.4.0-amzn-3, the process takes more than 18 hours to complete. ...
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1answer
19 views

Terminal to manage cluster, where the nodes are accessible from a remote PC?

I need to manage multiple cluster nodes from my PC. The catch is that the cluster nodes are accessible only from a remote PC. So first I have to ssh to the remote PC, and then ssh to a cluster node ...
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1answer
32 views

Problems with qorum device on Cluster Suite

I've built a 2 nodes ha-cluster with Cluster Suite on RH6.5; the configuration is very simple: 1 lvm shared volume, 1 fs over the shared volume and 1 vip. I've a failover domain and I'm using a scsi ...
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2answers
58 views

How do I quickly transfer a large archive (~16GB)

How do I quickly transfer a large archive (~16GB) from one mount point to another on 80 servers? The mount points are on separate partitions. I tried ansible (with the -f 100 option) and a bash script ...
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39 views

HPL benchmark show very low calculation speed

I’m constructing cluster for mph parallel calculation. To check performance of my node, I used HPL linpack benchmark. However, the benchmark result is much more low than a theoretical value. The ...
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1answer
145 views

Zookeeper DNS name problems with leader elections when migrating from Windows to Debian

I am migrating a kafka/zookeeper cluster on Windows to Debian wheezy. Java version: 1.7.0_80 Debian version: 7.9 Zookeeper version: 3.3.5+dfsg1-2 0 Kafka version: 2.10-0.8.2.1 If I configure ...
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1answer
66 views

Failover NFS service with shared storage

I need to configure a cluster with shared storage that can be moved from Node A to Node B and vica versa. In case of failure of Node A, Node B should take over the IP address associated with the NFS ...
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1answer
38 views

wget from Source Forge

I know this has been asked here: How do I download from SourceForge with wget? But I can't get it to work with my specific tool. Can anyone help me download from this sourceforge link: ...
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1answer
69 views

Running GNU parallel --sem hangs on SGE Cluster

I'm trying to run 3 commands in parallel on an SGE cluster, e.g. cmds=("prog 1 2 3" "prog 4 5 6" "prog 7 8 9") for cmd in "${cmds[@]}" do sem -j 3 $cmd done sem --wait So, my commands execute ...
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19 views

Avoid being assigned to a particular node in cluster

I am using the department's cluster which adapts the pbs queuing system to run some mpi programs. Are there any ways that I can avoid being assigned to a particular node when submitting a job via qsub ...
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224 views

qsub job in state Eqw error: can't chdir to directory: No such file or directory

I'm trying to submit a job on a cluster via qsub, but it gets stuck in state "Eqw" with error message: $ qstat -j 466 | grep error error reason 1: 09/18/2015 17:12:32 [1125:3453]: error: ...
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1answer
88 views

Run qsub on cluster via ssh

I'm setting up a system which automatically generates computing jobs on a local (Linux) machine, copies them to a cluster and submits them to the queuing system. I try to avoid the need for scripts ...
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85 views

Python script works from terminal, but fails in scheduler, to write to external drive

I am trying to use a Python script to read/write from an external disk in linux, which works fine. The problem comes when I use a job scheduler to execute the Python program. I am running all this on ...
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80 views

32 bit master node | 64 bit slave node | Linux Server [closed]

The Basic Scenario I have a 32 bit laptop currently running Ubuntu 15.04 32 bit. Its getting a bit old and outdated now so I plan to buy a cheap second hand server. I plan to buy something like an ...
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1answer
197 views

RedHat cluster with rgmanager or pacemaker as resource manager on Oracle VirtualBox

I'm learning RedHat cluster and I have setup a 3 node cluster (Centos 6.7), corosync, cman and rgmanager on Oracle VirtualBox version 5.x. The cluster is working fine (the clustat commmand shows that ...
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1answer
15 views

How to see more information for queued Jobs in SLURM

With srun --test-only SLURM will return expected start date AND expected nodes. However, if the job is submitted, I cannot get the information about the nodes. Is there any way to find out, what ...
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1answer
68 views

Python processes appearing and disappearing in top

I concurrently launched around 12 Python scripts on a 24-core server (Ubuntu 14.04 LTS x64). Each of Python script takes around one hour to complete. I see in top that they appear quite sporadically, ...
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1answer
422 views

RHEL 6.6 Cluster - Waiting for Quorum Timed-out

I'm trying to set up RHEL Cluster. Everything is fine (well, not at all). I'm using 2 nodes, and 1 quorum (LUN). When I start both cman services at the same time, it's fine. Cluster is up, every ...
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1answer
206 views

Network Configuration for Rocks Cluster

So I'm trying to set up a Rocks cluster and seem to be failing at the network configuration part, as I can not get an internet connection in my final install. So the address of that computer that ...
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104 views

File Server on High Availability (HA) Setup for LAMP?

I'm not sure what is the most proper way (industrial standard) to setup the High Availability servers (especially for LAMP Stack). Lets say i have: 2 Load-balanced Web Servers (Apaches) Question: ...
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28 views

Centos Redhat Cluster LICI RUCCI

I have 3 systems [Normal Desktops College LAB] with 2 Network Interfaces each node1.test.com : Public IP : 10.10.10.2 Cluster Hearbeat: 192.168.1.2 node2.test.com : Public IP : 10.10.10.3 Cluster ...
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2answers
274 views

Trying to install a cluster, DHCP failing to start

Trying to install a linux cluster using this tutorial. I am running CentOS 6.3. When I try to start DHCP with service dhcpd start, it fails. I've used tail -f /var/log/messages and dhcpd -t, but I ...
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XtreemOs for rendering

I am searching for a single system solution because i want to use such a system for rendering. I already found kerrighed but I did not get it working. Now i found the XtreemOS. On wikipedia, it says ...
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80 views

Getting error in nslookup

I am trying to do nslookup skhdphost1 but I am getting below error. When I try to Reverse lookup checking using command nslookup 172.16.xxx.xx again getting the same error: The error message is: ...
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1answer
117 views

Running a systemd service once a day (on a CoreOS cluster)

I currently have a CoreOS cluster on AWS. The cluster runs multiples containers, mainly for Rails applications. However, one of this container is a pure Ruby app processing a lot of data from specific ...
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255 views

rgmanager [fs] start_filesystem: Could not match “f6a58cf7-b39b-489c-add5-444ceab8af9d” with a real device

I am trying to install two node cluster for web server. We have super mico hardware HA BOX. It has 5 disk. one disk is used for node1 os installation and another disk is for node2 OS. Remaining disk ...
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1answer
81 views

Move Root Folders to DRBD

What folders in the root folder ( "/" ) cannot be moved to a clustered file system (using DRBD and probably GFS2)? Would like to setup a basic cluster to increase uptime for our file server, web ...
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9 views

Can the PBS job submission script be changed while queuing

I have prepared a script and submitted to a PBS queue on a cluster. However, I discovered that there's a typo in the script. Could I just modify the script when queuing or I have to qdel first before ...
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1answer
36 views

GNU\Linux clustreing , Which level? Which application? [closed]

I need to start GNU* clustering, But I have problem, Which level: DB level? (replication) file system? (distributed) process level ? (such as intel fortran for civilization softwares) new process ? ...
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152 views

CentOS 6.5 + Pacemaker/Corosync + DRDB + MySQL Error

This is the first time I post on this forum. Glad to join the forum. I doing a project with Pacemaker/Corosync, DRDB and MySQL. I follow the document from clusterlab.org. Everything seem worked OK ...
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1answer
80 views

Rocks cluster slave spontaneous reset?

I am 'administering' a small cluster (4 nodes) based on Rocks Cluster. After a recent restart it appears that the slave nodes have all decided to spontaneously reinstall their operating systems, ...
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245 views

HAProxy with Roundrobin working only on 2 of 3 MySQL servers, why?

Good day. I'm following this article to configure HAProxy to balance with roundrobin between 3 MySQL servers (db1, db2, db3) in a MariaDB Galera cluster (working perfectly). However I have a ...
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85 views

How to benchmark performance and ensure high-availability in a CentOS 7 cluster?

To give you a little context on my question, I'd like to mention that I am writing an essay on high performance and high availability clusters using a 2-node (I know that is not optimal, but it's what ...
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2answers
114 views

Code for submitting job on cluster

I don't know whether this is the right place for posting this question, if not kindly let me know where I can ask. My doubt: I use the following code to submit a job on a cluster, but I don't know ...
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1answer
181 views

Clustered NFS server reply ERR 24: Auth Bogus Credentials (seal broken)

I have 4 servers on the VirtualBox. Two of the servers are a CentOS 7 cluster with Pacemaker(corosync), and they have an NFSv4 server in Active/Passive mode. There are also 2 clients with CentOS 6, ...
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1answer
54 views

Saving power on a linux cluster

I would like to buy a cluster (30-60 nodes) for work and install linux on it. The cluster should have a queue system like PBS, for instance. It should also be capable of doing parallel computation. I ...
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1k views

Error starting MySQL in a MariaDB Galera cluster in CentOS 7

I'm trying to setup a MariaDB Galera cluster following this tutorial exactly as it is, and I'm stuck in the Step 7– Initialize the first cluster node, I'm doing so with sudo /etc/init.d/mysql start ...
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1answer
393 views

Why did Red Hat drop support for DRBD beginning with RHEL 7?

Does anybody know the reasons why Red Hat decided to drop support for DRBD beginning with RHEL 7, thus favoring GlusterFS as the preferred solution for network-based replication / mirroring in a ...