discusion related to cluster mecanism.

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2answers
58 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 ...
2
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1answer
107 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, ...
2
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1answer
48 views

reduce bandwidth consumption from downloading yum updates

I have several machines (7) running fedora and would like to reduce the amount of external bandwidth I am consuming. I see that there were several attempts to setup mirrors, but those projects seem ...
2
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1answer
190 views

mpd daemon prematurely ending jobs

I am a little out of my depth here so bear with me. I am trying to configure mpirun and mpiexec to run software called Materials Studio on a 1 node, 2 processor, 12 core cluster. The submission scheme ...
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1answer
25 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
64 views

Cluster Lock Manager without TCP/IP

I have 2 linux sharing same SAN disk LUN. There are many cluster files systems to manage lock/unlock. But all of them are using a seperate TCP/IP comminication. But I need a cluster lock manager ...
0
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1answer
190 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 ...
0
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1answer
144 views

mysql high availablity for LAMP application (ubuntu 14.04)

im trying to achieve HIGH Availability (HA) for a LAMP application(News Portal website) which might be of interest to many unfamiliar users.For files im using Glusterfs (replica) for redundancy ...
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1answer
118 views

Powerful Workstation

I heard about ILM's (Industrial Light and Magic) workstations on which they create models and scenes for a lot of different movies. They have workstations with more than 1024 GB of ram and a lot of ...
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1answer
31 views

Is it possible to install RHEV on el6 clustered computer

Is it possible to use Linux (el6) clustered computer can be used as a hypervisor for RHEV 3.3/Ovirt 3.3? Cause, we can not combine RAM/CPU from two or more hypervisores to be considered as a one ...
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1answer
253 views

What software should I use to create a HPC (High performance compute) cluster with CentOS 6.5 VMs locally?

I've read about Torque, Slurm resource managers and Maui, Open Grid scheduler, Sonf of Grid Engine but I do not know which is more appropriate to use in a local environment? I've also read that I need ...
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0answers
470 views

Corosync/Pacemaker cluster loss of synchronization

I'm facing a problem with the corosync and pacemaker cluster software. I've two virtual nodes (Scientific Linux 6.4) and corosync/pacemaker installed on them: corosync-1.4.1-17.el6.x86_64 ...
3
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0answers
255 views

Should I investigate Rocks or Ubuntu/Mosix for building a cluster?

I work at a college doing system administration. Someone in their lab is looking to build a cluster for running complex Octave and C++ projects. They have brand new modern machines. My question is ...
2
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0answers
81 views

XFS over iSCSI share with cluster; will fencing cause data corruption/loss?

When using XFS on iSCSI share, where HA is enabled, nodes may be fenced by cluster. Will this result in data loss / corruption / etc. ?
2
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0answers
155 views

pacemaker hangs while stopping

I have recently installed pacemaker and corosync for managin a virtual IP. The thing is that when I want to stop a resource (Virtual IP) on all the nodes, the stop command hangs. [root@isis ~]# sudo ...
2
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0answers
117 views

Takeover delay in Heartbeat HA cluster

I have set up a heartbeat HA two node cluster. And both of server have same configuration of ha.cf #cat /etc/ha.cf logfile /var/log/ha-log autojoin none bcast eth1 warntime 20ms deadtime 40ms ...
2
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0answers
33 views

heartbeat stops after reviving primary node

I followed these steps correctly, everything worked well before I have revived heartbeat on node01 "at the last steps of the tutorial" when I hit /etc/init.d/heartbeat start it started correctly but ...
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0answers
163 views

clvm (cman) has problems with dlm

I am trying to create a volume group which is accessible on two servers with clvm. I read about it and it looks like it is most easily to do this with cman. But after hours of testing I cannot achieve ...
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0answers
410 views

About mem and vmem

I am working with a cluster machine running under linux. I have a shell script that uses mpirun to submit my jobs to the cluster machine. In that same script, I can choose the number of nodes that ...
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0answers
105 views

Microcomputer cluster for stress testing

I'm looking to build a microcomputer cluster at work for stress testing one of our applications, and while I have a little financial leeway, I would like to keep the cost low and the computing ...
0
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0answers
5 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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0answers
17 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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0answers
12 views

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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0answers
49 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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0answers
91 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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0answers
7 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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0answers
76 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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0answers
115 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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0answers
56 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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0answers
807 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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0answers
62 views

quorum disk and heuristic checking in CentOS7 Cluster

In CentOS6,we use to configure qdisk for two nodes cluster to quorate. How about in CentOS 7? I can't find any clue to do the same for it. Help will be much appreciated. Thanks,
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226 views

Two Nodes CentOS 7 Cluster clvmd

I am trying to set up two nodes CentOS 7 cluster with clvmd. I added dlmd and clvmd as clone resources in cluster using pcs command. When both nodes are up, dlmd and clvmd can start properly. But ...
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0answers
70 views

Problems with kerrighed

I heard about kerrighed and i want to use it for rendering with blender because it is a single system image. I tried to install it over pxe like the installation guide from kerrighed.org says. The ...
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0answers
17 views

PBS limiting the number of process on a node

I am trying to run a program on cluster. The program can distribute each of the calculation with an corresponding parameter, say k1, k2,...k4, to run on one core. I want to use 4 nodes with 1 ...
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0answers
22 views

centos cluster set core/each_program

I'm using unix server (OS: centos5) and I'm using several clusters. Some clusters have 8 cores, other are 24 cores and etc. I execute jobs using this command. qsub -q cluster_name -d $PWD ...
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0answers
61 views

CoreOS cluster for development / testing

I'm setting up a CoreOS cluster and want to write a bootstrap script which all developers can run to get a local virtual cluster running. Mostly I'm wondering about etcd, how I can pre-set a few ...
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0answers
162 views

Tomcat7 cluster don't replicates session

I have a Ubuntu with 2 Tomcat7 with a cluster configurations. The balancer is Apache MOD_JK. SERVER.XML: <Engine name="Catalina" defaultHost="localhost" jvmRoute="no0"> <Cluster ...
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0answers
92 views

SGE to PBS/Torque qsub conversion

Hi I am setting up a software pipeline (an extensive bioinformatic annotation tool) that was originally written to submit SGE jobs but I am on a PBS/Torque cluster. Any ideas about a way to convert ...
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0answers
160 views

Job IDs and their meaning/reference

Using Red Hat, I sent few jobs to a cluster and got "job IDs" in return. Using qstat I can see only one is running, one was canceled and the rest are still in the queue. I wrote something like this: ...