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

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mount.ocfs2: Transport endpoint is not connected while mounting…?

I have replaced a dead node that was running in dual-primary mode with OCFS2. All the steps work: /proc/drbd version: 8.3.13 (api:88/proto:86-96) GIT-hash: 83ca112086600faacab2f157bc5a9324f7bd7f77 ...
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1answer
187 views

Chef Integration Tasks Best Practices

I am new to chef (using hosted chef server) and am muddling along ok and basically understand how to provision individual servers. What I am having trouble with is figuring out how to integrate the ...
0
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1answer
165 views

How virtual ip shifts between two nodes

In redhat clustering (HA), Due to lack of knowledge on clustering, If the master node fails the virtual ip will be shifted to slave and the second node becomes the master, how the shifting of virtual ...
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1answer
95 views

Benefits of ARR in a load balanced environment (Azure)?

I've built a simple IIS 8 web farm on Azure VMs. The web farm has 3 instances (Windows Server 2012) using shared configuration. The load balancing is handled by the Azure's built-in load balancer. ...
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1answer
38 views

Exploit monetarily a large unused cluster [closed]

At work we have a 200 core unused cluster, most of the researchers working here just left and nowadays almost nobody uses it. We would take advantage of it. Previously somebody asked it how to exploit ...
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1answer
1k views

Redhat cluster Vs Pacemaker Vs Gluster Vs Sheepdog

Changing the entire question as earlier one was very confusing. I have been exploring different clustering system to run Virtual machines on two different machines on LAN with high availability. ...
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4answers
406 views

Newbie questions on MAC and high availability failovers

I am reading about High Availability and I can not understand the following I read: On failover the primary IP migrates to the backup server BUT so must the MAC address. Specifically I read that ...
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3answers
88 views

Multiport NICs in servers and clusters [closed]

I wanted to know are multi-port NICs common in server systems? E.g in clustering are they used always?
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0answers
37 views

Partial mail sync for multi continent mail server expansion? [closed]

I am wondering if there is solution (we currently use Dovecot but another product is ok too), that would allow to setup a second Imap server (or proxy) that would work efficiently over slow links. An ...
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2answers
360 views

How to manage several Linux workstation like a cluster? [closed]

How does one go about managing a lab of Linux workstations? I'd like for users to be able to log in, run their GUI apps (LibreOffice, Firefox, Eclipse, etc), and for the computers to be able to be ...
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2answers
2k views

How to set up Zabbix to monitor SQL Server Failover Active-Passive Cluster?

It should be simple, so it is just most likely my approach being totally off and someone will hopefully prod me into the right direction. We have a Zabbix 2.0.3 server instance set up monitoring a ...
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1answer
342 views

Built local glibc, broke system, how do I ssh without parsing the .bashrc?

The cluster I am on had really old build tools and I needed to use CUDA5. I'm a pretty clever dude and I planned on building the necissary tools. So, I built a local copy of gcc, bintools, and ...
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1answer
103 views

Relying on shared disks for heartbeat

I read somewhere that using shared disks for heartbeats is reliable even if network totally fails. I read it in the context of remedy from split-brain. Is this correct? But I can not understand this. ...
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1answer
168 views

Open MPI can't launch remote nodes via SSH

I am trying to set up Open MPI between a few machines on out network. Open MPI works fine locally, but I just can't get it to work on a remote node. I can ssh into the remote machine (without ...
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2answers
1k views

Heavy write to Galera cluster - table locked, cluster practically unusable

I set up Galera Cluster on 3 nodes. It works perfectly for reading data. I have done simple application to make some test on the cluster. Unfortunately I have to say that the Cluster fails totally ...
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2answers
760 views

Proxmox and PXE boot

I have 10 rack servers, each has an 80 GB hard drive, and a Dell PowerVault with no hard drives. It is possible to take all these hard drives and put them in the PowerVault cluster, then boot proxmox ...
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1answer
3k views

Windows 2012 Cluster on P6300 SCSI-3 Persistent Reservation issues

Scenario: 1 HP 6300 with latest XCS version 1 Command View 10.1 + with hosts defined as Windows 2008 2 BL460c Gen8 Servers with SPP 2012.10 and Windows Server 2012 Datacenter Edition with all the ...
1
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1answer
301 views

GlassFish cluster-targeted jdbc is not enabled

I have a GlassFish cluster. When I tried to add node and a instance, DAS saids a bunch of error messages telling Resource [ jdbc/xxxx ] of type [ jdbc ] is not enabled ...
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1answer
2k views

Logging in user in Windows 2008 server using LogonUser fails on LogonType LOGON32_LOGON_SERVICE

I am using LogonUser function to logon an account to Windows 2008 R2 server on a domain with clusterring. When using LOGON32_LOGON_INTERACTIVE as LogonType, I successfully login. When using ...
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2answers
80 views

Suggestions on providing HA access to an external (fibre) RAID subsystem

We are looking at upgrading our storage capacity with an external RAID subsystem that has redundant (2) fibre controllers, each controller has 4 x 8 Gbps fibre ports. I would like to make access to ...
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2answers
120 views

Using cssh with an ssh clone

Just had a quick question about using ClusterSSH(cssh) with a homegrown ssh-like/ssh-clone application which we use internally to connect to remote machines. I tried using the ssh = ...
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1answer
948 views

Get the Cluster Owning node name using powershell

Cluster Resource "Cluster Disk" fetching the data Listing status for resource 'SQL Server (CLUSTER)': Resource Group Node Status Cluster Disk ...
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2answers
424 views

Clustered file systems as XenServer storage

I want to use shared storage for a XenServer environment with 4 host servers which are running various VMs under XenServer. Planning to use 2 extra servers as storage with high availability of some ...
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1answer
1k views

Mounting vmfs5 under linux?

Can anyone tell me if there is a safe (i.e. data won't be corrupted) a VMFS 5 filesystem under linux, where the VMFS 5 filesystem is already mounted by several ESXi hosts in a vSphere cluster? Thanks ...
0
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1answer
4k views

How to get cluster information remotely via Powershell?

I've been trying to find a good way to gather various pieces of a windows cluster setup remotely, preferably via WMI, as we are not yet at a point where Powershell remoting is implemented (and I know ...
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1answer
2k views

How to setup a simple Ubuntu Server Tomcat cluster on VirtualBox for testing? [closed]

I am looking for the step by step instructions to setup at least two simple Ubuntu Virtual Core 12.10 Server VMs on Oracle VirtualBox under Windows 7 64bit. The test setup would be: Apache HTTP ...
3
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1answer
1k views

Hyper-V virtual machine can't be migrated to a specific host in the cluster

I have a three-node Hyper-V cluster running on Windows Server 2008 R2 which is working quite flawlessly: there are no errors, live migration works, all hosts can and will happily run all virtual ...
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1answer
128 views

ScaleMP vs SAS Grid

At my workplace we have a heavily used SAS server, but its workload is such that obtaining 1 minute of CPU time often takes 10 minutes of real time. This isn't just due to an I/O or network bottleneck ...
2
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1answer
902 views

Postifix SMTP Load Balance

I want to load balance outbound emails between 3 post-fix gateways for sending mails only reason is to use multiple different source IPs to increase throughput & inbox delivery. Each gateway ...
0
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1answer
608 views

SGE Auto configured consumable resource?

I am using a tool called starcluster http://star.mit.edu/cluster to boot up an SGE configured cluster in the amazon cloud. The problem is that it doesn't seem to be configured with any pre-set ...
2
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1answer
608 views

How to set up alerts on Ganglia?

How can I set up Ganglia so that I get an email if a machine in the cluster is using, for example, greater than 95% of physical RAM?
3
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1answer
3k views

JBoss 7.1.1 Clustering, JBAS014775:New missing/unsatisfied dependencies

I am following https://docs.jboss.org/author/display/AS71/AS7+Cluster+Howto I managed to get 2 servers running. One slave. One master. I managed to get to "Dry Run" I got: [Host Controller] ...
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1answer
326 views

Can Windows cluster failover a custom TCP Server application even when Windows itself is working?

I develop a TCP server application that listens to a specific port. One of my users is asking me if my application can run on an active-active Windows 2008 Enterprise cluster. Having only almost no ...
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Windows Server 2012: Possible to have High Availability and reliability without needing a SAN, but connecting servers together?

I have some questions below -- tried to word them the best I could. If you downvote my post, please make a comment explaining why you downvoted so that I can try to do better when I post in the ...
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1answer
498 views

Mysql migrate huge db from innodb to ndbcluster Err: the table is full

I'm trying to migrate old database to mysql cluster (4 data nodes) by using command: ALTER TABLE sample ENGINE=NDBCLUSTER but I'm getting the following error: The table '#sql-7ff3_3' is full ...
2
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1answer
190 views

Tomcat 7 Clustering using IIS webserver

I successfully configured Apche httpd server for load balancing and clustering od multiple tomcat instances on same machine. Now I need to use IIS web server instead of Apache server. How can I ...
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1answer
176 views

How does a SQL Server Availability Group decide on which secondary will become the new primary when an automatic failover is triggered?

How does a SQL Server Availability Group with multiple synchronous-commit secondary replicas decide on which secondary replica will become the new primary when an automatic failover is triggered? ...
3
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1answer
208 views

What is the differences between a Remote File Share Witness Quorum and a Disk Witness Quorum?

Say you set up a Windows Server Failover Cluster consisting of two nodes, on Windows Server 2008 R2 Enterprise. Now when you want to configure quorum you can use either a remote shared folder, or a ...
3
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1answer
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How do I network this Windows Failover Cluster and MongoDB Replica Set? (diagram inside)

As you can see, my two Windows Server Failover Cluster (WSFC) nodes have three network interfaces each, which connects them to three different networks : A public network A private network ...
0
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1answer
79 views

SQL Server 2008 instance's listening on mulitple ports on a cluster [closed]

I have three SQL Server 2008 instances running on a cluster. SQLInstance1 is listening on default port 1433, SQLInstance2 is listening on port 39999 and SQLInstance3 is listening on port 49999. Can ...
2
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1answer
217 views

Should a SQL Server tempDB partition be shared by the cluster?

We have a 2-node SQL Server 2008 RS cluster. The data and log partitions are shared among the cluster nodes. Does the tempDB partition need to be shared as well, or will local server node storage ...
0
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3answers
100 views

Clustering a web server

With 4 servers with OpenSuse is it possible to cluster them all together to run websites? What is involved in clustering and is anything special needed to cluster the machines together so they work as ...
2
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2answers
3k views

Alternative to GlusterFS [closed]

I need to create a redunant 2-linux machines configuration so that the files on server1:/dir are in sync with the files on server2:/dir I managed to configure GlusterFs to do this but while it works ...
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1answer
1k views

Tomcat 7.0 Clustering FarmWarDeployer Not working

I'm currently working on a Tomcat Cluster for Q&A, but unfortunatly, it seems that the auto deploy of a war across this cluster is not working at all. I know the cluster is working perfectly ...
2
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2answers
4k views

How to make a DHCP server on virtual machine serves other virtual machines(on different physical machines)?

I'm building a virtual cluster with VirtualBox and Opensuse. I have 10 physical machines and need several vms on each. The virtual machines are supposed to be in a "private" network, but still have ...
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2answers
234 views

Server Clustering on differen OS : CentOs and Debian [closed]

I have two dedicated servers in two different locations. One at USA (Based on CentOS), another at Asia (Based on Debian). Need to implement High Availability HTTP Clustering. The main complexity is ...
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0answers
67 views

trying to understand network layer(s) in WebAPI server cluster

I'm in the process of building my first webAPI server cluster. The webAPI hosted by this cluster provides a hi-comute resource, where each task request requires between 0.5 and 1.0 seconds of CPU ...
0
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1answer
227 views

Sphinx search on RHEL / CentOS MySQL cluster

Is it possible to add a new resource type to an RHEL or CentOS 6.x cluster, in order to allow Sphinx fulltext search to run alongside MySQL? The clusters are managed using luci/ricci and cman.
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2answers
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csync2 ERROR: Connection to remote host failed

I was unable to find any articles to answer this question, so my best bet was to post this here: Scenario We have 2x application servers in production hosting a PHP website and I would like some ...
6
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7answers
473 views

High availability virtual machines

I've been reading a lot about high availability virtualization, either via Hyper-V or VMWare. In that context, essentially high availability means that the VM is hosted by a cluster of physical ...