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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Windows failover cluster - Delegate permissions to Domain user to move a group to another node

Is it somehow possible to assign permisions to non-admin user to monitor and move cluster group? Is there any workaround for this? I'm interested in Windows server 2008 r2 and 2012. I'm avare there ...
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365 views

What is a reasonable latency time for mpdringtest with gigabit ethernet?

Hi I have a small test network that I'm using to do some number crunching for my dissertation. My network consists of three machines with intel gigabit network cards (all em drivers with two hosts ...
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1answer
371 views

What is the best storage for active-active linux cluster? [closed]

We have a cluster with multiple ubuntu machines which are connected to a shared SAN storage. Initially we were using OCFS2 as file system but we were hit with so many issues and we couldn't find ...
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0answers
461 views

Windows Server 2012 - Hyper-V - iSCSI SAN - All Hyper-V Guests stops responding and extensive disk read/write

We have a problem with one of our deployments of Windows Server 2012 Hyper-V with a 2 node cluster connected to a iSCSI SAN. Our Problem Our problem is that for some reason all of the VMs stops ...
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1answer
302 views

Running parallel job in a linux cluster - mpich error

First of all I would like to say it is my first message here and I'm not sure this the right place, I guess it us but... If it fits better in another stackexchange site please let me know. It's three ...
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70 views

OSPF on XEN host running several VMs

Is it possible to set OSPFs areas in a XEN environment to setup a virtual cluster? Main intention is to avoid a external router since all VMs will run inside the same machine.
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1answer
49 views

How do we configure Lustre to block client requests when under load, rather than failing?

We are using Lustre in a cluster with approximately 200TB of storage, 12 Object Storage Targets (that connect to a DDN storage system using QDR Infiniband), and roughly 160 quad and 8-core compute ...
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1answer
350 views

Pacemaker cluster: Xen RA vs libvirt RA

Building a pacemaker cluster to manage Xen domU virtual machines the sysadm can choose between to different resource agents: the dedicated Xen resource agent (ocf:heartbeat:Xen) the libvirt based ...
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2answers
183 views

LVM in cluster — need an advice

I'm trying to configure a 2 node cluster with shared storage, but the configuration is probably little unusual. It is described below: Both nodes have access to a shared storage that has a number of ...
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0answers
209 views

Unable to remote desktop using failover cluster name

I am using Microsoft Failover Cluster and I have 2 nodes - say node1 & node2. The nodes are successfully accessed by remote desktop. but the cluster name is not accessible. The cluster name is ...
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2answers
243 views

SSH into a virtual IP

I am attempting to SSH into a virtual IP on a loadbalancer. I want to connect to this virtual host name and have it connect me to one of the virtual hosts. The problem is when I try to ssh to the ...
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1answer
139 views

puppet templates: possible to print the size of an exported resource array?

I'm writing a puppet module for ocfs2 and making use of exported resources to populate the definitions of all the cluster nodes in the config file on each cluster. This all works well. The cluster ...
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2answers
204 views

Creating New WebSphere cluster

I need to improve WAS perfomance and want to make cluster. I have two separate machines with WebSpphere 7 on it. As I see to do this, I need to add node from my second (remote) WAS to the first one. ...
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469 views

CMAN: using SBD (Storage Based Death) and watchdog as STONITH

I'm building up a 2-node cluster based on CMAN + Pacemaker cluster stack, but I have no hardware STONITH devices. However both nodes are connected to a shared storage via iSCSI and I would like to use ...
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1answer
311 views

Advantage of Microsoft Cluster over Microsoft Network Load Balancer

Till recently, I assumed that Microsoft NLB worked at an OS/Machine level rather than an Application Level. i.e. the NLB just monitors heartbeats on the machine to check if machine is alive and then ...
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1answer
314 views

How to setup cluster of virtual machines to host web application with fail-over redundancy?

I would like to know how to setup a cluster of virtual machines to host a web application. We are expecting a high volume of clients connecting. I would like a cluster of virtual machines (or ...
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1answer
72 views

Highavailability/Global Loadbalancing of clusters [closed]

I know this website 1channel.ch which has like 4 servers in 4 different datacenters across the globe (czech republic, estonia, sweden, germany). What happens is as i am browsing this website the ...
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3answers
498 views

Websphere ND Dmgr - Application Server collocation advantages and disadvantages

In a Websphere Network Deployment Architecture, what would be the drawbacks of collocating a deployment manager server with one or more managed application servers on the same host? In other words, ...
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1answer
466 views

Hyper-V Redundancy without Domain

We currently run a Hyper-V server on a non-domain W2008 server, and are looking to build a failover solution. Because all the (6-10) VM guests are linuxes, and our datacenter space is 90% non ...
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4answers
2k views

DIY Hadoop Cluster - Heat & Dust issues?

Following are links of my DIY 6-Node Hadoop Cluster using i3 Machines, What is the best possible way to protect my design from dust & provide better heat transfer? What should I use to cover ...
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1answer
193 views

HA Options for Windows Servers

We are looking at different options to allow us to stay up and running when our primary datacenter (DC1) goes down for any reason. What is the main difference in having a offsite server updated all ...
2
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1answer
657 views

Microsoft fail over cluster and storage with raid card

I am looking for some input on a Microsoft fail over cluster implementation on 2012. To use the storage and pools it apparently has to have JBODS if your using a raid card. But the LSI card we use ...
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69 views

Application server clustering with no single point of failure

I have a web application, A, that returns a number of files, stored on disk and in memory, based on client device requests. This web application has to scale for a huge amount of users. I am using a ...
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2answers
56 views

SSL certificate on cluster server

could you please advice how to apply SSL certs on web servers behind a load balance server. Do we need to apply SSL certs on all the web servers or apply it to the load balancer only. scenario: if we ...
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1answer
3k views

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
194 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 ...
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1answer
168 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
100 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
39 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
2k 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
442 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
89 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
38 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
389 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
365 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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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
186 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
836 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
324 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
3k 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
81 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
123 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
1k 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 ...
2
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2answers
454 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 ...
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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
3k 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 ...