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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138 views

load balanced server farm in php with sql

What is the best configuration for a load balanced server farm for a high demand download web page that uses php and mysql. I have servers that currently use centos with lightppd. Has anyone got ...
4
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1answer
562 views

Pacemaker/corosync timeout before resource transfers

This seems like a simple question, but one I can't seem to find the answer for despite going over the pacemaker documentation multiple times. I've got corosync set up with pacemaker to share a ...
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2answers
94 views

Distributed mysql synching

I'm running a server which is connected to an SQL host. I have an another server and I decided to run it as an SQL backup. So, I have 3 of them. Srv A is the SQL host, srv B is the backup. I know ...
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0answers
381 views

Windows 2003 cluster: One node offline causes the cluster service on the other node to fail

I configured a 2 node cluster on 2 Windows 2003 machines with Exchange 2003 The resources: Majority node set Data volume Cluster IP Cluster network name Exchange 2003 system attendant (and all ...
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3answers
734 views

How to failover to another web service automatically?

I've got a 3rd party off-the-shelf windows application that needs to connect to a Web Service (IP address or URL) installed onto another server (actually running on Windows 7 Professional). My user ...
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3answers
72 views

Building right system for my needs [closed]

I will be providing "File-Hosting" service and I need something that works with me along the line and allow the project to expand. At first I was thinking about one big server with RAID 5 as a ...
1
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0answers
775 views

Fence device for RHEL cluster node on vmware workstation

I have a host with Windows 7. I installed VMware Workstation where I have installed two virtual machines. Each virtual machine is a rhel 6.2 node running clustersuite. Do you know which fence device ...
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0answers
232 views

Set total memory limit with Torque

I run a moderately sized cluster and I am having a queue problem. For example I have a node with 128GB of memory and a program that I set the amount of memory per core. So for example if I set memory ...
2
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3answers
207 views

Storage cluster for inexperienced admin

I'm a relatively inexperienced server admin who primarily works with Windows and a little bit of Linux. I'm the only admin of a small organization. I'm looking for a way to have a high-availability ...
1
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1answer
204 views

Howto restart a MySQL MMM cluster

little theoretical question. I'm done setting up a bunch of 2-node MySQL 5.1 clusters user the control of several MMM instances. We started some testing, joyously kill -9 the writer nodes and all ...
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2answers
294 views

wall command + broadcast message not appears on second cluster machine

I have two cluster solaris machine ( machine1 , machine2 ) I have connection between two machines ping and ssh work fine ( cluster is fine ) more /var/tmp/mesg TEST I execute the following ...
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1answer
267 views

Utilising a Magento server cluster to drive hot reindexing

We've asked a similar question in the past, basically we have a very large Magento store with 500000 products which are currently reindexed once a day, during the night. We'd like to speed this ...
1
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1answer
132 views

Hyper-V Manager/Server failover/redirections

I have currently one Hyper-V Server 2008 R2 server installed, it's successfully running 4 VM's, but memory/RAM is starting to become sparse. I actually have a 2nd machine available, so my great idea ...
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1answer
849 views

How do you configure Pacemaker to mount the DRBD data directory on the slave?

how do you get the Slave node of a DRBD pair to mount the data directory so data can be sync'd? I went through the following guide: https://wiki.edubuntu.org/ClusterStack/Natty#Prepare_Partitions to ...
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1answer
1k views

How do you setup a virtual IP on a Linux cluster?

I am having some problems setting a virtual IP and Linux (Ubuntu) cluster and I am hoping someone can help. This is the first node cluster I've tried to setup and I am not finding many resources in ...
0
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1answer
378 views

How to route, using Linux, from nested private subnets to internet [closed]

In our departement we have a blade system with one master node and four slave nodes that are connected to the master node. The system uses its own subnet (192.168.1.x) and only the master node is ...
2
votes
1answer
447 views

Windows Server 2003 on Virtualbox: Disk becomes unavailible after adding it as a cluster resource

I created a test cluster in Windows 2003 running on Virtual Box. The virtual disk to be used as a cluster resource has been changed to type shereable using VBoxManage command line utility. On that ...
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0answers
549 views

Cluster fails because of network loop

We have two hosts running 2008 R2 and Hyper-V. iSCSI SAN using a Equallogic 6k and ps4000 pooled together. They are connected to two Dell 6224 switches. I have one VLAN for the iSCSI and then another ...
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1answer
588 views

Graphite Clustered Webapp - Not Sharing Data

I have Graphite setup on three instances on EC2: carbon-relay - relay1.graphite.prod.example.ec2 carbon-cache + webapp - cache3.graphite.prod.example.ec2 carbon-cache + webapp - ...
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2answers
77 views

Server 2008 Failover

How do I ensure high availability of data on two physical servers in the event one were to fail? I have two Dell T710s, both with Windows Server 2008 R2 Standard. My highest priority is to make sure ...
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0answers
80 views

Service fails to start when failover kicks in

I created a Windows Service which hosts a WCF application looking at/binding to the Clustered MSMQ The Windows service was first installed on both nodes of the cluster. I then created a cluster of ...
0
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1answer
292 views

Windows Clustering newbie

I am trying to setup a simple environment (virtual) to prove that when a Node in a cluster goes down, the other picks up. After much pain I think I may have this however I would love for people here ...
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2answers
157 views

Cloning IP address and/or MAC address for server fail-over

I am currently providing some web applications to my customers (apache/php/mysql on Windows server). I'm looking to provide some sort of fail-over server in the case my server has a hardware failure. ...
0
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1answer
107 views

delete all files on all nodes on a RedHat cluster?

I am developing a program that runs on a cluster and writes a lot of short bits. First, it outputs to the node's scratch directory; when it is done, it rsyncs the files to a hard drive and then ...
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0answers
41 views

Re-Ask - why would adding a crossover private nic cause IP address resource fail? [duplicate]

Possible Duplicate: why would adding a crossover private nic cause IP address resource fail? 2 node Win 2008 R2 quorum cluster Configured 192.168.0.0/24 "public network" Configured cluster ...
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1answer
196 views

Prevent users running processes on cluster head node

What ways are there to prevent users from starting long running, resource intensive processes on the headnode of a Rocks cluster? I've tried: asking politely setting the nice level in limits.conf ...
3
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1answer
674 views

Shared Block Device File System (iSCSI)

I wanted some advice on a file system to use on across 5-10 servers that have a shared block device (iSCSI), GlusterFS and LusterFS seem to be it, but they dont say anything about shared block device ...
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2answers
568 views

Move clustered MSMQ storage location

We have a two-node active/passive Windows 2003 cluster running MSMQ among other things. Windows picked the Quorum drive to store the queue messages, but this drive has VERY limited disk space. How can ...
3
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2answers
82 views

Are there cluster resource schedulers abstraction layers?

I'm writing an application that could potentially be run on any cluster resource scheduler (SGE, LSF or SLURM to name a few of them), using very basic functionalities. I'm wondering if a ...
0
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3answers
298 views

“Virtual” shared storage for SQL Server 2008 R2 Cluster

I am trying to set up a virtual test environment for a SQL Server 2008 R2 Cluster (2 nodes) running on Hyper-V. The cluster requires a shared storage to function properly, however in this test ...
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1answer
117 views

Active node stops resources when pasive node is shutdown

2 nodes, active/pasive. 2 resources, a virtual ip, openLdap, and the nfs mount where openldap saves the data. When both nodes are up, things worked fine. You could move resources away and put the ...
1
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1answer
292 views

Percona XtraDB Cluster with GlusterFS

We are deploying a GlusterFS cluster with 4 nodes, and we want to deploy the Percona XtraDB Cluster on top of it with 4 nodes, each node will have a mounted folder from the GlusterFS, each mount will ...
2
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2answers
575 views

why would adding a crossover private nic cause IP address resource fail?

2 node Win 2008 R2 quorum cluster Configured 192.168.0.0/24 "public network" Configured cluster MSDTC Installed SQL 2008 R2 cluster instance Manually failover groups - OK Reboot server w/o failing ...
0
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1answer
63 views

What's the best management distro for xCat? [closed]

I want to deploy a iDataPlex cluster but using only free software with xCat. The xCat start guide uses Red Hat Enterprise Linux 5 in the management node. What's the best free distro to install ...
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1answer
63 views

Manaul SQL cluster failover on 2008R2

I need to do a restart of the clustered SQL instance to fix a problem with tempDB and i am not sure of the easiest way to do this. We have just upgraded our servers to Windows 2008R2 running SQL ...
3
votes
3answers
6k views

HAProxy cannot bind socket for proxy on a remote machine

I'm using HAProxy to load balance the incoming requests on my two tomcat backend servers. In the config file when I specify HAProxy to listen to the same machine on which the HAProxy is installed, ...
2
votes
1answer
454 views

Using ionice Over Cluster

Background: I use a computing cluster at work (4 slave nodes and 1 head node) that uses the SGE job scheduler. Recently we've been running jobs that do some heavy IO and it has been slowing down ...
4
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3answers
235 views

Converting our budget-strapped dev environment to ESXi - how to maximize availability on the cheap

We've already run through the process of virtualizing our production servers and now we want to do the same with our dev environment. However, our provider took care of all of the ESX host and cluster ...
3
votes
5answers
1k views

How to make AD highly available for applications that use it as an LDAP service

Our situation We currently have many web applications that use LDAP for authentication. For this, we point the web application to one of our AD domain controllers using the LDAPS port (636). When we ...
2
votes
2answers
957 views

Completely Remove an Exchange Cluster even though it's cluster info is long gone?

With the proviso that I realize I screwed the pooch on this, here's my situation. We used to have an Exchange 2003 two-node cluster. Several years back we migrated to Google Apps. When we did that, ...
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0answers
210 views

2008 R2 Cluster not failing over with iSCSI disconnect

So I have successfully set up a 2 node 2008 R2 cluster with SQL Server 2008. There are basically 3 networks. Public (client LAN) Private (Heartbeat between the two machines) iSCSI SAN (hosts ...
0
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2answers
65 views

Adding MySQL servers/ data nodes into database clustering without restarting mysql cluster

I currently have mysql clustering up and running. For high scalability is there a way to include either mysql node, data nodes, or management nodes without restarting the entire cluster. I wish to ...
1
vote
1answer
272 views

Adding MySQL servers/ data nodes into database clustering without restarting mysql cluster

I currently have mysql clustering up and running. For high scalability is there a way to include either mysql node, data nodes, or management nodes without restarting the entire cluster. I wish to ...
0
votes
1answer
707 views

Plesk CP with a linux cluster [closed]

I've managed to start a project where i should be implementing a linux cluster mainly for webhosting. I need to run plesk on top of that cluster in order to provide cps to customers but there seems to ...
1
vote
1answer
312 views

Linux HA - Best Heartbeat hardware solution

Hi all I would ask anyone what is the best layer 2 medium for heartbeat in Linux and how it's best configured. More precisely I've been thinking about a dedicated NIC for that purpose but then i ...
5
votes
2answers
11k views

How to setup STONITH in a 2-node active/passive linux HA pacemaker cluster?

I am trying to setup an active/passive (2 nodes) Linux-HA cluster with corosync and pacemaker to hold a PostgreSQL-Database up and running. It works via DRBD and a service-ip. If node1 fails, node2 ...
1
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2answers
734 views

How to correctly set up iWARP? Preferably on loopback

iWARP is a protocol for doing remote direct memory access (RDMA) on top of TCP/IP, so that it can work with Ethernet and other network types as opposed to Infiniband. It works with many of the ...
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2answers
178 views

Server Cluster Design/Setup [closed]

OK So I am not sure if this is posted already but let me explain my goal and what I am trying to do. Really need some help on this as I am not really linux or server savvy yet. I know the basics with ...
0
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1answer
106 views

Cannot resolve cluster resources on EC2?

I have created this cluster on Amazon's EC2 service. I can connect to the sql instance from the first node (there is only one node in the cluster at this time) using the cluster name, so I know that ...
0
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1answer
172 views

Unable to connect to MySQL cluster database

I am unable to connect to mysql cluster database after starting my management node, data node, mysql node. I made the necessary changes by adding the loadbalance in the dbURL. But I am not able to ...