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. The components of a cluster are usually connected to each other through fast local area networks, each node running its own instance on an operating ...
-3
votes
3answers
58 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 ...
0
votes
0answers
17 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 ...
2
votes
3answers
65 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
vote
1answer
29 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 ...
0
votes
1answer
30 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 ...
1
vote
1answer
76 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 ...
1
vote
1answer
36 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 - ...
0
votes
2answers
55 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 ...
1
vote
0answers
12 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
votes
1answer
46 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 ...
0
votes
0answers
32 views
Re-Ask - why would adding a crossover private nic cause IP address resource fail? [closed]
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 ...
2
votes
2answers
30 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
votes
3answers
50 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 ...
-1
votes
1answer
20 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 ...
2
votes
3answers
169 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, ...
4
votes
3answers
144 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 ...
2
votes
5answers
133 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 ...
1
vote
0answers
49 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
votes
1answer
51 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
2answers
57 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 ...
0
votes
1answer
54 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
votes
1answer
37 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 ...
1
vote
3answers
157 views
Cloud Storage as a File Share Witness?
Does anyone know if there is a service out there that can be used as a file share witness for a Windows Server 2008 R2 Failover Cluster File share witness?
I have a two-node cluster but no good place ...
1
vote
1answer
81 views
Lost Clustered disk in Windows 2008 R1 SQL Cluster
I currently am running a 2008 R1 64 bit cluster. Last night I get called by our first tier support that we have a failed cluster disk. At 5PM we received the following error:
Cluster physical ...
6
votes
2answers
240 views
How do Active Directory domain joined computers (native MS Windows or Linux with winbind) determine the closest password server?
How do Active Directory domain joined computers (native MS Windows or Linux with winbind) determine the closest password server? This question implies a cluster with 2+ Active Directory servers in ...
-1
votes
1answer
319 views
Windows 2008 r2 2 node cluster - one node unavailable
I have 2 node Windows 2008 r2 cluster, i failed over service onto node2, restarted node1, and after restart node1 is unavailable. The networks interfaces will not come up and both interface are ...
0
votes
1answer
82 views
What's the best way to manage product images in a Magento Cluster?
I'm running Magento CE on multiple web node.
The Admin Backend is always running on the same server, so all the images are uploaded on this server. On my
0
votes
0answers
65 views
Do I need an SQL Server 2012 / Windows Server 2012 Upgrade Insurance? [closed]
We are a small SaaS company that has until recently participated in Microsoft's Bizspark program. Now that our Bizspark subscription is over, we have a time-limited oppurtunity to buy discounted ...
1
vote
1answer
255 views
Configuring transactional MSMQ on load-balanced servers
I've got a solution running on a single server right now that uses transactional private queues (msmq/wcf). Windows services consume and process messages on the queues, and the web application layer ...
1
vote
0answers
41 views
Resources for setting up clustered FTP servers on CentOS?
Does anyone have any resources that can lead me to a how-to or at least more information on setting up clustered FTP servers on CentOS?
I'm very new to servers in general (all I've done is set up a ...
4
votes
2answers
555 views
How good is failover of the iSCSI target on a two-node linux san?
I'm evaluating the possibility to use two off the shelf servers to build a cheap iSCSI redundant SAN. The idea is to run linux, pacemaker, and an iSCSI target - something like the SAN Active-Passive ...
0
votes
0answers
110 views
Unable to send message through cluster sender - Tomcat 6
We have 2 Tomcat 6 servers in a cluster. Occasionally we get this error, say after every 4 days:
INFO | jvm 1 | main | 2012/01/15 17:43:26.586 | SEVERE: Unable to send message through ...
0
votes
1answer
129 views
Clustering TCP servers, so can send data to all clients
I'm developing a real-time mobile app by setting up a TCP connection between the app and server backend. Each user can send messages to all other users.
(I'm making the TCP server in Python with ...
0
votes
1answer
90 views
Clustered file system on Linux
This is quite a general question but I need some advice on clustering apache linux servers ideally on VM.
I have some apache servers that are being using that are highly used on space (i.e. each ...
1
vote
2answers
51 views
Clustering on Virtual Machine
Can you cluster/load balance on a virtual machine? I figured that would be redundant if the same machine is still performing the work but in virtual areas, or am I wrong?
1
vote
1answer
195 views
Tomcat mod_jk cluster skip 404 http status
I am trying Tomcat Clustering with mod_jk for months and so far not so bad but facing a problem during deployment. I am using FarmDeployer to copy and deploy the WAR to other nodes in the cluster but ...
0
votes
0answers
52 views
Multiple host and cloud network between them, how to properly setup gateway and dnat?
this is the actual configuration:
Host1 (public ip1)
Host2 (public ip2)
each host has these interfaces
bridge vmbr1 (ip 10.8.0.1 on host1, 10.8.0.2 on host2)
bridge vmbr2 (ip 192.168.1.1 on both ...
0
votes
1answer
513 views
Load Balancing and Clustering using mod_proxy_ajp on Apache HTTP Server 2.2.21 and Tomcat 7.0.23
I've been struggling to make load balancing and clustering working using these combination:
Apache HTTP Server 2.2.21 (httpd-2.2.21-win32-x86-openssl-0.9.8r) using mod_proxy_ajp with sticky session ...
0
votes
1answer
57 views
Is it possible to install SQL instances with different Collations in a SQL Cluster
We have a two node active-active SQL Server 2008 Cluster. Running on Windows Server 2008 R2.
The three excisting instances have Latin1_General_CI_AS as the Server Collation. I need to add an instance ...
0
votes
1answer
108 views
Glassfish 3 Cluster and Local init scripts
I'm trying to set-up a Glassfish 3.1.1 Cluster for testing purposes.
Currently, I've got 2 hosts with Glassfish 3.1.1 installed.
I've set-up a DAS domain on host1, and followed this guide to create ...
1
vote
3answers
60 views
Setting up Tomcat on shared drive for clustered environment
We have a production environment with externally load-balanced Tomcat servers running on multiple servers, serving HTTP requests and maintaining stick sessions.
Due to lack of complete build and ...
4
votes
3answers
278 views
Clustering F5 Big-IP Devices; Is it Possible?
I developed a web application. It will run on a farm of five IIS servers. It's absolutely essential that once a session is established with a server in the farm, further HTTP requests within that ...
0
votes
1answer
102 views
Network GURUs - IP failover combined with load-balancing… Is there such software? Is it possible?
I've been playing around with high-availability solutions for a few days and so far I find UCARP very useful for IP fail-overing.
It's dead simple and does the job.
I was thinking about taking it a ...
0
votes
2answers
100 views
Best practices to build a scalable Java webapp
We got this JavaEE WebApp (JSP+Struts+Hibernate+MySQL) which currently is running on a single server. Due to growth of the website and performance issues we've decided to cluster the project on some ...
0
votes
0answers
78 views
gpfs: adding a new nsd server to a cluster
I have a gpfs cluster composed by 10 linux nodes, managed by a primary server A, which also act as nsd server for a first stack of disks.
I attached a new jbod to one of the nodes (call it node B), ...
0
votes
3answers
465 views
Red Hat cluster: Failure of one of two services sharing the same virtual IP tears down IP
I'm creating a 2+1 failover cluster under Red Hat 5.5 with 4 services of which 2 have to run on the same node, sharing the same virtual IP address. One of the services on each node (called disk1 and ...
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votes
2answers
49 views
Good Linux disaster-ready filesystem?
I'm working on this emergency open wi-fi network project and it includes a local website (nginx + MySQL). In order to eliminate SPOFs, we're going to setup at least two of everything (server, switch, ...
1
vote
2answers
223 views
keepalived questions (requirements, abilities, limitations)
1) What are keepalived's (physical/network) requirements? Does the two (or more) keepalived' nodes need to be connected to the same switch? (something related to broadcasting maybe).
2) Can ...
1
vote
2answers
109 views
Webmin Cluster Copy Protocol
Just toying with a clustered server farm for fun (as you do) and experimenting with Webmin and its 'clustered' modules.
It has a feature that can copy files from one server to another on a repeating ...
0
votes
2answers
123 views
How to achieve high availability with MySQL cluster?
This question is not about how to install the servers nor its capabilities, but more of a design question.
So I have a cluster of MySQL servers.
I also have a DNS record "data.example.com".
The ...
