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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26 views
Redhat cluster not working
I have 2 services "Cache" and "Postgres" running in cluster for 2 linux server nodes:
Member Name ID Status
------ ---- ...
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0answers
22 views
tomcat 6 horizontal clustering?
Please see my previous question.I didn't get any answer and the answer was not helped.That's why I created a new ...
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0answers
18 views
Mysql Auto-Sharding [duplicate]
MySQL ndb cluster is supposed to auto shard the table data between nodes, however after setting up MySQL ndb I have added about 2000 records to the table. after looking at each data node i see that ...
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0answers
41 views
Confusion setting up a simple tomcat6 clustering on ubuntu 12.04 using mod_jk: status page won't show
am a little confused when setting up 2 tomcat6 instances cluster in a clean ubuntu server 12.04. i didn't install default tomcat6 i used tomcat6-user's tomcat6-instance-create to create 2 instances. ...
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1answer
35 views
Memcached distribution
I have a question about memcached distribution across nodes. We have 20 memcached nodes with 200GB memcached on each. Our apps are PHP apps.
$memcache->setOption(Memcached::OPT_DISTRIBUTION, ...
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0answers
32 views
What is a logical web address, when using a loadbalancer for distributing load among clustered web applications?
In Oracle docs, I keep coming across the term 'Logical web address (LWA)', and this concept is especially useful while setting up a load balanced application.
I couldn't find any documentation on ...
2
votes
1answer
85 views
HA mail server configuration
I have a mail domain and two servers (machines) with Centos 6.4 and public IP addresses. Postfix mail server and Dovecot IMAP/POP3 Server are installed on both.
How would I set them up redundantly so ...
0
votes
1answer
53 views
In search of a distributed file-level filesystem [closed]
I'm looking for a distributed, fault-tolerant file-level (not block-level, preferably) filesystem for use in a small Linux-based HA cluster of sorts. The files that are stored will be fairly small ...
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0answers
19 views
SQL 2012 AlwaysOn cluster only fails over one way
I have a two node SQL 2012 cluster running on Server 2012. It is set up as node majority and there is no shared storage.
Both are virtual machines, the problem is whilst testing the failover I came ...
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0answers
28 views
Can i use a Non transactional Queue with a Clustered BizTalk and Clustered Msmq setup?
We have a setup as follows:
Two (clustered) BizTalk (2010) servers
Two (clustered) Msmq servers
Now i need to use a non-transactional msmq Queue, so i can use priority in this queue. The messages ...
0
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0answers
26 views
Vyatta cluster nodes stuck in transition
We're running across a peculiar issue:
We have a redundant pair of firewalls running Vyatta 6.5 VSE which are clustered together in an active/passive pair.
However, when we recently tried to fail ...
1
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1answer
28 views
Red-Hat Cluster failover notification?
Is there anyway to get a notification / setup a notification mechanizem when the cluster fails over?
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2answers
83 views
Autoscaling set-up on EC2
I'm new to web development and design (I moved over from construction where answers are much larger), and I'm trying to build a scalable AWS architecture for a Wordpress site that lives in the free ...
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1answer
36 views
Networked Lock Management for Linux [closed]
I help manage a linux based cluster doing parallel testing. We are currently using MySQL's named locks for doing distributed lock management. Since you can only keep one mutex per mysql connection, ...
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0answers
8 views
How to use RELAY2 protocol in JBOSS AS7?
I have two domain .
First domain with four node A+B+C+D.
Second domain with three node X+Y+Z.
In first domain A is domain controller.
In second domain X is domain controller.
To achieve cross site ...
1
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1answer
75 views
RabbitMQ - unexpected empty and unsynchronized queues after cluster node failure
I have downloaded and installed RabbitMQ in cluster on Windows:
downloaded and installed ERLANG and RABBITMQ on two servers (for example Alpha and Bravo)
installed management plugin, set custom ...
0
votes
1answer
41 views
What is the best configuration for building a cluster pc with a limited budget? [closed]
I’m looking for the best computer configuration to build a computer cluster. This computer cluster is going to be used for a search engine which uses a lot of quick-access I/O operation, so my top ...
3
votes
2answers
198 views
How to properly shut down Windows Server 2008 R2 cluster?
We need to shut down MS Failover Cluster running on two nodes with MS Windows Server 2008 R2 Enterprise for hardware maintenance.
I recently came across two possible approaches on how to shut down ...
4
votes
1answer
186 views
Linux Filesystem options for iSCSI shared storage
I am trying to determine my 'best choice' for a filesystem to use for a shared storage device that will be mounted via iSCSI across an indeterminate number of servers.
Setup:
27TB Synology RS2212+ ...
6
votes
2answers
530 views
Are ZFS clustered filesystems possible?
Is it possible to create a ZFS cluster? Or would you need to go the seemingly ugly (to me at least) route of ZFS with UFS formatted pools governed by GlusterFS?
The idea is to see if it is possible ...
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0answers
24 views
Server scailability for WebApplication ( SaaS ) running on VMs - Ubuntu [closed]
This is a little broad and I don't want to get closed for promoting discussion rather than getting straightforward answers so let me narrow this down while keeping it general enough that it would help ...
0
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0answers
60 views
Convert clustered LVM volume group to stand alone
I am running clustered LVM, and I need to convert my cLVM VGs back to stand alone. It appears that I should be able to run "vgchange -c n " with out losing any LVs. The only thing I need to do is ...
1
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1answer
118 views
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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0answers
24 views
cluster name object missing from domain
Need help in bringing failover cluster online. I found that the CNO is missing from the AD.
Can somebody help me in bringing the cluster name online?
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0answers
29 views
Announcing a node's IP to the cluster
I'm in the process of configuring a sort-of Beowulf cluster, the major difference being that I want to be able to add nodes from any network. Because of this I can't run DHCP on the server to ...
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0answers
35 views
How to unregister slave node from the cluster using “JBoss Application Server management API”?
Using Jboss as7.0.2.Final we have created cluster of four Node N1,N2,N3,N4.
Here N1 is master Node.
After creating cluster of (N1+N2+N3+N4) there is requirement to Unregister slave Node N2 from ...
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0answers
22 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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0answers
50 views
Can Tomcat Cluster/Farmwardeployer be implemented without session replication?
We have multiple tomcat nodes behind a load balancer and are looking at options for automated deployment. Our apps are stateless and we don't want\need the added overhead of session replication, but ...
0
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2answers
90 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 ...
0
votes
1answer
47 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.
...
1
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1answer
93 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 ...
0
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0answers
67 views
MS Cluster Core Resources IP Address VS Service Resource IP Address
Basically I'm completely naive in clustering. However I have to install an application that connect to a Sybase DB running inside MS Clustered environment. The cluster environment was setup by my ...
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1answer
62 views
Websphere ND Dmgr - AppServer collocation 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, ...
0
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1answer
75 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 ...
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0answers
29 views
Partial mail sync for multi continent mail server expansion?
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 ...
2
votes
1answer
282 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 ...
2
votes
1answer
663 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] ...
1
vote
1answer
121 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 ...
2
votes
1answer
75 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 ...
3
votes
1answer
121 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 ...
0
votes
3answers
90 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 ...
3
votes
2answers
1k views
Alternative to GlusterFS
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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0answers
149 views
Windows Clustering: Drive resources not showing up on inactive node
I have a Production and a QA Windows 2003 R2 sp2 cluster setup with two hosts assigned to each. On the QA cluster, the inactive node shows the disk drive letters in My Computer, but the production ...
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0answers
416 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 ...
1
vote
2answers
156 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 ...
1
vote
0answers
52 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
votes
1answer
125 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.
5
votes
7answers
426 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 ...
1
vote
1answer
520 views
Cannot WMI Query root\MSCluster namespace as Local Admin
I'm trying to use WMI Explorer to query the root\MSCluster namespace on various hosts to obtain cluster resource group and resource object data. I can access the namespace with no issue on Win2K3 ...
1
vote
1answer
39 views
Is MySQL Clustering a viable option for a DB expecting 5TB of data in 5 years?
We plan to implement MySQL Clustering.The database should support 5 years of data and expected data/year is 1TB.
When we created a test enviornment with the DB size as 200GB, NDB Cluster took more ...
