1
vote
1answer
49 views

How remote instances work on Coldfusion Clustering?

I have just decided to set up my site using ColdFusion clustering in the staging environment. I need to find out what code adjustments are required when we move to a cluster environment. I have two ...
1
vote
1answer
154 views

Load balancing glassfish v4.0 CLUSTER with apache HTTP server: Location of apache

I am teaching myself to build clustered Java EE 7 applications. I am focused on Glassfish Server v4.0. Based on the official documentation (Chapter 7 page 133) , Glassfish can be loadbalanced using ...
1
vote
1answer
74 views

Does ColdFusion single server clustering using multiple instances provides any performance enhancement?

I have few doubts regarding Coldfusion clustering. Is there any benefits of Creating multiple instances of a single ColdFusion server, Create a cluster by adding those instances and host the ...
0
votes
0answers
38 views

Redundant load balancing using Apache

I have a cluster of 5 application servers with a single Apache HTTP server sitting in front of them acting as a load balancer (using mod_proxy_ajp). This works well, but the problem is that the load ...
1
vote
1answer
39 views

How to prevent load balancer from failing?

sorry if the question is a bit ambiguous but it is the first time for me to set up a load balancer and I am a little worried. I want to create a Glassfish Cluster, at the moment I am following this ...
2
votes
0answers
47 views

Multiple httpd with JBoss cluster: provide httpd HA

I have a working configuration like this: +-----+ +-----+ +-----+ +-----+ | i1 | | i2 | | i3 | ... | in | JBoss Cluster +--+--+ +--+--+ +--+--+ +--+--+ | ...
1
vote
0answers
26 views

Difference between all servers in one cluster and more than one cluster with servers? [closed]

Not sure I understand what´s the difference or how it works when servers a running in one cluster or if there are more than one clusters with servers in it - regard High availability & Load ...
0
votes
0answers
152 views

How should I setup outgoing smtp for app emails on load balanced Windows servers

I've recently setup a small group of servers to host a couple dozen asp.net applications that send out emails for things like customer registrations, purchase receipts, error alerts, nightly batch ...
1
vote
2answers
603 views

Graphite/Carbon cluster returning incomplete data

Trying to setup a Graphite/Carbon cluster. I have an elastic load balancer that directs traffic between two nodes in my cluster, each with one web app, relay, and cache. In this example, I sent 1000 ...
0
votes
1answer
323 views

Apache with mod_jk with glassfish instances, large number of established connections for low number of users [duplicate]

I making a tuning for our production servers for a portal, we have 4 servers, 2 for web and 2 for app, and there is a firewall before and after web servers (so yes there is a firewall between app and ...
0
votes
1answer
64 views

Detect if the original node failed in tomcat cluster

I have two nodes in a cluster. Node1 initially servers requests. Loadbalancer redirects the request to node 2 if the first node fails. I would like to know if there is a way for the Node 2 to detect ...
0
votes
1answer
374 views

Session replication in Tomcat

I have setup my cluster with one loadbalancer and 2 nodes with sticky session. I am using mod_jk for loadbalancing. I am having problem with proper session replication. I am using Tomcat 6. When I ...
1
vote
3answers
1k views

mod_jk produces Error smh errno=13

I am trying to use mod_jk for load balancing. Loadbalancer 172.17.8.189 (HTTPD+mod_jk) Node1 172.17.8.193 (apache tomcat instance 1) Node2 172.17.8.196 (apache tomcat instance 2) I checked my tomcat ...
1
vote
2answers
39 views

Certificates for clusters

I have read the various threads regarding clusters (behind the load balancer) and certificates. I am trying to implement this in our company. Firstly Our compnay policy is not to allow exporting of ...
0
votes
0answers
621 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. ...
0
votes
0answers
171 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
620 views

Why do Layer 7 load balancers configuration not require any client configuration changes?

For example, for haproxy (layer 7) load balancing, you only need to configure the "real servers" or "backends" behind the VIP (i.e., cluster IP). E.g.: listen smtp 192.168.3.10:25 mode tcp ...
0
votes
2answers
199 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 ...
1
vote
0answers
74 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. ...
1
vote
0answers
63 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 ...
3
votes
1answer
3k views

Active/Active vs Active/Passive cluster

First time setting up a clustered environment, and have a few questions. From a windows cluster perspective what determines if it is an Active/Active cluster vs an Active/Passive cluster? Is it the ...
1
vote
0answers
358 views

Apache httpd active/passive setup

I want to setup apache web server in active passive mode to support HTTP failover on Redhat linux 5 machine. I understand that 2 Linux boxes can be setup in HA using heartbeat or keepalived. Also, ...
3
votes
3answers
5k 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, ...
-1
votes
2answers
173 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 ...
1
vote
1answer
2k 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
2answers
74 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
6k 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
222 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 ...
4
votes
2answers
946 views

Multiple VPS with mirrored database and filesystem

I've developed interest in VPS clusters lately and it seemed like a great idea to try to set up a multi-VPS setup, which I will describe below. It isn't really meant for production use, but more as an ...
5
votes
3answers
987 views

What to use for software-based shared file storage?

The situation: setting up a load balancer Currently we have all of our servers (running CentOS Linux) in pairs in our data center: each server has a mirroring server. We don't employ any load ...
0
votes
2answers
771 views

loadBalancing/clustering on IIS/ASP.Net/SQL Server

I've to create an offer for a future ASP.NET application. They wants an high availability(99.9%+). So I'm searching the best solutions with .Net technologies(asp.net mvc 3, IIS 7, SQL Server 2008 R2) ...
0
votes
2answers
475 views

How can I make a high available tomcat cluster with no single point of failure?

I've surfed the web and tried to find a way in order to make a tomcat cluster with no single point of failure , and all what I have found is that I need something called dispatcher which will be ...
4
votes
4answers
3k views

Load balanced Drupal servers: a good way to share data among the servers?

I'm trying to get an overview of how i would go about creating a load balanced web server setup. Setting up the actual load balancer and adding two or more web servers seems fair enough. However, I ...
1
vote
1answer
343 views

How do I test load balancing in my LAN?

I recently posted a question regarding the issue of loadbalancing webservers on a budget. It's finally time to begin the testing so I thought about setting up two or more Ubuntu VM's in my LAN running ...
2
votes
1answer
5k views

Tomcat Cluster Farm Deployer issue

I have setup apache-tomcat cluster with mod_jk on ubuntu server. I have some issues with FarmDeployer which deploys war files to other web servers in the cluster and I got some hope that it works as I ...
1
vote
1answer
96 views

Handling log and configuration files when load balancing apache

I asked this question on Stack Overflow, then I released that serverfault would be more appropriate, I apologize if anyone stumbles upon these two issues. So, I am currently rebuilding my web ...
9
votes
4answers
1k views

Advantages of Using Nginx or HA Proxy as Load Balancer

In our environment we us both Nginx and HA Proxy on different clusters. Are there advantages of using one over the other? Or, what is the best way to go about load balancing a basic LAMP server ...
1
vote
2answers
190 views

Multiple Instances, multiple files?

Ok this may seem like kind of a newbie question, but here goes. I'm using Amazon Web Services and created a Elastic Load Balancer for 2 instances that are identical EBS EC2 instances. We'll call ...
0
votes
1answer
77 views

Is it possible to establish more than one load balancer with apache?

I've decided to cluster my J2EE web application using apache mod_jk as a front-end load balancer which redirects requests to a bunch of tomcat6 instances. Something like this. But there is a problem ...
0
votes
1answer
494 views

Ubuntu apache-tomcat webserver clustering/load balancing

I have a Ubuntu production server running apache2 and tomcat6 both on port 80 with mod_jk setup hosting some jsp pages. And also, all the client's informations are stored in the mysql databases on the ...
0
votes
3answers
890 views

Virtual IP or Load balancing for a http/ mysql cluster

First of all i have to say i'm very very newbie as sysadmin. I'm trying to do someone else's work, and i have almost 0 experience in clustering / load balancing and related stuff. This is the ...
1
vote
1answer
1k views

setting up a high speed load balancing server cluster - web/db/NFS

I'm looking for advice on the best way (mainly in terms of hardware) to set up a high speed load balancing server cluster on a budget (say £2,000 - £ 3,000) to host web services behind a single ip ...
1
vote
2answers
3k views

SharePoint 2010 with two application servers

I've been tasked with setting up a 3-tier SharePoint farm. Two load balanced webservers Two applications servers A SQL server Everything is all set up and working with load balancing etc. etc. My ...
1
vote
2answers
659 views

Tomcat clustering/loadbalancing performance in production environment

I have some doubts on the performance of clustering and session management in load balanced environment. Here are my questions: What are the drawbacks of sticky-sessions and session replication. The ...
0
votes
1answer
61 views

How strict are the firewalls between your cluster nodes communicating on the backend?

I have 3 apache servers in a cluster using HAProxy. Currently I allow all traffic on the backend IPs between the 3 servers - I thought about only allowing internal packets on the HTTP ports (and the ...
1
vote
4answers
273 views

HA Proxy won't load balance my web requests. What have I done wrong?

I've finally got HA Proxy set up and running in a way I think I want. However, it is not load balancing the web requests it receives. All requests are currently being forwarded to the first server in ...
1
vote
1answer
95 views

Can I run two virtual Windows Server 2008 machines in an NLB Cluster all on one Windows 7 box?

I am writing a prototype ASP.NET web application that demonstrates the use of distributed caching for scalability purposes. In order to do this, I would like to set up a couple of load balanced ...
1
vote
3answers
2k views

Minimum hardware requirements of a loadbalancer?

I'm going to use a FreeBSD system as a loadbalancer which routes 1gbps public traffic to back-end webserver cluster. What are the minimum hardware specs for this job? Thanks.
1
vote
3answers
303 views

looking for MySQL failover and loadbalace setup for clusting

i have setup my clusting for 3 mysql servers, 1 master and 2 nodes what i need to do right now its setup a failover system and loadbalace setup. Can sombardy link to a good article about that? i use ...
2
votes
3answers
268 views

Shared storage solution for ~200 compute nodes

I have ~200 compute nodes that I run my programs on. When these programs are run, these nodes will need access to a shared location where my data is stored. I need a storage that can house ~3TB of ...