Load balancing deal with the techniques involved on using multiple systems to deal with high demands, balancing the load between those multiple systems. Questions deal with networking and server load balancing, using dedicated hardware or not.

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2
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1answer
30 views

Application access via AWS Load Balancer with autoscaling

I am configuring a test AWS architecture for a web application that I plan to migrate from a dedicated hosting service to AWS. What I have now is as follows : One MySql RDS, where my application ...
3
votes
2answers
49 views

How to get name of server that has served request in fronted section?

I need to add server name in response HTTP headers X-Servedby. Is there any way to replace [server] with name of server that has served request? frontend front x.x.x.x:80 default_backend balancing ...
0
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1answer
29 views

Using cloudflare as the only load balancer

Say I have 3 vps nodes in linode to serve traffic on a single website. Linode themselves provides a node balancing solution: https://www.linode.com/nodebalancers But I use cloudflare and was ...
-1
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0answers
11 views

How can I automate a load-balanced Meteor deploy with Docker & Digital Ocean? [closed]

I want to load balance a Meteor app on Digital Ocean. As the mongodb host I would use mongohq. How can I launch a cluster of meteor apps and have them load-balanced automatically (discovering each ...
0
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1answer
37 views

Can apache load balancer find if one of it's balancer members is down?

I need to know if apache can wisely and automatically detect if one of it's balanerMembers is down and consequently exempt it from serving the requests? P.S. The back-end servers won't produce ...
0
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0answers
23 views

Routing tables in OS/X Mavericks - causing traceroute: sendto: Cannot allocate memory

OS/X does most of its routing based on the order of the interfaces in 'Network Preferences'. I need to separate traffic, so I've put the default route first, and then routed traffic to the second ...
-1
votes
0answers
29 views

Network Load Balancing (NLB), how to assign a public IP?

I have two web servers that I am trying to configure in an NLB. I have so far managed to get the NLB working on a private network range but I now need to expose this on a public IP. My servers ...
0
votes
1answer
22 views

Is it viable to run a script that serves images from database?

I run a very dynamic game review site. All the images (screenshots, game thumbnails, user profile pics, etc.) are served via a PHP script on the server. It takes the id as a parameter and reads the ...
0
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0answers
14 views

How can I configure my ASP.NET application to be navigable by IP address instead of URL?

I thought that IP address would always work for navigation to a Web site with a browser. I have rather recently asked this same question where the answer actually worked. See here Can I browse to my ...
0
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0answers
33 views

How can I temporarily disable a backend server in IIS ARR?

I'm using IIS ARR to balance load between multiple backend servers. How can I temporarily remove a server for maintenance, so that it will stop getting requests?
1
vote
1answer
25 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
votes
1answer
50 views

Nginx Reverse Proxy Segfault on High Traffic

Recently my load balancer with Nginx rev proxy showing the following error messages on /var/log/dmesg: [6278902.558300] nginx[15683]: segfault at ffffffffffffffff ip 0000000000457b99 sp ...
0
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1answer
38 views

round-robin director ALWAYS directs request to the same backend

I've set up one server with Varnish as a load balancer and two servers running nginx/unicorn/sinatra for demo purpose. All three servers are accessible! My varnish vcl file: backend web2 { .host = ...
0
votes
2answers
35 views

FTP to multiple servers using one domain without load balancing

So i'm looking into how to allow users to FTP into different servers just through one domain such as ftp.mysite.com. Each of the servers will be unique in a manner of speaking, running their own ...
1
vote
1answer
23 views

Is it possible to set up load balancing and failover simultaneously?

Suppose I have two ColdFusion servers(different machines) running the same application. Now I am bit confused between load balancing and failover techniques. As per my knowledge, FailOver Cluster: ...
1
vote
1answer
93 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 ...
17
votes
1answer
219 views

Outlook fails to connect to a load-balanced Exchange 2013 cluster through Direct Access 2012 R2

We have a load-balanced Exchange 2013 SP1 cluster, running MAPI over HTTP. Client connectivity inside our own network works just fine, while clients connected over Direct Access does not connect. The ...
1
vote
1answer
61 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
1answer
39 views

Apache mod_proxy_balancer + Tomcat load balancing - Should not redirect until web applications are ready

I am using apache2 mod_proxy and mod_proxy_balancer to balance the load to 4 seperate tomcat8 instances on different servers. I am using different AJP ports for each tomcat instance and using jvmRoute ...
0
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2answers
22 views

SSL certs or intermediate for DMZ

I've been tasked with deploying and managing load balancers covering internal servers and DMZ servers. I have no experience with this, and this is a first for my organization as well. Balancers are ...
1
vote
1answer
25 views

Load Balancer Emitting Wrong Time in Http Header

Our intranet web app is behaving very strangely. Very often posting back (asp.net) to save form input end in no-action. After a month or so of on-and-off troubleshooting, I finally got around to ...
1
vote
1answer
62 views

HAProxy max out at ~10,700 connections

I am stress testing ejabberd with Tsung. My EC2 instances setup as follows: Tsung : c3.xlarge ejabberd : c3.2xlarge HAProxy : t1.mirco When I let Tsung talk to the ejabberd instance directly, I ...
0
votes
1answer
31 views

Direct several subdomains to a single backend with haproxy

I'm using haproxy to direct route for several applications running on a single server. For one of the domains in use there are several dozens of subdomains that should be directed to one of a few ...
0
votes
1answer
41 views

How to set up cluster with SESSION replication in Coldfusion 10?

I am not able to set up a cluster with session replication. I have successfully set up a cluster with sticky session. When googled I found a lot of links explaining the same issue, like ...
0
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0answers
13 views

NETSH : Set default ip address for an interface with multiple Ips

To test a load balancer I need to switch my ip address several time a day, and keep other ips routing trough other Wans. I run these commands in a batch script: netsh interface ip set address ...
0
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1answer
48 views

Amazon EC2 Web server in Load Balancer gives 503

we've been running our web servers at Amazon with load balancer and auto-scaling for over a year with no problem. All of a sudden today the request began to get aborted with the error: 503 ... Backend ...
1
vote
1answer
55 views

Replicate data across loadbalanced apache nodes

I am using haproxy that is pointing on 5 apache nodes, the problem is that I want to replicate apache data between those nodes. I have installed DRBD and it worked but on 2 nodes only The rsync is not ...
1
vote
1answer
30 views

Cookies Not Setting in Load-Balanced Environment

I have an Nginx load balancer load balancing two nginx servers serving PHP content (Moodle) up. They share the same database and use the same sessions directory using an NFS share on a separate ...
0
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0answers
13 views

OpenX Requests Multiple Logins on Every Request

We're experiencing an issue with OpenX 2.X and Varnish 3.x. Whenever an OpenX Admin tries to navigate through the backend interface by clicking on any link, OpenX shows the login page. For example, ...
1
vote
1answer
44 views

How to make Nginx fire 504 immediately is server is not available?

I have Nginx set up as a load balancer with cookie-based stickiness. The logic is: If the cookie is NOT there, use round-robbing to choose a server from cluster. If the cookie is there, go to the ...
0
votes
1answer
128 views

Configuring Azure Internal Load Balancer

I am attempting to configure a VNET using the new Internal Load Balancing feature in Azure. I plan to have 2 frontend servers communicating with 2 backend servers over an ILB (Internal Load ...
14
votes
2answers
281 views

Campus Network Design - Firewalls

I am designing a campus network, and the design looks like this: LINX is The London Internet Exchange and JANET is Joint Academic Network. My goal is an almost-fully redundant with high ...
2
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2answers
48 views

responses in nginx load balancing

Suppose I have nginx configured with 3 upstreams, and I make a request to download a file. One of the three upstreams will handle the request. Will the response come directly from the upstream? or ...
1
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0answers
41 views

Remove server from loadbalancer [closed]

Our datacenter is load balancing the traffic to our weblogic servers based on an application deployed on each server called probe.ear It is a simple java app which is accessed by the loadbalancer and ...
0
votes
2answers
45 views

Varnish ACLs Behind Load Balancer Based on Client's IP

In the following setup: Client -> LB -> Varnish I would like to configure Varnish acls to take certain action based on the Client's IP. The LB sends the client's IP in a variable called ...
0
votes
1answer
66 views

Load balancing in Nginx with redirect rather than proxy

I want to use Nginx in a bit of an unconventional way. I want to load balance between a few servers, but rather than proxy content for those servers I want to redirect to them. That is, if a ...
-1
votes
1answer
47 views

What are the practices for load balancing web stats?

I'm admnistrating two servers with LAMPs which I need to set up as load balancing. I was wondering what are the best practices to deal with statistics? my two apaches will generate each their own log ...
0
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0answers
34 views

Cloud load balancers

Can cloud balancers balance HTTP requests coming from a single keep-alive connection? I have 6 machines under LB, and 3 connected clients pumping about 1000 HTTP reqests/second each. I observed that ...
0
votes
1answer
52 views

NLB ARR cross-node setup

Given: one ASP.NET web application 2 Windows servers with IIS installed (no more servers allowed) I want to enable load balancing / failover for that application, on both server and application ...
-3
votes
1answer
49 views

Is it possible to use planet scale load-balanced virtulisation? [closed]

there are more and more implementations of distributed-virtualisation. A common one is Microsoft SCVMM. Currently, such things are kept inside LANs, and a san or fiber-channel system is used for ...
-1
votes
3answers
95 views

Pros and Cons of dedicated Load Balancer vs Round Robin DNS [closed]

2 Apache web servers with identical vhosts to serve a few hundred clients. RHEL 6 on all boxes. What are the pros and cons to having a load balancer with a VIP, and pointing all of the DNS A records ...
0
votes
2answers
43 views

Load balancers and calling external web services

I've tried searching for an answer for this question, but I'm not sure if there is a specific term for it and so far I can't find any information. If I had a popular app that consumed some web ...
2
votes
0answers
112 views

iproute multiple ADSL load balancer through VM

For a long time (2 years?) I have been running a virtual machine (Ubuntu 12.04 server) with a very basic outbound load balancing capability, sending different outbound connections out different ADSL ...
0
votes
1answer
41 views

SSHD to retrieve forwarded client IP

This is my use case: I have a bunch of hosts behind load-balancers and clients SSH through the load-balancer. The LB internally creates a new connection so the connection with the end-host has the ...
0
votes
2answers
65 views

Setting up a LAN with load balanced internet

I have been looking and researching for the last week on this but haven't found anything conclusive which might apply to the situation that we are trying to solve. I have a small start-up which now ...
3
votes
2answers
201 views

Windows Server 2008 R2 Network Load Balancing no balance

I set up a NLB cluster given two servers (WS 2008 R2). Each server has one NIC card which I set up for a static ip address. I assigned the cluster an internet name (MyCluster), and assigned it a ...
1
vote
1answer
81 views

Nginx drops connections

I'm having a setup where I use the linode nodebalancer (loadbalancer) for my nginx/php5-fpm servers. This balancer passive checks. These passive checks, check the status code of requests. If there are ...
0
votes
1answer
78 views

NGINX+Windows how to serve a static html file (100kb) to 10k concurrent users [closed]

This is the NGINX config file: gzip on; gzip_disable "MSIE [1-6]\."; gzip_vary on; gzip_proxied any; ...
0
votes
1answer
173 views

Caching (memcache/redis) and multiple servers - best strategy

We're considering best strategy for using cache (memcache or redis based) in our application (Symfony2). It will be deployed on multiple (so far 3) separate machines with load balancing and separate ...
0
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0answers
338 views

HAProxy configuration for RabbitMQ

I have an API that sends messages to RabbitMQ. I have a high availability RabbitMQ cluster behind HAProxy. When I load test my API I start seeing lots of this: Recovering from a network failure... ...