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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ESXI 5.1 not balancing CPU load across all cores/threads

I have 2x servers with 2x E5645 (6c/12t). I am running own software which is processing millions of entries from database (database holds compressed big chunk of data in each row, software is ...
0
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33 views

Google Cloud HTTP balancer returns 502 error

I have 2 Instance groups and HTTP load balancers for each one. Instance groups contain VMs that work on Windows Server 2012 with IIS inside. When I send POST request from VM from one instance group ...
1
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0answers
25 views

Setting up a caching system r/w in DCs across continents

We are going to implement a caching system to make our front-end servers which are located in different data centres in Asia, America and Europe can read and write some small JSON data in the shortest ...
0
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1answer
19 views

RTMP load-balancing via HAProxy

I've got a little problem to solve: I need to find a way to load balance, bandwidth-wise, the incoming RTMP streams on my servers. I have 2 RTMP servers (nginx-rtmp), let's call them S1 and S2. The ...
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30 views

DNS Based Load balancing on squid - odd issues

I'm attempting to do round-robin DNS based load balancing for two squid boxes running as simple HTTP(S) proxies. For testing I'm using AWS Route 53. To simulate round-robin I created two records ...
3
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1answer
58 views

How does nginx distribute traffic among IPs associated with an upstream DNS name?

With this configuration: upstream some_upstream { server some-elb.us-east-1.elb.amazonaws.com:80; } If some-elb.us-east-1.elb.amazonaws.com maps to 2 IP addresses, how will nginx distribute ...
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27 views

What load balancing configuration should i use? [on hold]

I am currently working on a system where we have three servers; one load balancer and two servers containing sites. After having some issues, we are looking into reconfiguring the setup. We are drawn ...
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41 views

One server down - load balancer not redirecting

I am currently having an issue with one of our servers. This should be fine as we have a load balancer set up which should redirect the requests to the second server. This however is not the case. Any ...
0
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1answer
31 views

How to do load balancing with nginx

I need to use server as load balancer and web server at the same time. Here is my nginx config for website: upstream load_balancer { least_conn; server localhost; #server ...
0
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1answer
27 views

HAProxy parsing errors

i have 3 servers --> haproxy - server1(uk) - server2(ru) i followed this tutorial and created ip for ru.subnets now in my /etc/haproxy i have these files: haproxy.conf ru.subnets ...
2
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1answer
41 views

HAproxy mysql failover

I try to set up a HA cluster with Percona xtraDB Cluster for MySQL replication and HAproxy for load balancing. HAproxy works really good with apache, when apache crash or if it's not responding, ...
0
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1answer
20 views

Azure, internet facing load balancer without using cloud services

Is it possible to have load balancing between virtual machines without placing the machines in the same cloud service? We want to use Ansible to configure our machines and setup RabbitMQ but I can't ...
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2answers
48 views

How do you Mask URLs in HAProxy?

Is there any way to do URL masking in HAProxy? I'd like to have a URL directing to my load balancer, i.e. www.example.com, redirect to another URL I have for another application. However, I'd like the ...
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0answers
23 views

Azureloadbalancer v2 does not balances traffic

I am trying to use new Azure feature - Loadbalancer v2 with Virtual Machines v2 due to very easy and templatable provisioning. However, load balancer does not allow traffic on port 80 to my machines. ...
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0answers
18 views

Correct way to load balance a node app in opsworks

I have an Opsworks stack with 2 different node apps running in the same layer. One of these apps needs to be load balanced as it will be accessed by the general public, but the other is only accessed ...
0
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1answer
37 views

Nginx upstream fails over from serverA to serverB, and then back to serverA, why?

Background I have the following Nginx configuration which is load balancing 2 Tomcat servers running on 2 different servers: ### http://nginx.org/en/docs/http/ngx_http_upstream_module.html#hash ...
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1answer
34 views

Internal Failover Load Balancing in Azure

I have a MongoDB Cluster deployed in Azure. Normally a MongoDB cluster has at least a couple of mongo router instances (mongos) which is where an application should connect (the application is also ...
0
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0answers
21 views

Mapping uWSGI processes to specific cpu cores

I have 2 sites on my server (debian) with 4 cpu cores. For both of them I use workers=2 and cpu-affinity=1 so workers are mapped to cpu 0 and 1 for both sites like that: spawned uWSGI master process ...
0
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1answer
46 views

What is Refs column on varnishadm backend.list command?

Below is a command output example: varnish> backend.list 200 Backend name Refs Admin Probe webserver01(172.31.30.167,,80) 7 probe Healthy 6/6 ...
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1answer
19 views

Wordpress on stage environment with SVN

Currently we have this configuration for our website: Stage environment. On this environment we use a connection to live DB and for code we use SVN. Production/Live environment. Load Balancing ...
1
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0answers
48 views

nginx load-balance set weight and ip_hash at the same time

By default the Nginx upstream directive uses Round-Robin to distribute requests to backend realsevers and set the weight of the server by weight. But I do not see any words about whether weight works ...
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45 views

Error 499: Varnish is working how load balance Nginx Webservers

I created a solution to host a magento store with high traffic (> 500 user simultaneously) on AWS. Too often HTTP 499 error appears in the access.log the Varnish. When this happens users who have such ...
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0answers
24 views

Automatically upgrade virtual machine in load balanced set on Windows Azure

I have been serving web content off of a Linux VM running in Windows Azure, and now want to make a duplicate virtual machine and create a load-balanced set to handle more load and avoid downtime. I've ...
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0answers
22 views

Unable to understand site structure in server

I am working with an Apache load balancer and two tomcat servers. When i was adding a new site.conf to /etc/apache2/sites-available I noticed some discrepancies in the server name and server alias of ...
0
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0answers
33 views

How to check if connection is working before load balancer decides which server to use

I am working on a project whereby we deliver a secure site for our customers. We host the sites on two servers behind a load balancer but have port connections (24000-24100) to each database. The ...
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1answer
84 views

Application Fail over not working in apache 2.2 web server configured with BIG IP (f5) load balancer

I am using Apache 2.2 in front of my JBOSS 5.2 application server in a cluster configuration . The two nodes of the cluster configuration resides on different host . This configuration is hosted on ...
2
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1answer
49 views

Load Balancing between 2 ISPs

I'm having 2 ISPs, need to balance traffic between the internal users ... Firewall is SRX210 The question is: Each ISP has there own DNS, how to make the dns resolving based on the used ISP? ...
1
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1answer
101 views

Is having the same PTR hostname valid for multiple ip addresses? [duplicate]

Currently I have the following setup with two hostnames and two ips: cheeze1.mydomain.com IN A 123.123.123.111 111.123.123.123.in-addr.arpa IN PTR cheeze1.mydomain.com cheeze2.mydomain.com ...
0
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1answer
53 views

Single Nginx Load Balancer for 2 different clusters (web, api)

I was wondering if it was possible to use a single Nginx server to load balance my web servers and api servers if both are using port 80. In this setup there would be 5 servers, 1 Nginx and 4 Apache ...
0
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1answer
96 views

Moving a web application to use HAProxy, Varnish, and nginx

I currently have 4 web application servers (running on application) on Rackspace that sit behind a Load Balancer (on Rackspace). In front of the Load Balancer. The application itself makes moderate ...
1
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1answer
37 views

POST of large file is timing out, when running through ARR

When POST'ing a large file through ARR, the request times out after 120 seconds. The client recieves error code 502 Bad Gateway. I have configured the "proxy timeout" of the web farm to be 600 ...
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0answers
14 views

mod_proxy_balancer does not remove dead servers

We use the current configuration (slightly obfuscated) to balance 2 web servers against 4 application (Tomcat) servers, using JSESSIONID; each web server has this exact same configuration for ...
0
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0answers
32 views

Load balance and contingency server

everyone. I'm having trouble setting up a load balancing/contingency server. My scenario: I have 2 servers (Windows 2012 R2 machines) to run an application in ASP.Net/C#. My problem: Would I like to ...
0
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1answer
45 views

Does Nginx keep the connection open, when it does load balancing?

I have a single Nginx server doing load balancing to several upstream servers. What happens when a request comes in? Does the load balancer keep the connection open and wait for an answer from the ...
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43 views

Elastic Load Balancing report Out of Service

I am using the loadbalancing and autoscaling feature on aws. The load balancer marks the instance "out of service". However, the instance (i-xxxx) is running fine and status checks that report ...
0
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1answer
46 views

What product is AWS Elastic Laod Balancer behind the scenes [closed]

Does someone know what kind of product is working behind the scenes as AWS Elastic Loadbalancer? Could likely be something as haproxy, nginx, etc. Does someone know more respectively has any proof ...
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1answer
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I wonder, How does a load-balancer manages the session?

HttpSession is stored in Servlet container i.e. web container. Load balancer does not maintain Web container, it just push the request to web containers which are under the load-balancer. My Question ...
1
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1answer
82 views

Nginx Load Balancing proxy confusion

I'm currently trying to setup a load balancer for a bunch of download mirrors. While reading into this subject I saw Nginx lends itself perfectly as a load balancer, great! But when looking at the ...
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0answers
14 views

Php load balancing questions

I have a custom written ecommerce app that runs on it's own dedicated server. All of it's constants (such as database connections, file paths etc..) are defined in a single _constants.php file. The ...
2
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0answers
85 views

Sticky sessions with Apache load balancer for Socket.io 1.0

I've been messing around with Apache as a load balancer for my Socket.io server. I went through the following topic and now everything seems to be fine. Configuring Apache 2.4 mod_proxy_wstunnel for ...
0
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1answer
37 views

Apache SSL Errors every 30 seconds

I have three load-balanced Apache 2.4.6 servers running on fresh installs of CentOS 7. The load-balancer is a Barracuda 340. I know its old, but it's more than capable of handling the traffic, and ...
9
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3answers
286 views

How to make redundant load balancers?

I understand that the purpose of load balancers is to balance load between your servers and keep track of instance health, etc. But what if load balancer itself fails? How do you set up redundant load ...
0
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1answer
133 views

Redis high availability and load balancing

I'm using Redis for some time and now we want to move to a redundant cluster which would be fault tolerant, highly available and load balanced. I principally use Redis for some PHP web application ...
0
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1answer
96 views

ELB Https with HTTP on backend using Tomcat without nginx or haproxy

I want to setup ELB to terminate SSL at load balancer and communicate with backend instances over HTTP. I have uploaded valid certificate on ELB. When I set up following configuration ELB - HTTPS ...
0
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0answers
34 views

F5 Irule to Netscalar olicy

I am new to netscalar, Can someone tell me how to convert the below F5 irule to netscalar policy. F5 iRule: when HTTP_RESPONSE { if {[HTTP::cookie exists "e1AppState"]} { if {[HTTP::cookie ...
1
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1answer
93 views

Gracefully take a server out of Azure Load Balancer (drain stop)

We have an application deployed to Azure IaaS VMs, served by IIS. In order to install updates, we need to take each machine out of the load balancer, one by one. Before moving to Azure, we were using ...
0
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1answer
26 views

Haproxy dynamically promote backup server to master

Let's say if I have two mysql databases, db1 and db2. Is that possible to configure haproxy to work like that: In the beginning: db1 work as master and db2 as backup. The haproxy will promote db2 ...
2
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2answers
53 views

Setting up load balancing on 3 apache servers

I want to set up load balancing on my 3 Apache servers that I have created. The 3 addressed that I have used for the server are, 192.168.151.101, .102 and .103 I have then created a load balance ...
2
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3answers
69 views

Filter network traffic through 2 WANs depending on IP?

I've searched thoroughly in an attempt to find a similar question here, but aside from finding information about pfSense (which appears to only support 1 WAN?) I can't find much else... Our current ...
2
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0answers
56 views

using apache2 mod_proxy(_balancer) for 3+3 tomcat failover configuration

we have got 3 active Tomcat instances, the load should be distributed evenly amongst them (sticky sessions via jvmroute, ajp). We also have got 3 failover Tomcat instances running. If one of the 3 ...