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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How to Reduce Failover Interval in HAProxy?

I have setup HAProxy and it is working fine. I observed that when one of the node goes down HAProxy detects that immediately, but switch-over / redirect existing traffic to the rest of working nodes ...
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410 views

Is it possible to use both an ILB and an ELB (listening on the same port) in the same Azure cloud service?

I'm building a test Lync deployment on Azure; yes, I know this is not supported, hence "test". Lync Front-End servers expose two set of web services, one for internal users and one for external ones; ...
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1k views

nginx sticky sessions / ip_hash with Socket.io

I am to be load balancing two node.js/Socket.io instances on different boxes with nginx running a simple notifications service with a retroactive event for new clients. I don't think there will be ...
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24 views

How to maximize utilization of fluentd server?

I have a fluentd server that is processing an average of 1000 req/s. This server is composed by 32 cpus. In this server are running 32 fluentd docker containers with the same configuration. The entry ...
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26 views

Forbid reviving dead peers in Squid

How, I'm using Squid v3.3.8 and I need to create HTTP rotating proxy server to send all requests through set of predefined proxies (I'm automatically updating squid config to update set of working ...
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49 views

Increase RAM usage for IIS server

I am running a large scale ERP system on the following server configuration. The application is developed using AngularJS and ASP.NET 4.5 Dell PowerEdge R730 (Quad Core 2.7 Ghz, 32 GB RAM, 5 x 500 GB ...
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8 views

Mapping multiple URLs via Google Cloud HTTP Load Balancer to Docker containers on CoreOS

Seeing as CoreOS is designed to run docker containers, I was wondering if there's a way to map Backend Services on a HTTP Load Balancer directly to Docker Images running on a single CoreOS instance. ...
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120 views

Haproxy Nginx/Naxsi to Web servers not working

I have a haproxy/nginx/naxsi setup for load balancing and security. Traffic is supposed to come into haproxy then to nginx/nasxi then finally to the web servers if they passed the WAF. We also have a ...
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153 views

google cloud http(s) load balancing with kubernetes

The documentation here describes how to setup a http(s) utilisation based load balancer with kubernetes on google cloud platform. The question is how it actually manages to do utilisation based load ...
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147 views

Loadbalancing and HA with SolrCloud?

I have a LAMP Application running with solr 3.x on one server for several years now. Now I am migrating due to heavy load to a setup with two dedicated machines where all services are loadbalanced via ...
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344 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 ...
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277 views

Clustering with Jboss EAP and Load balancing with Haproxy

I'm doing load balancing with HAProxy and use JBoss EAP as application servers. The Haproxy server is configured to route incoming requests to the application servers. How can I integrate Jboss EAP ...
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68 views

how to prevent loadbalancer from going offline?

i plan to setup a load balancer for a webproject but there is a major issue in my head: a typical loadbalancer would be: (provided by nginx upstream) Server #1 accepts all requests and forwards them ...
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330 views

WordPress behind haproxy: $_POST being reset

So here's the sitch: Load balancer (haproxy) delivering to 3 web servers and a database server, 5 servers in total with memcache sessions being shared between the web servers. I can confirm that ...
2
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1k views

Varnish 3.0.5 round robin director not balancing

I have an architecture with two varnish servers sitting in front of 5 webheads. Each varnish server is configured with a round robin backend director, but at times of moderate to high load varnish ...
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169 views

Load balacing between balancers using mod-proxy-balancer

Using Apache mod-proxy-balancer, I would like to balance between two balancers. Is this possible? Background: We are in process of upgrading some of our server stack, and for a deployment process we ...
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191 views

Pound sticky sessions between HTTP and HTTPS

I have pound setup for http and https, and have sticky sessions based on cookie for both. However, sessions are not sticky when jumping from http to https. Is there anyway to do this in Pound? It's ...
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111 views

Multiple httpd with JBoss cluster: provide httpd HA

I have a working configuration like this: +-----+ +-----+ +-----+ +-----+ | i1 | | i2 | | i3 | ... | in | JBoss Cluster +--+--+ +--+--+ +--+--+ +--+--+ | ...
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93 views

Load balancing inconsistencies & AD server causing network crawl

We've configured a TS load balancing farm consisting of the Active Directory server which acts as the TS Broker and 6 Terminal Servers who are members of the farm. The load balancing is set to basic ...
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584 views

High latency on domain with CDN

High latency on domain with CDN I have problems with latency on my server, these are the tests I made with blitz.io Latency album http://imgur.com/a/bCmwo I would uploaded images here but it ...
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459 views

How does Round robin policy of MPIO work in Windows 2008 R2

I have a Dell server with a 1G dual port iSCSI adapter. I have installed the NIC driver and using Microsoft iSCSI initiator, map few luns to both the ports and enable MPIO. The target I used was ...
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281 views

Apache as Load balancer - forcing a break in persistent connection

I have setup a load balancer with Apache 2.2 via mod_proxy and mod_proxy_balancer. The load balancing works just fine, but there is one case I cannot find any configuration options for, namely, while ...
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601 views

lvs with NAT routing - horrible performance to one real server

I have an LVS setup with NAT routing and two real servers (as an FYI, we're only routing http on tcp port 80). Currently requests to real server A respond just fine, with page load times of 3-4 ...
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247 views

Cannot browse HTTP to a load balanced VIP from w2k8 boxes, but can get to it from w2k3

I have a strange problem and am looking for suggestions. The environment: several VLANs on the same switch, that all talk to each other via the ASA using hairpin routing: VLAN 500 - Windows 2003 ...
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261 views

WS2008R2 - Network Load Balancing and IIS - I have no idea

I'd like to avoid discussion of IIS ARR for now - it isn't essential to get NLB working. I have two computers (both in the same domain, btw) who are connected to two networks: A private internal ...
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55 views

AWS ELB with SSL backend adds proxy protocol inside SSL stream

Note, this has been also posted in http://thread.gmane.org/gmane.comp.web.haproxy/27737 we are trying to configure this architecture: ELB terminating SSL, using preconfigured certificates. ...
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19 views

Load balancing based on header value

I have apache2 load balancing working perfectly based on session affinity. Traffic does get directed properly to appropriate tomcat server. We are trying to use same servers to serve some REST API ...
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34 views

PgPool2 alternative for load balancing in Postgresql cluster

I'm using PgBouncer for connection pooling, native psql replication in master-slave mode and PgPool2 for load balancing. After a few (many) attempts to get PgPool2 playing nice I give up. To many ...
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28 views

Apache Load Balancer - URL Redirect to internal IP

I am trying to setup a simple Loadbalancer in Apache as below My single node Load balancer is on internal IP 192.168.1.3 with this configuration <VirtualHost *:80> ...
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103 views

Gitlab Images not found with nginx proxy (load balancer)

I have the following nginx config: server { listen 80 default_server; listen [::]:80 default_server ipv6only=on; root /usr/share/nginx/html; index index.php index.html index.htm; ...
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22 views

How to diagnose load balancer fault

I have an apache2 load balancer connected to two servers. Over the past month I have noticed that the load balancer gives preference to one server over the over even though there is no balance ...
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425 views

Exchange 2013 MAPI over HTTP Load balancing HAProxy

We have successfully managed to deploy HAProxy as a Layer-4 load balancer for all our Exchange 2013 SP1 HTTP based traffic (Autodiscover, OWA, EXP, EWS, MAPI, etc.) For various reasons, however, we ...
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67 views

Varnish - behind, in front of, or instead of load balancer(HAProxy/nginx)

I intend to run a few tiny ARM "physical cloud" servers behind a load balancer(either HAProxy or nginx itself), but i can't decide where to put Varnish in the whole mess. I can either have it on each ...
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80 views

Load Balancer Spillover

I want to be able to throttle incoming web requests but when a threshold is reached then I want to return a temporary redirect to a file on a CDN instead of passing the request to the backend. I can ...
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56 views

Security Group of AWS Load Balancer does not forward traffic to backend instance

Before I created the new security group (id sg-abcdefg), I am able to reach the load balance from the IP address 107.178.195.144 via http. The load balancer will then forward the traffic to the ...
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110 views

Google Cloud: Health Check is not removing failed instance from HTTP Load Balancer

I have an instance group with 2 instances behind a HTTP Load Balancer. one instance is up and functioning normally (returning http 200), the other is crashed (HTTP requests timeout). I am not ...
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423 views

504 Gateway Timeout on HTTPS but not HTTP

I configured an AWS Load Balancer. It is working find on HTTP, but when I try over HTTPS I get a 504 Gateway Timeout Error. I tried all the suggestions on AWS's help page (increase idle timeout), but ...
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50 views

Could HAProxy disable the Apache Instance on the same node it is running?

I have a setup with three VMs that are running on a core i74xx. The machines form a LAMP cluster with HAProxy doing the loadbalancing. After running multiple load tests I found out, that throughput ...
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0answers
36 views

Apache and long runnig servlets

I have an webapp deployed on 4 jboss instances and there is an apache 2.2.15 (mod_proxy, libs: DAV/2 mod_ssl/2.2.15 OpenSSL/1.0.1e-fips mod_jk/1.2.31) webserver doing the load balancing. The ...
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99 views

PFSense NATing to a load balanced server

I apologize for not being able to post the network diagram here but as this is my first time asking a question here I am not allowed. So here is the scenario: We have a site that is build with a ...
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0answers
281 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 ...
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91 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 ...
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163 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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40 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 ...
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17 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 ...
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329 views

Haproxy backend server down due to layer 6 invalid response failed ssl handashake?

The scenario is we have two servers which are in different network . We want to have ssl communication from client to front-end and from front-end to back-end ! the front-end able to get ssl ...
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56 views

Apache mod_jk LB synchronization server startup + application startup time

after a long search I can´t found a solution or path to solve my problem with synchronization startup of Apache and Backend servers. I have a Apache2 using a LoadBalancer with mod_jk that balance ...
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513 views

How to get Nginx to quickly switch to backup upstream server?

I've using Nginx to load-balance a websocket app that runs in multiple Node.js instances. When there are thousands of active connections, a single message broadcast could make Node spin in place for ...
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223 views

NGINX + NodeJS Performance Issues

I have one server running a Docker + NodeJS application and a load balancer running nginx. Before upgrading to two servers, I wanted to attempt to replicate traffic statistics for the load balancer ...
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219 views

Load Balancing over multiple ISP connections

I have been trying to implement load balance and fail over on a linux machine having multiple interfaces. Currently I am using two ISP lines and I wish to split the network traffic such that both of ...