Tagged Questions

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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0
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1answer
32 views

TCP Load balancing

I need to implement an architecture that can serve 3 million GPS Devices sending Location Updates/Alerts (every 10 secs) to our system for processing. Features: 1) TCP communication. 1) Long lived ...
-2
votes
0answers
25 views

How are Amazon RDS instances monitored for failover? [closed]

How are Amazon RDS instances monitored for failover across Availability zones? I do not see any type of heartbeat service in place to do this monitoring.
-1
votes
0answers
27 views

Linux http(s) load balancer with webGUI [closed]

I need a HTTP(S) load balancer that works on Linux. Usually I use nginx for that and it works OK, however, this this time the dev team want to manage it themselves and they want a web interface to do ...
0
votes
0answers
42 views

Bottle neck of nginx?

I'm using nginx as a load balancer on amazon ec2 m3.large instance. This load balancer will receive loads from a load generator and distributed them to the 3 instance with mysql database serves as ...
0
votes
0answers
5 views

How to Nslookup server IP and get actual VM IP not LB side virtual ip [closed]

I have a live application with a load balancer configured with a virtual ip on the lb side. When i try to nslookup the dns name , i always get the virtual ip (lb side). Is there any way i can get the ...
3
votes
1answer
49 views
+50

Howto configure apache httpd load balancing with workers that only differ in path, not host?

How can load balancing in apache httpd be configured if the workers only differ in path, not host? E.g. I have the public URL http://www.example.com/myapp and this should be load balanced to internal ...
0
votes
1answer
10 views

Riak setup and LB?

Quick question about setting up riak cluster. Do I need load balancer in front of the cluster ? The cluster will have 3 nodes with N =3, so successful write must have the data in 3 nodes. Any ...
0
votes
1answer
41 views

High Load Website. how to load balancing? [closed]

i have the following problem: i have two servers (intel xeon 3,4 GHZ with 32GB RAM and RAID 10 (4x1TB Enterprise Harddiscs). all servers are installed with vmware esxi 5.5 (free). webserver, ...
0
votes
1answer
35 views

Nginx Load Balancer Optimum Specs

I have 3 Nginx servers and each of them should handle about 2k users (concurrent connections). In front of them I have Nginx load balancer. That's 4 Virtual machines, sharing same subnet and same ...
0
votes
0answers
11 views

HAProxy backend throttling

I'd like to use a similar setting with the one described here to rotate among a set of proxies (not Tor but same idea). One extra requirement though is to throttle requests so that no backend server ...
1
vote
1answer
32 views

Why layer 7 load balancer cannot pass through SSL termination?

I need to share ssl termination task among server farm or multiple processes. In this architecture, there should be a load balancer before this ssl termination task. After looking for an appropriate ...
0
votes
1answer
33 views

Architecting nginx for redundacy

This may be a stupid question, but after googling a while I can't find the answer or just don't know how to ask it. I have a web app running on a server named 'myserver1'. I've brought up 'myserver2' ...
4
votes
2answers
130 views

Scale HAProxy for more than 64k websockets

We are trying to design an architecture that will be able to handle more than 64k websockets. We first tried with Amazon ELB, but its design doesn't allow unexpected spike of traffic nor websocket. ...
0
votes
1answer
33 views

How to achieve stateful fail over when using multiple uplinks?

I have multiple ISP lines over which I am load balancing the network traffic on my linux machine having multiple interfaces ( eth0, eth1 ,eth2, eth3) . This I am doing by creating the routing tables ...
0
votes
0answers
15 views

Fail over in Lokiwall Firewall

I have configured lokiwall firewall on my linux machine having multiple interfaces. Dual Routing works fine. However, I wanted to know how does the fail over happen in case a link goes down. Do the ...
-1
votes
0answers
32 views

How do you troubleshoot Load Balancing performance?

What tools and techniques would you use for analyzing and tuning the performance of a load balancer and the servers behind it? Background I have an ec2 m1.medium ubuntu server running a web-service. ...
0
votes
0answers
16 views

Permanent redirect from machine behind load-balancer

I suppose you've seen questions about Google indexing both the domain name and IP address of a site. I have a similar problem, except there's a load-balancer in between, and I have no access to this ...
-1
votes
1answer
61 views
+50

F5 BigIP limiting the amount of sources able to connect to a virtual server

In an F5 bigIP LTM with sw version 11.4.1, is it possible to have multiple sources addresses for a virtual server? The objective is to limit the number of sources from where the virtual server can be ...
0
votes
0answers
30 views

HAProxy RTMP (TCP) load balancing

I am using HAProxy as load balancer for the RTMP protocol. For now it's working very very good but I have one small problem. I want to send the client's IP on the RTMP request after the load balancer. ...
0
votes
1answer
64 views

nginx proxy_redirect websockets, not proxy

I have been able to successfully set up nginx as a load balancer to proxy websocket requests (with SSL), however, really I think I need to be able to redirect them. My desired configuration is to ...
0
votes
0answers
36 views

Splitting HTTP/HTTPS traffic with SSL Termination in Rackspace Load Balancer

I've got a Load Balancer (LB) set up, with the SSL certificate installed, and a Cloud Server sat behind it serving my site. If I visit a static file in the site, with http:// or https:// it gets ...
4
votes
3answers
503 views

How does Linux distribute load on multiple CPU cores

Let's say I got 2 quadcore processors (8x 2,13Ghz). The server runs multiple programs which can only utilize 1 core + Nginx and Apache worker at the same time. The question is, does Linux efficiently ...
1
vote
1answer
61 views

Scaling a web application horizontally in Tomcat (load balancing / clustering)

I develop a simple REST-style web application consisting of 2 basic modules. Module#1: server exposing REST web services, stateless, deployed in Tomcat Module#2: REST client There is one Tomcat ...
1
vote
1answer
156 views

How to enable stateless session resumption cache behind load balancer?

I scanned my servers' SSL/TLS configuration using https://www.ssllabs.com/ssltest/, and it reported Session resumption (caching) No (IDs assigned but not accepted) I'm using 2 instances of Azure web ...
0
votes
1answer
45 views

multi-wan problems with web services

I recently set up a multi-wan connection for a small company, because they are at the end of the line for any possible ISP, services do go down, and they really depend on their Internet connection. I ...
1
vote
0answers
64 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 ...
0
votes
0answers
33 views

load balance adlds instances over two seperate azure vm's

I have two azure VMs, on which i have hosted two AD LDS instances, one being the replica of the other. I want to ensure load balancing and fault tolerance of the instances (if primary goes down, the ...
0
votes
0answers
41 views

Cannot able to Load Balance on Apache HTTPD Server with mod_proxy_balancer using Balancer Member with SSL Enabled

I am trying to Load Balance on Apache 2.4.7 using mod_proxy_balancer module. My below configuration is working perfectly fine. <VirtualHost *:80> # Turn OFF Forward Proxying or Open Proxy ...
1
vote
1answer
81 views

Keepalived load balancing MySQL. Backup server time-out

Dear beloved people at ServerFault. I'm trying (and failing) to setup a load balanced MySQL server array. Please enlighten me, show me the error in my ways. Current setup: two MySQL servers with ...
0
votes
1answer
69 views

Amazon RDS load balancing and performance

My question is simple. Is it possible to load balance rds (master and read-replicas) using the same haproxy instance used for application load balancing? This would mean that the IP of the ...
0
votes
1answer
55 views

Cassandra 2.x - cluster does not rebalance after adding new nodes

I had 3 nodes, all with ~550GB, and added 4 more. I hoped that data would migrate on its own from old servers to new ones. Unfortunately after one day, data seems to stay in old places. In parallel, ...
-1
votes
1answer
56 views

Why is my nginx load balancer misdirect phpMyAdmin after login?

In my testing server, I have an nginx load balancer pointing to Apache server(s) running on the same machine, and I've installed phpMyadmin under Apache. My nginx config: http { upstream backend ...
0
votes
0answers
39 views

Having difficulties routing TCP via OSPF (quagga) generated routes

I have two isolated virtual machines (srv-a and srv-b) broadcasting their cluster address (10.0.1.253/32) via OSPF. A third virtual machine (router) with IP forwarding enabled is receiving these ...
0
votes
0answers
67 views

EC2 Haproxy stops taking requests

I am using haproxy with Apache to keep alive an EC2 server. Sometimes haproxy stops taking new requests. If I reload haproxy it starts working normally. I have disabled iptables and increased open ...
1
vote
0answers
33 views

Apache ReverseProxy sets upstream server to error when it returns an error page

We are using an Apache LoadBalancer/ReverseProxy to provide a failover for our web servers. Currently we are experiencing the following problem: A webservice call returns an error with HTTP status ...
0
votes
0answers
24 views

Indentifying where a HTTP 503 Service Unavailable is being generated

We have a Web Sphere server that Calls a web service on a Windows machine running IIS. The Call goes via a Blue Coat load balancer. The Windows machine is hosted on VM Ware. What we are seeing is ...
0
votes
1answer
35 views

Unable to use https on Amazon loadbalancer

I have a wild card certificate for a domain and have configured it on a load balancer. The load balancer has an EC2 instance assigned. I am using the domain name to point to the load balancer through ...
0
votes
1answer
173 views

Nginx load balancer is hanging on SSL

I'm trying to get nginx to do load balancing across my web servers, while terminating SSL at the load balancer level. The nginx.conf file I'm using is based on all the guides for doing this exact ...
1
vote
1answer
44 views

Setup an intelligent Round-Robin strategy

According to a lot of research - I discovered the design pattern Round Robin. It basically solves the idea I want to adopt. I want to have a pool with physical servers, each their own IP address ...
0
votes
1answer
60 views

Unable to resolve Amazon route53 domain name to loadbalancer

In AWS I have configured a load balancer to point to an EC2 instance and its working fine. Then I used route53 to resolve my domain to the loadbalancer IP. ex: "api.b1.example.com" The problem is ...
0
votes
1answer
47 views

HAProxy - Will HAProxy automatically reload list files?

I have text files with lists of ip addresses that I want to use to help determine to right actions to take with HAProxy. So if haproxy loads whitelists like this. "acl whitelist src -f ...
0
votes
0answers
28 views

Application Request Routing and Throttling

We have a set of WCF services that are proxying calls to another web service layer built on top of IBM WebSphere. The WebSphere setup is a black box to us, but we're told that we need to throttle ...
0
votes
0answers
40 views

F5 routes all REST requests from one client to same host

I have a rest webservice clustered behind an F5 using SSL Termination, SSL persistence and the balancing is "least connections". This service sees millions of messages per day. The vast majority of ...
1
vote
3answers
795 views

ESXi 5.5 NIC teaming for Load balancing using Cisco Etherchannel

I am using Cisco 3750G stacked switch configured with etherchannel and connected to ESXi Server configured with NIC teaming; Load balancing as router based on IP Hash. Cisco Switch configuration: ( ...
2
votes
2answers
76 views

Static IP in AWS but with possible Load Balance feature

I am playing a bit with AWS. My goal is to setup infrastructure, which will have static IP on outgoing connections (requirement from payment provider which solution has been implemented in our app) ...
1
vote
1answer
23 views

Browser Authentication Prompt After Server Restart

Details We have an internal website. The authentication mode is windows hence it takes windows logins. It is served from two windows servers running Windows Server 2008 R2. And are connected with ...
0
votes
1answer
15 views

Hot-spare using Pound

I currently have a server deployment in which Pound is being used as a reverse proxy (HTTPS -> HTTP) in front of a single server instance. I'd like to add a second instance on a different host that ...
0
votes
2answers
193 views

How do you force an Apache Load balancer to rewrite http 302 redirects to https?

I've got a website that I want to always be served in https. The site is load balanced using Apache. The Apache load balancer is configured basically like so: <Proxy balancer://mycluster> ...
0
votes
0answers
29 views

Maximum server attempts from upstream in Nginx

I have configured Nginx load balancing between backend servers. upsteam backend { server 127.0.0.1:8080; server 127.0.0.1:8081; server 127.0.0.1:8082; server 127.0.0.1:8083; } server ...
0
votes
3answers
66 views

Load balancing for a running server process with sessions

I'm developing a server application that accepts incoming connections and works with client applications. The customer wants to have two machines working: in case one goes offline, the second will ...