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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3
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2answers
1k views

Force DHCP Reservation Updates to Secondary DHCP Server in Windows Server 2012 R2

I have setup and configured two DHCP servers on my private network in load balancing mode as outlined in the following technet article: http://technet.microsoft.com/en-us/library/dn338979.aspx Both ...
1
vote
1answer
29 views

“Connection” HTTP header in load balancers

Do load balancers remove the HTTP header indicated in the "Connection" header? As far as I know, headers indicated in the "Connection" header are not supposed to be populated further than the first ...
0
votes
0answers
71 views

Does TMG allow a no (session) affinity configuration

We are using TMG load balancing but it currently is using session affinity via a cookie (ISAWPLB). We don't want any affinity as our application is stateless. This way we would get a much better ...
0
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0answers
204 views

HAProxy halts after ~8000 benchmarks

I'm running 1.4.24 on OS X 10.9 in front of 3 local servers, which work together to formulate a response, and thus HAProxy has no speed advantage over just hitting one of them, but handles node ...
0
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0answers
101 views

Tomcat fails to return syn requests to F5

I have an F5 LTM sitting in front of two tomcat servers which host 4 applications. When I initially create the pools and add the members to the LTM I can hit all applications. This is the weird part, ...
0
votes
1answer
120 views

Multiple Amazon EC2 instances for a single application [closed]

I'm new to AWS and currently using a single m1.medium EC2 instance to run an application. I've been reading up on AWS terminology, but there's one thing I haven't gotten a clear answer on. I know how ...
1
vote
1answer
273 views

Load balancing architecture: sticky sessions and dynamic backends

I'm struggling to find a solution to a specific load balancing requirement. It seems that various combinations of HAProxy, Nginx, Varnish and Apache's mod_proxy_balancer can do some but not all of ...
0
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0answers
83 views

set up apache mod_proxy_balancer on Cloud for sticky sessions without route and jvmRoute

In order to get Apache working with Tomcat sticky sessions using mod_proxy_balancer, we need to configure a route in the Apache conf and a matching jvmroute in Tomcat's server.xml I need to set up ...
-1
votes
1answer
71 views

separate mysql server and webserver and consequences [closed]

I have a web application. bought a pretty strong server for it. Server specification is below: CPU: DUAL E5-2620 RAM: 32 GB DDR3 HDD: 2 x 300GB SAS 10K Network: 100mbps/10TB internet. WebServer ...
1
vote
2answers
2k views

HAProxy Url pattern forwarding

I am using HAProxy for load balancing a couple of web servers (HTTP mode). The web servers are strictly dynamic, ie, there isnt any static content, only web services. The URLs of the type (analogous) ...
2
votes
0answers
87 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 ...
0
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0answers
246 views

haproxy stick on src doesn't work

I've following setup: HA-Proxy version 1.4.24 2013/06/17 I am using it to balance load on my Windows terminal services, with following configuration: global log 127.0.0.1 local2 ...
0
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0answers
88 views

Pound: address already in use

Below is the config that I use in pound for load-balancing a set of Tomcat. To get started I just used one tomcat instance. The URLs that I want pound to forward is of the type ...
0
votes
1answer
358 views

Load balancing with Piranha+Pulse stopped working after 'yum update'

We have been successfully using the load balancing system Piranha+Pulse for 15 months on our CentOS 6 system. We use it to load balance two web servers. Note that our web servers are also our load ...
0
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0answers
49 views

Remap.config in Clustered mode ATS

I have a cluster of Apache Traffic Server. These are operating as reverse proxy for a set of tomcat instances, each having, say 5 servlets. I need to configure the ATS in such a way that there is ...
1
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2answers
78 views

Solution to download multiple files for thousands of users

We have a business need and should allow 2000 PCs to download 150 - 200 Mb (10 - 20 files) as fast as possible. The download will start when something from server will trigger it. All PCs are pooling ...
0
votes
2answers
305 views

how to configure Apache httpd.conf for x-forward logger

I would like to configure my httpd.conf to see the client IP address and some more information. this is what I have: LogLevel warn LogFormat "%{X-Forwarded-For}i %l %u %t \"%r\" %>s %b ...
2
votes
2answers
151 views

LoadMaster shows server as “UP” but I can't access

I'm setting up load balancing through KEMP LoadMaster. I've setup everything and got to the point where real servers are up, virtual server is up, ping works but http request doesn't go through. ...
0
votes
1answer
285 views

Nginx byte-serving http requests

I know it is possible to use Nginx to spread requests over multiple web servers thus doing load balancing. This solution requires back-end servers having high bandwidth and is effective when dealing ...
0
votes
1answer
242 views

Issues Load balancing .Net web app using State Server

We have multiple web servers behind a Netscaler load balancer. The (Win2008) servers each host an ASP.Net application (using iis 6.1) that are configured to use a central server running the .Net ...
1
vote
3answers
73 views

How to share Apache2 virtual host configuration between two linux servers?

What is the best option to share configuration directives between Apache2 servers. This is required in order to employ stable load balancing. The most important directives are those that define the ...
4
votes
1answer
254 views

Preserve response headers in NGINX load balancer

I have set up NGINX as a load balancer for two Domino servers this way: http { upstream www.mydomain.com { server 1.1.1.1; server 2.2.2.2 backup; } server { listen ...
1
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0answers
565 views

Nginx load balancing redirects to upstream “name”

Introduction: Please read this serverfault question on nginx load balancing issue with 301 from backend. Somewhat similar to my problem, but the answer doesn't work. Nginx is redirecting to the ...
4
votes
2answers
663 views

How to scale up a web server supporting long polling

I am planing to add more web application servers to support increasing clients, deploying HAproxy and Keepalived for load balancing and High availability. My server usage has the following ...
3
votes
2answers
505 views

Nginx choose upstream depending on args

I need to two different sets of upstreams. But all my requests come from the same URL (same path). The difference is that some request will have a special argument and some won't. Depending on that, I ...
1
vote
1answer
538 views

Nginx Reverse proxy leading to Redirect loop

I have a load balancer (Nginx) and another Apache server which is hosting a wordpress blog (at /blog). I want all my traffic on my load balancer at /blog to go to this Apache server. I have the ...
1
vote
2answers
562 views

HAproxy for postfix

I want to setup HA postfix mail servers with 2 postfix instances. I have two postfix servers and I configured two postfix instances on these servers. Now I want to know how to configure HAproxy ...
2
votes
0answers
68 views

Multiple httpd with JBoss cluster: provide httpd HA

I have a working configuration like this: +-----+ +-----+ +-----+ +-----+ | i1 | | i2 | | i3 | ... | in | JBoss Cluster +--+--+ +--+--+ +--+--+ +--+--+ | ...
0
votes
1answer
62 views

nginx load-balancing doesn't neglect nonworking ip

Iam new to nginx and I have this issue I can't understand. Iam using nginx as a load balancer to three cloud servers.This is nginx configuration : upstream dummyname { server #.#.#.# ...
0
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1answer
35 views

Network Load Balancing - Server 2008 R2

I have 2 virtual Windows Server 2008 R2 instances that I am load balancing with Widnows Network Load Balancing. Since they are on vmware, each machine has 1 nic and uses multicast mode. With ...
1
vote
1answer
313 views

How does HAProxy loadbalancing forward the request?

I'm trying to understand how the loadbalancing in HAProxy works so that I can do some capacity planning. So which one is the right way the HAProxy load balancing works? Scenario A: Request from ...
1
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1answer
2k views

View Current State of Keepalived

Is there a way to view the current state (Master/Backup) in a command line on a server instance? Thanks.
1
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1answer
428 views

MPIO Issue With Server 2012 R2 iSCSI Target

The Setup. We just got 2 HP DL360 g6's Server 2012, running Hyper-V, server1 has an additional P800 controller for an MSA70 sas storage, and is hosting iscsi targets for hyper-v's on server 2. both ...
1
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1answer
4k views

HAproxy 503 Service Unavailable No server is available to handle this request

I'm new to this load balancing scenario and I'm being tasked to figure out how to make this load balancing works. My environment: Centos 6.4 64 Bit Webserver: Lighttpd All running in ESXI virtual ...
0
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0answers
160 views

SSL Integration with apache used for load balancing

We are using apache mod-proxy on top of tomcat to achive load balancing. It is working fine , now we are planning to move to https from httpd . For that my configuration looks as follows ...
2
votes
0answers
47 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 ...
2
votes
1answer
158 views

split web traffic 10% to a new site version and 90% to old?

What if a have a site: test.com and I've developed a new version of that site. And I need to test-drive it first before launching it full-scale. So I want to split web traffic 10% to a new site ...
8
votes
4answers
1k views

How to limit number of sessions?

I need a way to track and limit web sessions to a web app. A "session" is loosely defined as the single user browsing the pages of the said web app. I think it can be translated to: a session is ...
1
vote
3answers
799 views

Modern DNS load-balancing solutions [closed]

I'm learning distributes systems and now I'm researching the DNS load-balancing topic. I have few Linux servers and I want to setup next configuration: one DNS load-balancer that resolves IP ...
0
votes
1answer
485 views

Trying to setup transparent, load balancing, SSL reverse proxy. Is it possible?

I've done a few weeks worth of research on this topic for a project, and unfortunately I'm a simple code monkey, my knowledge of networking and SSL are limited. Pretty much every search I've done so ...
1
vote
2answers
883 views

Failover for server with dual WAN

I have one mail server, one SonicWall firewall, two Internet providers, and an internal DNS server. I have WAN failover set up on the SonicWall so in the event that the primary connection is down ...
0
votes
1answer
188 views

How to implement High Availability easily?

I have a website that is currently hosted in a single DigitalOcean region. DO are great, but occasionally they have routing issues in a region and the website goes down. The stack is very simple - a ...
1
vote
2answers
204 views

Load balancing across uneven links (Cisco\OSPF)

I know that OSPF will load balance across equal cost paths such as: R1 ------------------ R3 | 100mbit | | | | 1gbit| |100mbit | | ...
0
votes
1answer
54 views

How to evaluate if my Apache needs another server and/or load balancer? [duplicate]

I have an Apache web application which is serving ~2k Requests Per Minute. The current infrastructure includes two servers, one acting as Apache + database, and the second one just database. I'm ...
1
vote
1answer
84 views

MongoDB Balancer

So I have 2 sharded clusters with 3 servers each.My mongos is running, my config server is running and ive also added test data to 1 of the 2 shard clusters. I am having trouble getting that data to ...
1
vote
1answer
113 views

Loadbalance UDP traffic with session affinity and way to take servers in & out of rotation [closed]

What is the best way to go about load balancing UDP traffic among a whole bunch of servers, while keeping session affinity based on the users' IP? I need to also be able to take servers in and out of ...
0
votes
3answers
116 views

is this network structure viable?

I would like to know if this network structure it would be viable or not. The main reason it would be to be able to switch manually, the ISP. If one is going down than use the other one. as I know ...
0
votes
1answer
207 views

Nginx upstream automatic weight

We have been using nginx as a reverse-proxy for a php farm, with "manual weight settings" for upstream hosts. The maybe 30 php backend servers are of wildly different power. We cannot change that. We ...
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0answers
44 views

Cisco configuration for public library internet

I'm a C/C++ computer programmer turned IT support guy working for a public library. My day is usually spent helping random grandparents learn how to use email, so my networking knowledge is limited ...
-3
votes
1answer
40 views

Is there a way on the server side to punish evil visitor? [closed]

For example an admin page that should not be visited unless with special cookie or query string token. The point being that anyone who tried and failed would likely be with bad intention. Or when the ...