2 Web Server Farm w/ Network Load Balancing; Need Opinions

Posted on 2008-11-11
Last Modified: 2012-05-05
I have two servers that will host a web application. The web application is accessible through an internet browser on port 80. Its a simple app but will have many users at any given time. The only thing I need to accomplish is network load balancing and failover.

The servers are identical and will access their data from a common source. So far I configured Window's "Network Load Balancing" with a common IP and DNS name for the two servers. From a remote browser I can access the web app using the NLB IP address. If I shut one of the servers off I can still hit the one that's up with the NLB address. My questions are: Do I need to do anything else or is Window's "Network Load Balancing" enough? How can I check how many and which users are connected to each server?
Question by:t3ngu
    LVL 13

    Accepted Solution

    For basic web load balancing, NLB is fine and dandy.  There are many hardware load balancing options available but you need to balance their cost and complexity against your requirments.

    The only potential gotcha with NLB is locking of shared data.  Have you confirmed that two connections to seperate servers will not conflict when reading/writing the same file data.  In some circumstances, you many need to maintain two copies of the data with a replication script to prevent locking issues.

    The log files in c$\WINDOWS\system32\LogFiles\W3SVC1 on each server will show you which clients are connecting.



    LVL 1

    Author Comment

    Thanks for the info. If I decide to use two copies of the data; what's the most efficient way to replicate the data?
    Thanks Again..
    LVL 13

    Expert Comment

    When it comes to replicating data there are a number of options but I am a big advocate of robocopy.

    If you've not used it before it's an excellent free utility and full syntax can be found by typing robocopy.exe /? from a command prompt.

    The command you will use will look something like this:

    robocopy.exe source target /MIR /COPYALL /ZB /R:0 /W:0



    Write Comment

    Please enter a first name

    Please enter a last name

    We will never share this with anyone.

    Featured Post

    Top 6 Sources for Identifying Threat Actor TTPs

    Understanding your enemy is essential. These six sources will help you identify the most popular threat actor tactics, techniques, and procedures (TTPs).

    INTRODUCTION The purpose of this document is to demonstrate the Installation and configuration, of the HP EVA 4400 SAN Storage. The name , IP and the WWN ID’s used here are not the real ones. ABOUT THE STORAGE For most of you reading this, you …
    One of the typical problems I have experienced is when you have to move a web server from one hosting site to another. You normally prepare all on the new host, transfer the site, change DNS and cross your fingers hoping all will be ok on new server…
    Internet Business Fax to Email Made Easy - With eFax Corporate (, you'll receive a dedicated online fax number, which is used the same way as a typical analog fax number. You'll receive secure faxes in your email, fr…
    Polish reports in Access so they look terrific. Take yourself to another level. Equations, Back Color, Alternate Back Color. Write easy VBA Code. Tighten space to use less pages. Launch report from a menu, considering criteria only when it is filled…

    760 members asked questions and received personalized solutions in the past 7 days.

    Join the community of 500,000 technology professionals and ask your questions.

    Join & Ask a Question

    Need Help in Real-Time?

    Connect with top rated Experts

    12 Experts available now in Live!

    Get 1:1 Help Now