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Enterprise Software

Images: NSI Software’s DoubleTake Part 2

By Bill Detwiler April 12, 2006, 5:02 AM PDT on Twitter billdetwiler

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NSI Software's DoubleTake
NSI Software's DoubleTake
Images: NSI Software’s DoubleTake Part 2

© CNET Networks - Submitted by Steven Warren

Double-Take Failover Control Center

rn

In his The Hot Button blog, TechRepublic columnist Steven Warren outlined how you can provide high availability with Microsoft SQL Server and NSI Software’s DoubleTake. This gallery’s 12 screenshots show you how to configure DoubleTake for SQL Server failover.

© CNET Networks - Submitted by Steven Warren
Images: NSI Software’s DoubleTake Part 2

Adding a Target machine

Images: NSI Software’s DoubleTake Part 2

Adding a Monitor

Images: NSI Software’s DoubleTake Part 2

On this window, you can select your failover to be Automatic or Manual. Secondly, you can also decide what items you want to failover. Once you have chosen your options, click Scripts.

Images: NSI Software’s DoubleTake Part 2

This is where you will attach your postover and preback batch file scripts. In the event of a failover, the scripts will shut down the specific services and start them on the Target server. When a failback occurs, it will do the opposite. Without attaching these scripts, this functionality will not work.

Images: NSI Software’s DoubleTake Part 2

The SQL Servers that DoubleTake is currently monitoring

Images: NSI Software’s DoubleTake Part 2

When a failover occurs on the Source machine, your target machine will begin to process the requests for both machine names and IP addresses as shown in here.

Images: NSI Software’s DoubleTake Part 2

From the Failover Control Center, shown here, you can test the failover process.

Images: NSI Software’s DoubleTake Part 2

Performing a manual failover to test the setup.

Images: NSI Software’s DoubleTake Part 2

The manual failover in progress

Images: NSI Software’s DoubleTake Part 2

Once the failover is complete both IP addresses will respond to ping commands and requests from the network until you fix the downed server.

Images: NSI Software’s DoubleTake Part 2

The downed server

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By Bill Detwiler
Bill Detwiler is the Editor for Technical Content and Ecosystem at Celonis. He is the former Editor in Chief of TechRepublic and previous host of TechRepublic's Dynamic Developer podcast and Cracking Open, CNET and TechRepublic's popular online show.
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