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Choosing the Right Data Replication Technology for Your Business Application

The explosive growth in storage and increased data availability demands have driven IT managers to investigate new, cost-effective technologies for disaster recovery and business continuance. Data replication is an essential part of these initiatives, in addition to being a way to reduce backup costs, consolidate resources and migrate data. With the help of Serval you can pick the right technology to meet your particular business need with products such as Doubletake or Neverfail.

Double-Take is certified for Windows 2003 Standard, Enterprise and Datacenter Editions!

And here is another question for you: Will your data survive even if your building doesn't? Double- Take is your downtime-prevention (and career) insurance policy. It's the World's Market leader in Disaster Recovery. You get real-time data protection to reduce data loss and downtime, and enhances the performance of your existing backup apps. Double-Take monitors file changes as they occur on one (or many) of your source servers, replicating them in real-time to a target server over your existing network links.

Robust, industry-strength downtime prevention.

There you are in the late afternoon and all your users are humming along... with email via Exchange and SQL database transactions rolling in... orders piling up... CAD files being built, dozens of projects progressing on schedule and then...

Your File Server Crashes!

All the creativity, productivity, and profits of a full day's business just vaporized before your eyes. User morale drops down below zero. The phone starts to get an ugly ring to it. Now, its like travelling back in time as your backup was made last night (14 hours ago), and you start your trip to tape hell...

The Show Must Go On

In many corporate Windows NT/2000 environments, the loss of even an hour's data may cost many (tens of) thousands of dollars. Downtime is similarly expensive resulting in lost productivity and lost business.
With traditional backup alone, you run the risk of losing up to a full day's data in the event of a system failure. Even the best tape backup systems require hours to restore a large server, and downtime can extend to days if the restore does not go smoothly. For many businesses, this amount of lost data and downtime is no longer acceptable.
At the other extreme, there are specialized, distributed applications that can continue to run even in the event of an NT/2000 Server failure. Unfortunately, these systems tend to be limited to a single application and are often expensive and complex.
Double-Take monitors file changes as they occur on one or many source servers, replicating them in real-time to a server over existing network links. In the event of a server failure, Double-Take's target server has backup copies of all your critical files immediately available for your users. The target server can even assume the identity of the failed server virtually eliminating data loss and downtime.

Enhances Existing Backup Systems

Double-Take can be used without changing your current tape backup strategy. Double-Take makes it easy to backup open files, since the replicated copy is always available for backup. In addition, the option of centralizing your tape backup operations on the target server can reduce cost and simplify management of your backup systems.

Disaster Recovery

No data protection strategy is complete without off-site protection from disasters. Because of its patented communication technology, Double-Take is uniquely suited to replicating data over WAN links.

How Double-Take Works

A small software module is installed on each source and target server. An easy-to-use client application lets you define which data will be replicated and where the copies will be stored. The initial mirroring operation can be performed while the source servers are active. After this simple configuration and initial mirroring are completed, operations are automatic and transparent.
The failover module resides on the target server, and continually monitors the source servers. In the event of a server failure the target server can assume the names and IP adresses of the failed servers (in addition to its original name), and invoke scripts to restart applications.

Improved Data Protection

Double-Take protects data in real-time, reducing your exposure to data loss from a full day's data to seconds or less.

Disaster Recovery Protection

Up-to-the-minute offsite protection is an important part of a your business continuity strategy. Double-Take works efficiently over slower WAN links.

Reduced Downtime

Failover is fast and automatic. Your exposure to downtime is reduced or eliminated.

Enhanced Data Compression

Three levels of compression introduced in Version 4.4 allow more data to be replicated and increase performance and scalability.

Cross-Platform Data Interchange

Data can be mirrored and replicated between your Double-Take machines running on different OS platforms (NT/W2K).

Enhances Backup Performance

By giving your existing third-party backup system access to open files, Double-Take improves backup reliability. In addition, the option of centralizing backup operations on the target server simplifies management, improves performance, and reduces cost of ownership.

Select the amount of bandwidth you want to use

Double-Take for NT allows you to select the amount of bandwidth you would like to dedicate to replication. If you have a 128K link you can limit replication to a maximum of 64K reserving the remainder for standard network traffic.

Click here to see Doubletake white papers PDF’s

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