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What’s New in 2008 R2 – Branch Cache

Do more with less? Ever hear that term? Probably around the same time your budget was cut! Bandwidth between the home office and the branches can be a rather large cost from the actual money spent on the connection to the user downtime when the connection is slow. Having worked in an engineering company that was always sending large CAD drawings back and forth, Branch Cache looks to help.

In a nutshell Branch Cache is very much like a DNS cache. For example, when you do a lookup of thelazyadmin.com via DNS the resulting IP address for the server is stored in your cache until the TTL expires. Branch Cache does the same thing only with data that you have transferred the remote site. There are two types of configurations, peer based and server based.

With peer based caching, User 1 copies Document1 from the file server at the head office to their PC at the remote office. When User2, located at the same remote office attempts to download Document1 from the file server at the head office they are redirected to User1’s computer and will download Document1 from there, saving bandwidth and speeding up the time it takes for the download to complete.

Image courtesy of Microsoft Corporation

A server based Branch Cache configuration works in a similar manner however a server is installed at the remote site and a centralized cache is created there. This is ideal for larger organizations.

Branch Cache works with both SMB and HTTP content and can be configured manually or via group policy.

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