IT is important thing in business today. Many company have IT consolidated or centralized, meaning that application or data center is centralized at head quarter or centralized data center. This scenario include file server consolidation, email consolidation, and application consolidation. File server consolidation reduces complexity, increases efficiency, and reduces risk. Email consolidation simplifies management and upgrades matter.
In other side, reliable connection is important in order to run the applications smoothly, and this can impact the business too. This can be achieve with more bandwidth, but sometimes condition is more complex than bandwidth matter. For example, one application has different nature than other. For example, some application is delay sensitive, while another application hungry of bandwidth. One application is critical and important for business, and another is not.
WAN Optimization helps to overcome this. Several techniques are used to achieve this. WAN Optimization combine these techniques :
1. Data reduction, combine techniques to reduce data across WAN. These techniques usually is used :
- Data compression
- Caching
2. Latency mitigation, improve network delay to increase performance application. Example of these are TCP and CIFS acceleration, application specific acceleration, like SQL, and HTTP acceleration.
3. Bandwidth management and Qos, critical and sensitive application still have bandwidth even in congested link.
Several vendor have WAN Optimization product with variation techniques, basically they use techniques describe above. Example of WAN Optimization vendors in the market are BlueCoat, Riverbed, Expand, Juniper, and Cisco.
When you plan to use WAN Optimization, the criteria that you need to consider are performance, price, and licensing scheme to save your investation, and better TCO. In WAN Optimization, tipically vendor use complex licensing scheme, include bandiwidth license, application license, and amount of class in QoS. Foer example, when you choose some product, you need to know their bandwidth license, so that when you upgrade the bandwidth, no need to buy new box. Other consideration example, if you have file server, or often transfer amount of file acrros WAN, or send reporting file from branch to head quarter, you consider the box that have CIFS caching feature. QoS is the one thing that you need, because many application, need more bandwidth, with QoS you can prioritizing application.
You may collect information about application need, bandwidth, future development, before decide to buy your WAN Optimization box.
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