Given the latency and volatility of WAN links, Network Executive Software Inc.s HyperIP WAN acceleration appliance is an ally for IT departments trying to get the most out of their expensive network pipes.Read more here about WAN replication. In eWEEK Labs tests of a HyperIP implementation of two appliances (one installed at the primary data center and another at a simulated remote office, where data was being replicated), we were thoroughly impressed with the HyperIPs ability to optimize WAN links. However, at $20,000 per appliance and at least two appliances required for an implementation, the HyperIP is definitely not a solution for smaller companies. It caters to a higher-end market, specifically organizations that can afford to install T-3 or greater WAN links. NetExs HyperIP is ideal for accelerating replication traffic over WANs, but for IT managers who have other needs in addition to accelerating TCP/IP traffic, a number of less expensivealbeit not as powerfulsolutions are available. For example, an IT manager who wants to extend file servers over a WAN can implement a WAFS (wide-area file services) solution that would not only minimize WAN traffic but also provide a remote cache to minimize the number of requests sent over a WAN. Both DiskSites Inc. and Tacit Networks Inc. provide WAFS appliances. In the case of DiskSites FileCache, a base implementation for one data center site ($14,000) and a remote site ($7,000) can be acquired for $21,000. Tacits IShared Server Appliance is comparably priced. Next Page: Protocols in traffic.
For most companies moving large amounts of data over a WAN, the problem isnt the size of the pipe but rather the speed at which data can be sent over it. WAN optimization products such as the HyperIP, which shipped last month, allow applications to send out packets as quickly as possible while using proprietary technology to ensure that common problems such as dropped or out-of-order packets do not crimp the speed of WAN links.