Replication Choices A wide variety of data replication technologies are available to suit the needs and budgets of many organizations.
Array-based solutions are rock-solid and well-trusted, but they are also expensive and proprietary. IT managers who are trying to protect transaction-sensitive applications and who already have investments in compatible storage systems should investigate these solutions. Examples: EMCs SRDF, Hitachi Data Systems TrueCopy
Host-based solutions are fairly inexpensive, but they use up valuable memory and CPU resources on servers. Host-based solutions are best used for asynchronous replication of data and would be good for protecting file servers and some database and e-mail servers. Example: NSI Softwares Double-Take
Network-based solutions, among the newest classes of replication technology, typically use intelligent appliances to replicate data over WANs. These systems will be a good choice for organizations that want to replicate from expensive storage systems at their primary site to less expensive storage at backup sites. Example: Kashyas KBX4000Discuss this in the eWEEK forum.
Senior Analyst Henry Baltazar can be reached at email@example.com.