Dead End Street to Deduplication
The ongoing hype about data deduplication for online storage inspired me to have a look at it from a slightly different angle. The promises given by some vendors to save 50% capacity or more especially made my internal alarm bells ring about some aspects of modern storage architecture.
DataCore projects in the last 5 to 10 years show that capacity constraints are seldom the major problem, but why is that?
This appears to be because of our thin-provisioning technology, which allows the user to present much more virtual capacity than he/she really has available in physical disks. The possibility to oversubscribe the storage reduces the average storage overhead from about 10% to 15% (which in traditional thick-provisioned SANs easily consumes up to 60% of the total capacity). Therefore, thin provisioning delivers 45% to 50% of net capacity savings on average.
Interestingly enough, deduplication promises to deliver similar results, but the major difference between thin provisioning and deduplication is the way capacity saving is achieved.
Read the entire article here, Dead End Street to Deduplication
via the fine folks at DataCore Software