Access "Thin provisioning: Blessing or curse?"
This article is part of the Vol. 5 No. 3 May 2006 issue of How to distance your data from disaster
STORAGE MANAGERS in the market for a new SAN array may be tempted by a new feature of some arrays--thin provisioning--but not all users who have tried it are sold on the concept. Thin provisioning, sometimes called oversubscription, is a way to quickly get capacity to an application. It's a feature of some virtualized storage arrays where the storage controller allocates storage to the application, but releases it only when the capacity is required. When utilization of that storage approaches a predetermined threshold, the array automatically expands the volume without involving the storage administrator. Thin provisioning helps storage administrators break the old habit of overprovisioning storage--a common practice used to protect against having to continually grow volumes and LUNs. Vendors with thin provisioning include 3PAR, which pioneered the concept, as well as Cloverleaf Communications, DataCore Software, LeftHand Networks, Network Appliance and Pillar Data Systems. Some users love thin provisioning. Warren Habib, CTO at Fotolog, an online photo blog... Access >>>
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