Which statement best describes Thin provisioning as a storage method?

Which statement best describes Thin provisioning as a storage method?

• A. It allocates storage on demand
• B. It allocates all storage upfront
• C. It allocates space only on demand but with immediate zeroing
• D. It uses fixed blocks

Answer: (A)

Thin provisioning presents a large virtual storage capacity to systems while only consuming physical storage as data is actually written. This lets you over-allocate storage and grow into the physical space over time, which improves utilization and reduces upfront hardware costs. The key idea is that storage is allocated on demand, not reserved all at once, so a host can appear to have more space than is currently backed by physical disks. If activity accelerates and fills the physical space, you’d need to add capacity or risk performance issues, which is the trade-off to manage. That on-demand allocation behavior is what makes this description the best fit. The other options describe upfront allocation (not thin provisioning), immediate zeroing on allocation (not universal to the concept and adds a different behavior), or fixed-block storage (a normal storage layout, not the provisioning approach).

Thin provisioning presents a large virtual storage capacity to systems while only consuming physical storage as data is actually written. This lets you over-allocate storage and grow into the physical space over time, which improves utilization and reduces upfront hardware costs. The key idea is that storage is allocated on demand, not reserved all at once, so a host can appear to have more space than is currently backed by physical disks. If activity accelerates and fills the physical space, you’d need to add capacity or risk performance issues, which is the trade-off to manage.

That on-demand allocation behavior is what makes this description the best fit. The other options describe upfront allocation (not thin provisioning), immediate zeroing on allocation (not universal to the concept and adds a different behavior), or fixed-block storage (a normal storage layout, not the provisioning approach).