V-VOL page reservation requirement

The V-VOL full allocation is performed in a range less than the depletion threshold size of the pool. If the capacity of V-VOLs is larger than the depletion threshold size, the full allocation operation is rejected.

olh-note.gif If the pool is using pool volumes assigned by parity groups with accelerated compression enabled, the V-VOL full allocation function cannot be defined.

The reserved page capacity for each pool can be calculated by the following formula. In the formula, the value enclosed in ceil ( ) must be rounded up to the nearest whole number.

Reserved capacity for each pool [block] =
ceil (CV capacity of V-VOL [block] / 86016) * 86016 + ceil (CV
capacity of V-VOL [block] /
6442082304) * 4 * 86016 - Used capacity of V-VOL [block]