zpool-prefetch.8

ZPOOL-PREFETCH(8) System Manager's Manual ZPOOL-PREFETCH(8)

zpool-prefetch — Prefetches pool metadata into ARC

zpool prefetch [-t type] pool

Massively prefetch metadata of a specific type for the given pool into the ARC to reduce latency of some operations later. If no type is specified, all types are prefetched.

The following types are supported:

Prefetch the BRT (block reference table). This may improve performance for block cloning operations, and frees for earlier cloned blocks.
Prefetch the DDT (deduplication table). This may improve performance of writes when deduplication is enabled, and frees for earlier deduplicated blocks.
February 14, 2024 Debian