NAME
zpool-prefetch – prefetch pool metadata into ARC
SYNOPSIS
zpool prefetch [-t type] pool
DESCRIPTION
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:
- brt
-
Prefetch the BRT (block reference table). This may improve performance for block cloning operations, and frees for earlier cloned blocks.
- ddt
-
Prefetch the DDT (deduplication table). This may improve performance of writes when deduplication is enabled, and frees for earlier deduplicated blocks.