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

# [NAME](#NAME)

`zpool-prefetch` — Prefetches pool metadata into ARC

# [SYNOPSIS](#SYNOPSIS)

`zpool` `prefetch` \[`-t` `type`] `pool`

# [DESCRIPTION](#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**](#brt)

Prefetch the BRT (block reference table). This may improve performance for block cloning operations, and frees for earlier cloned blocks.

[**ddt**](#ddt)

Prefetch the DDT (deduplication table). This may improve performance of writes when deduplication is enabled, and frees for earlier deduplicated blocks.

February 14, 2024 OpenZFS

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Document: zpool-prefetch(8) from zfs 2.4.4-r3 (Chainguard OS)
Source: https://github.com/openzfs/zfs