---
name: "zpool-prefetch"
section: "8"
platform: "freebsd"
package: "base"
version: "16.0-CURRENT-20261027-61c70dc16a79"
release: "FreeBSD 16.0-CURRENT (2026-10-27)"
platforms: ["linux", "freebsd"]
url: "https://new.carta.tech/zpool-prefetch"
---

# zpool-prefetch(8)

prefetch pool metadata into ARC

## 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.