---
name: "xapian-chert-update"
section: "1"
platform: "linux"
package: "xapian-tools"
version: "1.2.19-1+deb8u1"
release: "Debian 8 (Jessie)"
platforms: ["linux"]
url: "https://new.carta.tech/xapian-chert-update"
---

# xapian-chert-update(1)

Update a chert database to the new format keys

## NAME

chert-update - Update a chert database to the new format keys

## SYNOPSIS

**chert-update** \[*OPTIONS*\] *SOURCE\_DATABASE DESTINATION\_DATABASE*

## DESCRIPTION

chert-update - Update a chert database to the new format keys

## OPTIONS

- **-b**

  Set the blocksize in bytes (e.g. 4096) or K (e.g. 4K) (must be between 2K and 64K and a power of 2, default 8K)

- **--help**

  display this help and exit

- **--version**

  output version information and exit