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<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd"><html xmlns="http://www.w3.org/1999/xhtml"><head><meta http-equiv="Content-Type" content="text/html; charset=UTF-8" /><title>76.1. Backup Manifest Top-level Object</title><link rel="stylesheet" type="text/css" href="stylesheet.css" /><link rev="made" href="pgsql-docs@lists.postgresql.org" /><meta name="generator" content="DocBook XSL Stylesheets Vsnapshot" /><link rel="prev" href="backup-manifest-format.html" title="Chapter 76. Backup Manifest Format" /><link rel="next" href="backup-manifest-files.html" title="76.2. Backup Manifest File Object" /></head><body id="docContent" class="container-fluid col-10"><div class="navheader"><table width="100%" summary="Navigation header"><tr><th colspan="5" align="center">76.1. Backup Manifest Top-level Object</th></tr><tr><td width="10%" align="left"><a accesskey="p" href="backup-manifest-format.html" title="Chapter 76. Backup Manifest Format">Prev</a> </td><td width="10%" align="left"><a accesskey="u" href="backup-manifest-format.html" title="Chapter 76. Backup Manifest Format">Up</a></td><th width="60%" align="center">Chapter 76. Backup Manifest Format</th><td width="10%" align="right"><a accesskey="h" href="index.html" title="PostgreSQL 15.4 Documentation">Home</a></td><td width="10%" align="right"> <a accesskey="n" href="backup-manifest-files.html" title="76.2. Backup Manifest File Object">Next</a></td></tr></table><hr /></div><div class="sect1" id="BACKUP-MANIFEST-TOPLEVEL"><div class="titlepage"><div><div><h2 class="title" style="clear: both">76.1. Backup Manifest Top-level Object</h2></div></div></div><p>
The backup manifest JSON document contains the following keys.
</p><div class="variablelist"><dl class="variablelist"><dt><span class="term"><code class="literal">PostgreSQL-Backup-Manifest-Version</code></span></dt><dd><p>
The associated value is always the integer 1.
</p></dd><dt><span class="term"><code class="literal">Files</code></span></dt><dd><p>
The associated value is always a list of objects, each describing one
file that is present in the backup. No entries are present in this
list for the WAL files that are needed in order to use the backup,
or for the backup manifest itself. The structure of each object in the
list is described in <a class="xref" href="backup-manifest-files.html" title="76.2. Backup Manifest File Object">Section 76.2</a>.
</p></dd><dt><span class="term"><code class="literal">WAL-Ranges</code></span></dt><dd><p>
The associated value is always a list of objects, each describing a
range of WAL records that must be readable from a particular timeline
in order to make use of the backup. The structure of these objects is
further described in <a class="xref" href="backup-manifest-wal-ranges.html" title="76.3. Backup Manifest WAL Range Object">Section 76.3</a>.
</p></dd><dt><span class="term"><code class="literal">Manifest-Checksum</code></span></dt><dd><p>
This key is always present on the last line of the backup manifest file.
The associated value is a SHA256 checksum of all the preceding lines.
We use a fixed checksum method here to make it possible for clients
to do incremental parsing of the manifest. While a SHA256 checksum
is significantly more expensive than a CRC32C checksum, the manifest
should normally be small enough that the extra computation won't matter
very much.
</p></dd></dl></div></div><div class="navfooter"><hr /><table width="100%" summary="Navigation footer"><tr><td width="40%" align="left"><a accesskey="p" href="backup-manifest-format.html" title="Chapter 76. Backup Manifest Format">Prev</a> </td><td width="20%" align="center"><a accesskey="u" href="backup-manifest-format.html" title="Chapter 76. Backup Manifest Format">Up</a></td><td width="40%" align="right"> <a accesskey="n" href="backup-manifest-files.html" title="76.2. Backup Manifest File Object">Next</a></td></tr><tr><td width="40%" align="left" valign="top">Chapter 76. Backup Manifest Format </td><td width="20%" align="center"><a accesskey="h" href="index.html" title="PostgreSQL 15.4 Documentation">Home</a></td><td width="40%" align="right" valign="top"> 76.2. Backup Manifest File Object</td></tr></table></div></body></html>
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