chore(postgresql): suggest pgbackrest and percona toolkit for management

knowledge base/percona toolkit.md

@@ -0,0 +1,68 @@
+# Percona toolkit
+
+> TODO
+
+Intro
+
+<!-- Remove this line to uncomment if used
+## Table of contents <!-- omit in toc -->
+
+1. [TL;DR](#tldr)
+1. [Further readings](#further-readings)
+   1. [Sources](#sources)
+
+## TL;DR
+
+<!-- Uncomment if used
+<details>
+  <summary>Setup</summary>
+
+```sh
+```
+
+</details>
+-->
+
+<!-- Uncomment if used
+<details>
+  <summary>Usage</summary>
+
+```sh
+```
+
+</details>
+-->
+
+<!-- Uncomment if used
+<details>
+  <summary>Real world use cases</summary>
+
+```sh
+```
+
+</details>
+-->
+
+## Further readings
+
+- [Website]
+- [Codebase]
+
+### Sources
+
+- [Documentation]
+
+<!--
+  Reference
+  ═╬═Time══
+  -->
+
+<!-- In-article sections -->
+<!-- Knowledge base -->
+<!-- Files -->
+<!-- Upstream -->
+[Codebase]: https://github.com/percona/percona-toolkit
+[Documentation]: https://docs.percona.com/percona-toolkit/
+[Website]: https://www.percona.com/percona-toolkit
+
+<!-- Others -->

knowledge base/postgresql.md

@@ -35,6 +35,11 @@ DB-specific roles).
 
 Extensions in PostgreSQL are managed **per database**.
 
+Prefer using [pg_dumpall] to create **logical** backups.<br/>
+Consider using [pgBackRest] to create **physical** backups.
+
+Consider using the [Percona toolkit] to ease management.
+
 <details>
   <summary>Setup</summary>
 
@@ -173,7 +178,8 @@ SELECT * FROM entries_in_column('vendors','vendor_id');
 
 ## Backup
 
-Refer [pg_dump] and [pg_dumpall].
+Refer [pg_dump] and [pg_dumpall] for **logical** backups.<br/>
+Should one have **physical** access to the DB data directory (`$PGDATA`), consider using [pgBackRest] instead.
 
 PostgreSQL offers the `pg_dump` and `pg_dumpall` native client utilities to dump databases to files.<br/>
 They produce sets of SQL statements that can be executed to reproduce the original databases' object definitions and
@@ -239,7 +245,9 @@ pg_dumpall … -g --no-role-passwords
 
 ## Restore
 
-Refer [psql] and [pg_restore].
+Refer [psql] and [pg_restore] to restore **logical** dumps created via [pg_dump] and [pg_dumpall].<br/>
+Should one have **physical** access to the DB data directory (`$PGDATA`), consider using [pgBackRest] for both processes
+instead.
 
 PostgreSQL offers the `pg_restore` native client utility for restoration of databases from dumps.
 
@@ -372,8 +380,10 @@ See also [yugabyte/yugabyte-db].
 
 <!-- Knowledge base -->
 [mysql]: mysql.md
+[Percona toolkit]: percona%20toolkit.md
 [pg_flo]: pg_flo.md
 [pgadmin]: pgadmin.md
+[pgBackRest]: pgbackrest.md
 [sql]: sql.md
 
 <!-- Upstream -->

knowledge base/template.md

@@ -61,8 +61,8 @@ Intro
 <!-- Knowledge base -->
 <!-- Files -->
 <!-- Upstream -->
-[codebase]: https://github.com/project/
-[documentation]: https://website/docs/
-[website]: https://website/
+[Codebase]: https://github.com/project/
+[Documentation]: https://website/docs/
+[Website]: https://website/
 
 <!-- Others -->