Book Image

Mastering PostgreSQL 10

Book Image

Mastering PostgreSQL 10

Overview of this book

PostgreSQL is an open source database used for handling large datasets (big data) and as a JSON document database. This book highlights the newly introduced features in PostgreSQL 10, and shows you how you can build better PostgreSQL applications, and administer your PostgreSQL database more efficiently. We begin by explaining advanced database design concepts in PostgreSQL 10, along with indexing and query optimization. You will also see how to work with event triggers and perform concurrent transactions and table partitioning, along with exploring SQL and server tuning. We will walk you through implementing advanced administrative tasks such as server maintenance and monitoring, replication, recovery, high availability, and much more. You will understand common and not-so-common troubleshooting problems and how you can overcome them. By the end of this book, you will have an expert-level command of advanced database functionalities and will be able to implement advanced administrative tasks with PostgreSQL 10.
Table of Contents (15 chapters)

Replaying backups

Having a backup is pointless unless you have tried to actually replay it. Fortunately, it is easy to do. If you have created a plain text backup, you can simply take the SQL file and execute it:

psql your_db < your_file.sql
A plain text backup is simply a text file containing everything. You can always simply replay a text file. 

If you have decided on a custom format or directory format, you can use pg_restore to replay the backup. pg_restore allows you to do all kinds of fancy things such as replaying just part of a database and so on. In most cases, however, you will simply replay the entire database. In my example, I will create an empty database and just replay a custom format dump:

[hs@linuxpc backup]$ createdb new_db
[hs@linuxpc backup]$ pg_restore -d new_db -j 4 /tmp/dump.fc  

Note that pg_restore will add data to an existing database. If your database...