January 2007
Intermediate to advanced
760 pages
25h 14m
English
Content preview from Backup & Recovery
Become an O’Reilly member and get unlimited access to this title plus top books and audiobooks from O’Reilly and nearly 200 top publishers, thousands of courses curated by job role, 150+ live events each month,
O’Reilly covers everything we've got, with content to help us build a world-class technology community, upgrade the capabilities and competencies of our teams, and improve overall team performance as well as their engagement.I wanted to learn C and C++, but it didn't click for me until I picked up an O'Reilly book. When I went on the O’Reilly platform, I was astonished to find all the books there, plus live events and sandboxes so you could play around with the technology.I’ve been on the O’Reilly platform for more than eight years. I use a couple of learning platforms, but I'm on O'Reilly more than anybody else. When you're there, you start learning. I'm never disappointed.I'm always learning. So when I got on to O'Reilly, I was like a kid in a candy store. There are playlists. There are answers. There's on-demand training. It's worth its weight in gold, in terms of what it allows me to do.
Chapter 21. PostgreSQL
As discussed in Chapter 15, any relational database that is to be trusted with production data should be ACID-compliant. PostgreSQL is the most popular open-source relational database that is always ACID-complaint. You can achieve ACID compliance in a MySQL database if you use the InnoDB or the NDB storage engines. (As of this writing, the MySQL team is developing other ACID-compliant storage engines.) With PostgreSQL, all data is stored in an ACID-compliant fashion. PostgreSQL also offers sophisticated features such as point-in-time recovery, tablespaces, checkpoints, hot backups, and write ahead logging for fault tolerance. These are all very good things from a data-protection and data-integrity standpoint.
PostgreSQL Architecture
From a power-user standpoint, PostgreSQL is like any other database. The following terms mean essentially the same in PostgreSQL as they do in any other relational database:
| Database |
| Table |
| Index |
| Row |
| Attribute |
| Extent |
| Partition |
| Transaction |
Clusters
A PostgreSQL cluster is analogous to an instance in other RDBMSs, and each cluster works with one or more databases. It is not typical to have more than one cluster per database server, but it is possible and is done in some cases. For example, consider a shared hosting environment with different sets of users that should not be given administrative access to each others’ data. Since user information is global within a cluster, you would need to create multiple instances to have multiple groups ...
Become an O’Reilly member and get unlimited access to this title plus top books and audiobooks from O’Reilly and nearly 200 top publishers, thousands of courses curated by job role, 150+ live events each month,
and much more.
Read now
Unlock full access
More than 5,000 organizations count on O’Reilly
O’Reilly covers everything we've got, with content to help us build a world-class technology community, upgrade the capabilities and competencies of our teams, and improve overall team performance as well as their engagement.Julian F.
I wanted to learn C and C++, but it didn't click for me until I picked up an O'Reilly book. When I went on the O’Reilly platform, I was astonished to find all the books there, plus live events and sandboxes so you could play around with the technology.Addison B.
I’ve been on the O’Reilly platform for more than eight years. I use a couple of learning platforms, but I'm on O'Reilly more than anybody else. When you're there, you start learning. I'm never disappointed.Amir M.
I'm always learning. So when I got on to O'Reilly, I was like a kid in a candy store. There are playlists. There are answers. There's on-demand training. It's worth its weight in gold, in terms of what it allows me to do.