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What is physical backup in PostgreSQL?
Physical Backup in PostgreSQL Physical backups are all-or-nothing – you take a full copy of the database cluster and you can restore all of it. The challenge is to make the backup consistent.
What is the difference between pg_dump and Pg_basebackup?
The main differences are: pg_dump typically takes longer and creates a smaller backup. With pg_dump you can back up one database or parts of a database, while pg_basebackup always backs up the whole cluster.
Do I need a physical backup?
It’s always advisable to have a full physical backup done on a weekly or monthly basis. It is best to take them in complete downtime, (meaning there are no database interactions) this is to avoid any inconsistent data showing up during the data recovery.
What do you mean by physical backup?
In its simplest form, physical backup is the movement of all data from one raw device to another; in the context of file system backup the source devices are disks and the destination devices may include disk, CD-Rom, floppy, Zip drives, and of course, tape.
Which is better PostgreSQL logical or physical backups?
Physical backups are great for recovering whole data sets – the speed is limited by hardware: disk and sometimes network (if you copy the data over the network). PostgreSQL, like many other databases, supports both physical and logical backups.
Can a physical backup of a database be run?
Physical backups grab the data as it is – in the end, the data is just a bunch of files stored on some disk. You can copy the data files and have a copy of your database at a given point in time. In real life though, it is not as easy as running a cp command.
How do you restore a PostgreSQL base backup?
Restoring base backup is easy – copy the data into clear PostgreSQL data directory and you are all set – once you start the PostgreSQL process, you will restore your data up to the time of the backup.
When to use PG _ dump for database backup?
DB size greater than 500 Gb : This is where using pg_dump becomes very challenging, and a physical backup is most likely the best path to go on. As suggested in point above, it can help recover individual objects and databases as well by doing some due diligence.