We run a database server running PostgreSQL with database size of around 130GB growing at a rate of 500MB per day. We use HP Data Protector software to take backups of the database.
The issue here is that our database is on a GFS mounted partition and the current backup software license does not facilitate taking backups from GFS, NFS mounted partitions.
So, as a workaround, we planned to copy the database to a local partition using pg_dump
utility and take backups from the local partition using data protector software. But I am not sure whether we can take incremental backups using pg_dump
. Full backup everyday is not possible for us.
Please suggest steps for taking incremental backup of a PostgreSQL database.
Best Answer
The best method to incremental backup Postgres is to use periodic hot physical backups and continuous WAL archiving.
http://www.postgresql.org/docs/9.1/static/continuous-archiving.html
The periodic physical backup can be done with rsync using the --copy-dest= option to take advantage of any previous copy reusing unchanged files.
This is a very effective way of backing up Postgres and can also be used to do Point In Time Recovery (PITR) in case of disaster.