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In this blog post, I am going to share with you all the commands required for taking database back-up & restoring database from those back-up files. I am working with Postgres database and I am using Navicat IDE. Now taking back-up & restoring database is possible with Navicat but for some reason in my case I was experiencing large delays in database restore. Thus I decided to switch back to the proven approach of taking database back-up & restore via command line. Lets get started.
Note: The commands listed below in the post are available in official documentation page. This post is more like a book keeping exercise for me so that I can easily look-up the command & setup information in future.
The very first thing we need is the psql shell command. I am having a mac book and the Postgres database is running inside a Ubuntu VM. I need a way to connect to the Postgres instance hosted inside VM from my OSX operating system. So if you are like me and you don’t have Postgres installed locally then go ahead and download postgres.app toolset from here. Run the app after installing it. It will open up a console pointing to the bin directory of the app containing various Unix executable files along with the psql binary. The path would look like this : /Applications/Postgres.app/Contents/Versions/9.5/bin
Next thing we need to do is to add this path to our machines system path. Run the following command :
Now you will be able to invoke the psql shell command from anywhere in your machine.
Taking database dump : pg_dump
The command for taking database dump is :
-p 5432 -U postgres -F c -b -v -f " / "
Like me if your Postgres database is hosted in other machine or inside VM then provide the ip address of the machine where host_name is required. The command assumes that Postgres is listening on post 5432 and “postgres” is the database user name. You can read about the additional command line arguments here : http://www.postgresql.org/docs/9.5/static/app-pgdump.html
Restoring database from dump file : pg_restore
The command for restoring database from dump file(or even tar file) is :
-p 5432 -U postgres -d -v " ”
The argument names are self explanatory. Ensure that you have first created the database before restoring it. You can more details about the pg_restore command here : http://www.postgresql.org/docs/9.5/static/app-pgrestore.html