I have taken full backup of postgresql database which consists of 100 databases. The backup format is .sql (eg pg_dumpall.exe -U postgres > D:\Backup\fullbkp.sql) now one of my database got crashed and I want to extract this file to get that database backup only for restoration.
I have searched a lot but couldn't find any way to decompress so that I can get that particular database from full backup file.
Please suggest !!!!
Regards
Sadam
Such a backup is not compressed. Also, it contains a backup of all databases in th cluster, and there is no easy way to extract a single database.
Create a new PostgreSQL cluster with initdb, restore the dump there using psql, then use pg_dump to extract the single database you need.
Related
My last working database back up of an Odoo13CE system was a full one, including the file store. I'm getting timeouts when trying to restore "a copy" via Odoo database manager page. Thought I could just do a partial restore (dump.sql & manifest.json), dump the filestore, recompress and upload and that brought everything down to its knees (Errored w/" no *.dump file found). So logged into server and dropped my failed restore and restarted odoo service and all is back to somewhat normal, with the database I want to replace active.
Is there a way to convert that .sql to a .dump or some other way to get my .sql to be added to my pgdb? I'm fairly green re: psql so if I'm missing something simple, please feel free to shove it down my throat.
TIA
to restore sql back up file to a new database:
psql YOUR_DATABASE_NAME < YOUR_FILENAME
You can read more about restoring/back up Postgres Db here: https://www.postgresql.org/docs/11/backup-dump.html
Restoring the heavy size database(with file store) you have to increase the limit of the server to continue your process.
Add the parameter on your path
--limit-time-cpu=6000 --limit-time-real=12000
Restore the SQL File
psql database_name < your_file.sql
Restore the Dump File
pg_restore -d database_name < your_file.dump
It is know fact that backup and restore is a slow in Postgres
I'd like to deploy database to PostgreSQL server as fast as posible (Like it is possible in MS SQL just file copy and attach).
So If I:
backup and restore schema only.
And than copy database oid folder (data files) in to the appropriate oid ?
Will it work?
of not what I also need to be consider.
No, that won't work.
A database backup and restore can never be faster than copying the files is. So stop the database, copy the complete cluster and start PostgreSQL again. It won't get any faster.
Hello experts I am using postgres 9.5 . When I take a backup from pgadmin it has 950 MB size but when i take the same db backup from pgdump.exe command the backup size is with 7.5 GB. I am confused which backup file will be secured for me that I can use to restore? the restoring process is also slow in postgresql. Please help me.
When you backup something in pgadmin it just calls pg_dump with appropriate options, so both your backups are made by the same pg_dump utility.
I guess you're comparing dumps in two different formats.
Default format for pg_dump is plain, which is basically an enormous uncompressed SQL file.
As for pgadmin, it uses custom format by default, which is a highly compressed binary file.
Also note that pgadmin always displays the actual pg_dump command used to create your dump in the log window, along with its full output.
You should be able to call this command in your command prompt to generate an identical backup file.
You can read more about different output formats and other pg_dump options in PostgreSQL docs.
I'm using pgAdmin to restore PostgreSQL database. To restore the database I need to delete, drop and remake it. How to restore the database without deleting and remaking it?
This cannot be done in pgAdmin or with any database tools. Regular backup files cannot be restored without deleting the data first because they consist of normal COPY statements which will fail if you have rows in the database (primary keys collide etc).
For a simple way to get back to an earlier snapshot in a testing environment take a look at PostgreSQL documentation - 24.2. File System Level Backup:
For backup:
Shut down your database
copy all the files from your data directory
For restore:
Shut down your database
replace your data directory with the backup directory
Note:
the size of the data might be significantly larger than with a regular backup especially if you have a lot of indexes
this is a server wide backup so you can't do this on individual databases
don't attempt to use it on a different version of PostgreSQL
this really deletes the data too - by replacing it with the backup
Also with regular backups you don't have to do a DROP TABLE if you do a data-only restore with pg_restore --data-only for example. You still have to delete the data though.
I am fairly new with PQSQL and am slowly picking things up - I have added a new disk and would like to do two things:
Restore a backup to this new disk - /hda2/pgdata/
Move a database from /hda1/pgdata to /hda2/pgdata/
Q1. Use pg_restore to restore a database. Check out the documentation which is very clear.
One important thing to remember, if you want to move to a later version of PostgreSQL use the later version of pg_dump to create a backup dump file. For example if you want to move from PostgreSQL version 8.3 to version 8.4, then create a backup dump file using pg_dump from version 8.4 and then use pg_restore 8.4 to recreate database in the 8.4 server.
http://www.postgresql.org/docs/8.4/static/app-pgrestore.html
Q2. Backup and restore is a safe way of doing it. Before restoring one can create a tablespace on the new disk and place the database in that space.
CREATE DATABASE mydb TABLESPACE myspace;
http://www.postgresql.org/docs/8.4/interactive/manage-ag-tablespaces.html
Simple command to restore database
Open PSQL Command console
Provide credentials
go to specific database that you need to restore (If the dataabse is not there Create empty database
/i < sql Dump file Path > e.g. \i /usr/local/pgsql/db20121109.sql