How to Restore a Database pg_dump - Help

Tsirkin Evgeny

2004-11-23 15:02:23 UTC

Post by Flavio Borup
I´m not DBA. I´m a infrastruture professional, please someone help me
In my company we have a PGSQL Linux Red Hat 9 Database
The relevant portions of my DB Backup Script follows
I can send too, the whole script with other parts of the code
The backup is beeing made with the ´bva´ parameters
How can i restore?
I have to do a su - postgresql?

no .you already have the instractions in the script you posted:

# | a) If the backup is plain text:
# |
# | Firstly gunzip your backup file (if it was gzipped).
# |
# | gunzip backup_file.gz
# | psql -U postgres database < backup_file
# |
# | b) If the backup is not plain text:
# |
# | Firstly gunzip your backup file (if it was gzipped).
# |
# | gunzip backup_file
# | pg_restore -d database -F {c|t} backup_file
# |
# | Note: {c|t} is the format the database was backed up as.
# |
# | pg_restore -d database -F t backup_file_tar

bva options means - you have the plain text format.

Post by Flavio Borup
i have to drop and recrate something?

you should delete all the data from the tables
(not drop tables) .
running the
psql -U postgres database < backup_file
will add the data to database.
if you still have data in tables i suggest running backup befor you try
this(if the data is meaningful).
However please note all this is not so simple: if you have
keys/triggers/sequences the data have to be loaded
in some order ,so this maybe tricky .if you don't know what you are
doing ,better don't do it.
And follow the link in the script!
http://www.postgresql.org/idocs/index.php?app-pgrestore.html
Evgeny.

Post by Flavio Borup
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#!/bin/sh
#
# +-- Restoration can be performed by using psql or pg_restore.
# |
# |
# | Firstly gunzip your backup file (if it was gzipped).
# |
# | gunzip backup_file.gz
# | psql -U postgres database < backup_file
# |
# |
# | Firstly gunzip your backup file (if it was gzipped).
# |
# | gunzip backup_file
# | pg_restore -d database -F {c|t} backup_file
# |
# | Note: {c|t} is the format the database was backed up as.
# |
# | pg_restore -d database -F t backup_file_tar
# |
#
# http://www.postgresql.org/idocs/index.php?app-pgrestore.html
#
# Run backup, vacuum and analyze
run_bva() {
for i in $databases; do
start_time=`date '+%s'`
timeinfo=`date '+%T %x'`
"$location_binaries/vacuumdb" -z -h $postgresql_hostname -U $postgresql_username $i >/dev/null 2>&1
"$location_binaries/pg_dump" $backup_args -h $postgresql_hostname $i > "$location_backup_dir/`date +%B-%Y`/$date_info/$current_time-postgresql_database-$i-backup"
if [ "$backup_gzip" = "yes" ]; then
gzip "$location_backup_dir/`date +%B-%Y`/$date_info/$current_time-postgresql_database-$i-backup"
chmod $permissions_backup_file "$location_backup_dir/`date +%B-%Y`/$date_info/$current_time-postgresql_database-$i-backup.gz"
else
chmod $permissions_backup_file "$location_backup_dir/`date +%B-%Y`/$date_info/$current_time-postgresql_database-$i-backup"
fi
finish_time=`date '+%s'`
duration=`expr $finish_time - $start_time`
echo "Backup, Vacuum and Analyze complete (duration $duration seconds) at $timeinfo for schedule $current_time on database: $i, format: $backup_type" >> $location_logfile
done
exit 1
}
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