1. Back up Current Data

Stop the original Ambari Server.
```
ambari-server stop
```
Create a directory to hold the database backups.
```
cd /tmp
mkdir dbdumps
cd dbdumps/
```

Create the database backups.

pg_dump -U $AMBARI-SERVER USERNAME ambari > ambari.sql Password: $AMBARI-SERVER PASSWORD
pg_dump -U $MAPRED USERNAME ambarirca > ambarirca.sql Password: $MAPRED PASSWORD

Where usernames and passwords reflect your particular installation. Defaults are ambari-server/bigdata and mapred/mapred.

Index