Restoring a tarball installation from backup

his topic describes how to manually restore a previous DataStax Enterprise (DSE) version from a tarball installation.

When restoring a previous version, it’s important that you don’t change the installation structure. If you must change the structure of the restored installation, you must make any necessary path and configuration adjustments.

To restore a previous DSE, do the following:

Stop the DSE service if it is running.

/<installation_location>/bin/dse cassandra-stop

Remove the existing DSE installation directory.
```
rm -rf /<installation_location>/
```
Completely purge any existing data or configuration directories and files.
```
sudo rm -rf /var/lib/cassandra
sudo rm -rf /var/log/cassandra
sudo rm -rf /var/log/spark ## If using Spark
sudo rm -rf /var/lib/spark ## If using Spark
sudo rm -rf /var/lib/dsefs ## If using DSEFS
```
The directories above are the default. If you have customized your installation directories, make appropriate adjustments to the paths.
Reinstall the old version as described in the documentation for that release of DSE.

Do not start DSE after installation.

Extract your backup to the root of your drive.

sudo tar -xvf /backup_path/backup_archive_name.tar -C /

Move the snapshot files up two levels to their keyspace directories. Replace snapshot_name with the name of the snapshot created during the backup.
```
sudo find /var/lib/cassandra/data -mindepth 2 -path '*/snapshots/snapshot_name/*' -type f \
-exec bash -c 'dir={} && cd ${dir%/*} && mv {} ../..' \;
```
The directory shown in the previous command is the default. If you customized your installation directories, then make appropriate adjustments to the path.

If you don’t know the snapshot name, you can find it by browsing the tar archive.
Restore permissions.
```
sudo chown dse_username:dse_group /var/lib/cassandra
```
The directory shown in the previous command is the default. If you customized your installation directories, then make appropriate adjustments to the path.

Start DSE.

/<installation_location>/bin/dse cassandra

If you are using DSE Search, rebuild the index (5.1).

Restoring a tarball installation from backup

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