Perform periodic cleanup of the backup files
Periodically clean up the backup files on your system so that you don't run out of space. Perform this clean up at least once a month.
Clean up older backup files in the delete directory
Completed full backups are saved in the
caspida directory. All existing backups in the
caspida directory are moved to
delete directory. You can safely remove all content in the
delete directory to help minimize the number of files retained on the system, while also preserving recovery capability to the latest checkpoint.
In the following example, it is safe to remove all backup directories
/backup/delete/, while keeping
1000039 folder contains a full backup, while all the other directories starting with zero contain incremental backups.
caspida@node1:~$ ls -t /backup/caspida/ /backup/delete/ /backup/caspida/: 0000045 0000044 0000043 0000042 0000041 0000040 1000039 /backup/delete/: 0000038 0000036 1000034 0000032 0000030 0000028 0000026 0000024 0000022 1000020 0000037 0000035 0000033 0000031 0000029 0000027 0000025 0000023 0000021
Perform additional cleanup of the WAL files
The /backup/wal_archive directory contains the Postgres write-ahead logging (WAL) files used to recover Splunk UBA to a specific point using an incremental backup. Perform periodic clean up of this directory as well to avoid filling up the space on your system.
The following example safely removes all the WAL archive segments that are older than the most recent WAL file segment found in the Splunk UBA full backup 1000039. Perform the following steps as the caspida user on node 2 if you have a 20-node deployment, or on the management node in all other deployments:
- On the Splunk UBA management node, view the archive segments:
caspida@node1:~$ ls /backup/caspida/1000039/postgres/base/pg_wal 0000000100000000000000AC archive_status
- On the Postgres node in your Splunk UBA deployment, verify that there is a backup history file in /backup/wal_archive. The Postgres node is on node 2 in 20-node deployments, and node 1 in all other deployments:
caspida@node1:~$ ls 0000000100000000000000AC*.backup 0000000100000000000000AC.000559A8.backup
- On the Postgres node in your Splunk UBA deployment, use the pg_archivecleanup command to remove all unneeded WAL archive segments older than this point. The Postgres node is on node 2 in 20-node deployments, and node 1 in all other deployments:
/usr/bin/pg_archivecleanup -d /backup/wal_archive/ 0000000100000000000000AC.000559A8.backup
Clean up your Postgres logs
Postgres logs can accumulate over time and take up large amounts of space on your system. Run the following command to clean up all Postgres logs older than 14 days:
find /var/lib/postgresql/10/main/pg_log -type f -mtime +14 -delete
Restore Splunk UBA from incremental backups
Disable automated incremental backups
This documentation applies to the following versions of Splunk® User Behavior Analytics: 5.0.4, 18.104.22.168, 5.0.5, 22.214.171.124