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41 lines
1.4 KiB
Markdown
41 lines
1.4 KiB
Markdown
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---
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title: Define different retention schedules
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layout: default
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parent: How Tos
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nav_order: 9
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---
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# Define different retention schedules
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If you want to manage backup retention on different schedules, the most straight forward approach is to define a dedicated configuration for retention rule using a different prefix in the `BACKUP_FILENAME` parameter and then run them on different cron schedules.
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For example, if you wanted to keep daily backups for 7 days, weekly backups for a month, and retain monthly backups forever, you could create three configuration files and mount them into `/etc/dockervolumebackup/conf.d`:
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```ini
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# 01daily.conf
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BACKUP_FILENAME="daily-backup-%Y-%m-%dT%H-%M-%S.tar.gz"
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# run every day at 2am
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BACKUP_CRON_EXPRESSION="0 2 * * *"
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BACKUP_PRUNING_PREFIX="daily-backup-"
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BACKUP_RETENTION_DAYS="7"
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```
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```ini
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# 02weekly.conf
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BACKUP_FILENAME="weekly-backup-%Y-%m-%dT%H-%M-%S.tar.gz"
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# run every monday at 3am
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BACKUP_CRON_EXPRESSION="0 3 * * 1"
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BACKUP_PRUNING_PREFIX="weekly-backup-"
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BACKUP_RETENTION_DAYS="31"
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```
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```ini
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# 03monthly.conf
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BACKUP_FILENAME="monthly-backup-%Y-%m-%dT%H-%M-%S.tar.gz"
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# run every 1st of a month at 4am
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BACKUP_CRON_EXPRESSION="0 4 1 * *"
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```
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{: .note }
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While it's possible to define colliding cron schedules for each of these configurations, you might need to adjust the value for `LOCK_TIMEOUT` in case your backups are large and might take longer than an hour.
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