I am using duply to backup files/directories to S3. I want a full backup once a month, and an incremental every day in between. I also want to keep all backups for up to a month, but I don't understand how purging works. In the conf file, I have set the following variables:
MAX_AGE=1M MAX_FULL_BACKUPS=4 MAX_FULLS_WITH_INCRS=4 MAX_FULLBKP_AGE=1W DUPL_PARAMS="$DUPL_PARAMS --full-if-older-than $MAX_FULLBKP_AGE "
I have set the following command in my crontab:
0 0 * * * duply my-profile backup
and everything seems to be working. The first backup was a full one. The second and third where incrementals.
What I expect this to do is:
Take a full backup once a week, incrementals in between and keep only 4 full backups, none of them older than a month.
- Is my assumption correct or is there something more I should do?
- Do I have to do anything else for purging to work?