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Query regarding backup maintenance plans

I am in the process of creating backup maintenance plans my databases. In the data flow task, I’ve placed a ‘Maintenance Cleanup Task’ that follows ‘Backup Database Task’ .  In the ‘File age’ section, I only see an option of deleting files older than ‘n’ number of hours, days, weeks, months or years. Is there a way to delete files older than ‘n’ number of files?
Any suggestions are appreciated.
1 Solution
Matt BowlerDB team leadCommented:
No there isn't.

The assumption here is that because backups are being taken on a weekly/daily/hourly... basis then they should be cleaned up as such too. This logic falls over slightly if you take adhoc or out of band backups by manually running the jobs (which is often what you do when you set up the plans).

As a general rule - if you take daily backups and want to keep only 7 files then clean up files older than one week....
Theoretically, there is a way but I'm thinking it is a pretty daunting task to do. It is only possible by using SQL Server Integration Services (SSIS).

This is my theory: If we can get the backup files in one folder location and loop through it, we can do some sorting on it's creation date and determine what is the oldest date (D1). We could then use that data(D1) to delete files (D2) that are older than the date (D1).

To get a start there is this forum discussing about the script for deleting files from SSIS:

Alpesh PatelAssistant ConsultantCommented:
Using Filesystem task, you can count the files with some predefined name and delete based on that.
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