Jeffrey J. Kosowsky wrote:
> Les Mikesell wrote at about 12:15:34 -0500 on Tuesday, September 1, 2009:
>  > Jeffrey J. Kosowsky wrote:
>  > >  > 2) you lose power/crash while expiring
>  > > This would just mean that expiry not completed meaning that some
>  > > expired files not deleted. Same problem occurs if power/crash during
>  > > BackupPC_Nightly. The actual deletion is atomic. Just run expiry again.
>  > 
>  > The actual deletion can't be atomic - you have to one thing in the 
>  > database and one thing in the filesystem.
> 
> No. Expiry only involves deletions to the filesystem. i.e., you delete
> files that no longer are referenced in the database. No changes need
> to be made to the database. If something crashes, just start again.

Will you enforce not running backups while you make this decision? 
Otherwise you have a window between asking the database whether a 
filename should be deleted or not and the time you remove the file. 
Meanwhile a running backup could have just added another entry 
referencing that filename.

-- 
   Les Mikesell
    lesmikesell AT gmail DOT com


------------------------------------------------------------------------------
Let Crystal Reports handle the reporting - Free Crystal Reports 2008 30-Day 
trial. Simplify your report design, integration and deployment - and focus on 
what you do best, core application coding. Discover what's new with 
Crystal Reports now.  http://p.sf.net/sfu/bobj-july
_______________________________________________
BackupPC-users mailing list
BackupPC-users AT lists.sourceforge DOT net
List:    https://lists.sourceforge.net/lists/listinfo/backuppc-users
Wiki:    http://backuppc.wiki.sourceforge.net
Project: http://backuppc.sourceforge.net/