AFS Backup Policy

The stated goal of the backup policy is to keep backups for the expected shelf life of the tapes being used. That life is currently ten years. The scheme is as follows:

• Keep all full backups for three years (years -3 to the present)
• Keep archive copies of full backups every six months (January and July) for the years previous to three years for the past ten years (years -10 through -4)

  For example, as of November 2004, we (theoretically) have the following:

  	2001 January
  	2001 July 
  	2001 November
  	2001 December
  
  	2002 January
  	2002 Febrary
  	2002 March
  	2002 April
  	2002 May
  	2002 June
  	2002 July
  	2002 August
  	2002 September
  	2002 October
  	2002 November
  	2002 December
  
  	2003 January
  	2003 Febrary
  	2003 March
  	2003 April
  	2003 May
  	2003 June
  	2003 July
  	2003 August
  	2003 September
  	2003 October
  	2003 November
  	2003 December
  
  	2004 January
  	2004 Febrary
  	2004 March
  	2004 April
  	2004 May
  	2004 June
  	2004 July
  	2004 August
  	2004 September
  	2004 October
  	2004 November