system time change for incremental backup

Help
nickwen
2006-03-08
2013-05-20
  • nickwen
    nickwen
    2006-03-08

    if system time changes what will dump do?

    so it failed on system time change? because incremental backup depends on last   full dump time!

     
    • Stelian Pop
      Stelian Pop
      2006-03-08

      Incrementals are indeed based on the system time (they save all inodes which have changed since the last full - or lower incremental - dump).

      If the system time change in the future this should be rather harmless. But if the system time change in the past, crossing the time of a previous dump, the incremental dump could save more inodes than needed.

      Besides, I wonder if there aren't some checks in the code (in either dump or restore) which would prevent such a case to work...