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Jul 28th, 2019
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  1. #!/bin/bash
  2. # Modifica i valori di queste 3 variabili
  3. zpool="zpool"    # nome del pool ZFS
  4. dataset="dataset"      # dataset di cui fare lo snapshot
  5. dummy="dummy"     # file il cui contenuto cambia ad ogni sync
  6.  
  7. if [ -e /tmp/$dummy.md5 ]
  8. then
  9.     newmd5=`md5 -q /mnt/$zpool/$dataset/$dummy`
  10.     oldmd5=`cat /tmp/$dummy.md5`
  11.     if [ $newmd5 != $oldmd5 ]
  12.     then
  13.         zfs snapshot $zpool/$dataset@`date +\%Y.\%m.\%d_\%H.\%M`                     echo "Snapshot del dataset $dataset:"
  14.         ls -la /mnt/$zpool/$dataset/.zfs/snapshot | tail -n +4
  15.         md5 -q /mnt/$zpool/$dataset/$dummy > /tmp/$dummy.md5
  16.     fi
  17. else
  18.     md5 -q /mnt/$zpool/$dataset/$dummy > /tmp/$dummy.md5
  19. fi
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