Ubuntu zsys

Cconfigure garbage collection

<source lang=yaml> cat > /etc/zsys.conf <<EOF history:

 # Keep at least n history entry per unit of time if enough of them are present
 # The order condition the bucket start and end dates (from most recent to oldest)

 # We also keep all previous state saves for the previous day.
 # gcstartafter: 1 (GC start after a whole day).
 gcstartafter: 1 

 # Minimum number of recent states to keep.
 keeplast: 7

 #    - name:             Abitrary name of the bucket
 #      buckets:          Number of buckets over the interval
 #      bucketlength:     Length of each bucket in days
 #      samplesperbucket: Number of datasets to keep in each bucket
 gcrules:
   - name: PreviousDay
     buckets: 1
     bucketlength: 1
     samplesperbucket: 3
     #
     # For the previous Day (after on full day of retention of all
     # snapshots due to gcstartafter: 1), the rule PreviousDay
     # defines one bucket (buckets: 1) of size 1 day (bucketlength: 1),
     # where we keep 3 states. So basically, we keep 3 states on the
     # previous full day.
     #
   - name: PreviousWeek
     buckets: 5
     bucketlength: 1
     samplesperbucket: 1
     #
     # For the 5 days before (buckets: 5 of size 1 day (bucketlength: 1)),
     # we keep one state (samplesperbucket: 1).
     # It means thus that we keep one state per day for each of those 5 days.
     #
   - name: PreviousMonth
     buckets: 4
     bucketlength: 7
     samplesperbucket: 1
     #
     # We divide the previous month, in 4 buckets (buckets: 4) of
     # 7 days each (bucketlength: 7) and keep one state for each
     # (samplesperbucket: 1).
     # In English, this means that we try to keep one state save
     # per week over the previous month.
     #

general:

 # Minimal free space required before taking a snapshot
 minfreepoolspace: 20
 # Daemon timeout in seconds
 timeout: 60

EOF systemctl restart zsysd.service zsysctl service gc update-grub </syntaxhighlight>