Summary:
Item new: Add a scheduling syntax that is friendly for weekly rotations
Item new: Add a scheduling syntax that is friendly for weekly rotations
Date: 28 November 2005
Origin: Gregory Brauer (greg at wildbrain dot com)
Status:
What: Currently, Bacula only understands how to deal with weeks of the
month or weeks of the year in schedules. This makes it impossible
to do a true weekly rotation of tapes. There will always be a
discontinuity that will require disruptive manual intervention at
least monthly or yearly because week boundaries never align with
month or year boundaries.
A solution would be to add a new syntax that defines (at least)
a start timestamp, and repetition period.
Why: Rotated backups done at weekly intervals are useful, and Bacula
cannot currently do them without extensive hacking.
Notes: Here is an example syntax showing a 3-week rotation where full
Backups would be performed every week on Saturday, and an
incremental would be performed every week on Tuesday. Each
set of tapes could be removed from the loader for the following
two cycles before coming back and being reused on the third
week. Since the execution times are determined by intervals
from a given point in time, there will never be any issues with
having to adjust to any sort of arbitrary time boundary. In
the example provided, I even define the starting schedule
as crossing both a year and a month boundary, but the run times
would be based on the "Repeat" value and would therefore happen
weekly as desired.
Schedule {
Name = "Week 1 Rotation"
#Saturday. Would run Dec 30, Jan 20, Feb 10, etc.
Run {
Options {
Type = Full
Start = 2006-12-30 01:00
Repeat = 3w
}
}
#Tuesday. Would run Jan 2, Jan 23, Feb 13, etc.
Run {
Options {
Type = Incremental
Start = 2007-01-02 01:00
Repeat = 3w
}
}
}
Schedule {
Name = "Week 2 Rotation"
#Saturday. Would run Jan 6, Jan 27, Feb 17, etc.
Run {
Options {
Type = Full
Start = 2007-01-06 01:00
Repeat = 3w
}
}
#Tuesday. Would run Jan 9, Jan 30, Feb 20, etc.
Run {
Options {
Type = Incremental
Start = 2007-01-09 01:00
Repeat = 3w
}
}
}
Schedule {
Name = "Week 3 Rotation"
#Saturday. Would run Jan 13, Feb 3, Feb 24, etc.
Run {
Options {
Type = Full
Start = 2007-01-13 01:00
Repeat = 3w
}
}
#Tuesday. Would run Jan 16, Feb 6, Feb 27, etc.
Run {
Options {
Type = Incremental
Start = 2007-01-16 01:00
Repeat = 3w
}
}
}
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