hi,

problem seems to be 'odd week of a month'.
what if the week starts with a tuesday?

why do you try to divide a month into two
groups which -- almost always -- contain a
different number of members?

you could reduce the conflict to once a year
by defining odd/even weeks of the year.


Gi Dot schrieb:

Hi,

I'm having a bit of a problem with my backup schedule. The requirement is
to use 1 tape for 2 days incremental backup and 1 tape for 1 day full
backup. The tapes will be classified into 2 groups, the odd week(1st, 3rd,
5th week of the month), and the even week(2nd and 4th week of the month).
Let's call the odd week as Week 1, and even week as Week 2.

Example:

Week 1.
Tape A: Monday - Tuesday (Incremental)
Tape B: Wednesday - Thursday (Incremental)
Tape C: Friday (Full)
Tape D: Saturday - Sunday (Incremental)

Week 2.
Tape E: Monday - Tuesday (Incremental)
Tape F: Wednesday - Thursday (Incremental)
Tape G: Friday (Full)
Tape H: Saturday - Sunday (Incremental)

My problem is for incremental backup schedule. An excerpt of my schedule:

Schedule {
  Name = "SatSunW1"
  Run = Incremental 1st sat-sun at 13:00
  Run = Incremental 3rd sat-sun at 13:00
  Run = Incremental 5th sat-sun at 13:00
}

Schedule {
  Name = "SatSunW2"
  Run = Incremental 2nd sat-sun at 13:00
  Run = Incremental 4th sat-sun at 13:00
}

This works beautifully for Saturdays AND Sundays that fall on the same
group of either odd or even day in the month. Else, it'll fail.

Example where it works:
WK   Mo Tu We Th Fr Sa Su 18 ...1234 19 567891011 20 12131415161718 21 1920
2122232425 22 262728293031.
Saturday, May3rd and Sunday, May 4th. Both are in the same week(1st week),
in the month of May. This works well.


Example where it doesn't work:
WK   Mo Tu We Th Fr Sa Su 22 ......1 23 2345678 24 9101112131415 25 16171819

202122 26 23242526272829 27 30

Saturday, June 14th and Sunday, June 15th. 14th June is the second Saturday
in the month of June, while 15th June is the 3rd Sunday in the month of
June. Thus, on Saturday, schedule SatSunW2 will be triggered (Tape H in the
drive), but on Sunday, schedule SatSunW1 will be triggered but it won't run
because it is waiting for Tape D. I thought my schedule syntax is right
because I'm using day-range to run a backup job on Saturday and the next
day, Sunday.

What would be the best way for me to solve my schedule problem?

Thanks.

p.s. Sorry for the lengthy explanation, I tried my best to write up my
problem the best way I could.

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