mailing.lists.wam mailing.lists.wam wrote:

> Hi,
> 
> I'm having strange issues with BackupPC 3.1.0 on ubuntu 10.04.
> 
> 1) I would like to configure backup schedule for a specified host this
> way, but couldn't find suitable config:
> 
> Backup every hour and keep 72 backups ( 3 days) ==> IncrPeriod 0.03 ?
> IncrKeepCNT 72 ? IncrKeepCntMin 72 ? IncrLevels ?
> Keep 32 Full backups (a bit more than a month) => FullPeriod => 0.9 ?
> FullKeepCntMin => 32 ?
> Keep 12 Months backups (1 year)

IncrPeriod=0.04                         (because one day = 24hours, 1/24=0,0416 
~0,04)
IncrKeepCnt=72
IncrLevels = [1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, ... , 24]
FullPeriod=0,97                         (every day a full backup)
FullKeepCnt=[32, 0, 0, 0, 0, 12]        (32 backups at 1 * $Conf{FullPeriod} = 
1day
                                        (0 backups at 2 * $Conf{FullPeriod} = 
2day
                                        (0 backups at 4 * $Conf{FullPeriod} = 
4day
                                        (0 backups at 8 * $Conf{FullPeriod} = 
8day
                                        (0 backups at 16 * $Conf{FullPeriod} = 
16day
                                        (12 backups at 32 * $Conf{FullPeriod} = 
32day

> 
> In this case does the deduplication take care of hard disk drive space ?
Deduplication will also work in the above case and will save hard disk
space.
> 
> 2) For the other hosts i would like to setup schedule this way:
> Incremental each day
> Full on Sunday afternoon
> Keep 2 Fulls backups and 6 incremental for each full backup,
> I setup the schedule like this :
> FullPeriod = 6.9
> FullKeepCNT = 2
> IncrPeriod = 0.9
> IncrKeepCNT = 6
> IncrKeepCntMin = 1
> IncrLevels = 1,2,3,4,5,6
> Blackout Periods hourbegin=8, hourEnd=22, weekDays=1,2,3,4,5
> 
> Is this setup correct ? BackupPC would'nt make some backup sometimes, many
> hosts has "Nothing to do" state and Incremental Age of backup > 1.

I didn't know if BackupPC supports so frequent backups.

If you will save 6 incremental for each full you need IncrKeepCnt = 12.
Nobody can guarantee that the full backup runs at sunday.
e.g.:
Incrementals run fine from Monday until Saturday.
Client is down on Sunday.
The full backup will run at the following Monday. The next 6 incrementals
will run from Tuesday until Sunday and the next full will run at monday
again.

> Thanks for all your advices.

br
Matthias
-- 
Don't Panic


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