Re: [BackupPC-users] Incremental Strategy

[Christopher D. <cm...@uc...>]

Dan Pitts suggested:

FullPeriod=27.9
incrperiod=.9
# this should add up to 27 days worth
incrlevels=[2,2,2,2,2,2,1,2,2,2,2,2,2,1,2,2,2,2,2,2,1,2,2,2,2,2,2]
incrkeepcount= however many you want

And I agree but I think the incrlevels repeat so you might need only the first 6 or so 2's and a 1.   Les is suggesting something like a Full every week and just keep four fulls and week's worth of incrementals.  That also seems like a good idea if the "full" is essentially an incremental if you include the pooling.  I'll give the latter a go.

Thanks for the tips,

Chris 



Les Mikesell wrote:
> Christopher Derr wrote:
>> I've been reading the docs on incrementals and it isn't 100% clear to 
>> me how to use the directives for something like:
>>
>> One full a month
>> A level 1 incremental at the end of each week
>> level 2 incrementals between
>>
>> Goal: To have backups going back one month with a fairly minimal use 
>> of storage space.
>>
>> I'd appreciate a kick in the right direction for a solution similar 
>> to this using the FullPeriod, IncrPeriod, IncrKeepcnt, and IncrLevels.
>
> Before you start down this path, be sure you understand that storing 
> multiple fulls doesn't take up a lot more space than incrementals 
> since all identical copies of a file are pooled.  Also, with the tar 
> and smb methods you can miss files in incrementals if they are copied 
> in ways that preserve old timestamps.
>