On 11/29/2010 5:00 AM, Paulo Martinez wrote:
> Hi Dan,
>
> Am 29.11.2010 um 02:40 schrieb Dan Langille:
>> Tonight I was thinking how I want to structure my backups.  I'm
>> presently backing up to disk and I'm about to running Copy Jobs from
>> there to tape.
>>
>> Then I started thinking: if I keep quarterly FULL backups (a full
>> backup
>> done every three months), I would have more space to keep backups
>> longer.  Let's assume those quarterly backups are kept for 10 years,
>> which will require a new Pool with 'Volume Retention = 10 years'.
>>
>> But how best to achieve these quarterly backups?  My initial thoughts
>> were along the lines of the classic schedule:
>>
>>    Run = Level=Full 1st sun at 8:15
>>    Run = Differential 2nd-5th sun at 8:15
>>    Run = Incremental mon-sat at 8:15
>>
>> but adjusted slightly for every three months:
>>
>>    Run = Level=Full jan apr jul oct 1st sun at 8:15
>>
>> This this quickly becomes complicated.
>
>
> I am also thinking about the same setup (Full after a half year for
> ten years).
>
> I am just curious why "Run = Level=Full jan jun 1st sun at 8:15"
> would become complicated?

I'm thinking about the INCR and DIFF jobs that follow it.  They need to 
be based upon something (i.e. the Full).  My initial concern was they 
all needed to be in the same Pool.  That is incorrect.  Restores can 
collect backups from different Pools.

Where it does get complicated is the other schedule, for regular Full 
backups:

    Run = Level=Full Feb Mar May Jun Aug Sep Nov Dec 1st sun at 8:15

OK, it's not that complicated.

> Furthermore i thought about putting one Full backup at one Volume(set).
> I am not sure if "Maximum Volume Jobs = 1" would accomplishing this.
> Because the data could grow and needing a second tape. Or how to delete
> the appendable flag of the volume? I read something about that but
> can't remember where :-)

If a Job requires more than one Volume, "Maximum Volume Jobs = 1" would 
not hinder that.

-- 
Dan Langille - http://langille.org/

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