Hi Florian,
About your incremental and differential retention periods:
1) incremental pool: you want to have daily volumes. The is *Volume
Retention = 8 days *oversizing your backup window. I would suggest you to
put it 6 or 7 days, but you have to consider the volume last written time
and count the retention period from this value (we don´t know your backup
run time).
2) differential pool: if you want to have 4 or 5 volumes in this pool (each
one being used at the 2nd, 3rd, 4th and 5th sundays), you have to increase
the volume retention period. 9 days is too short, you will get 1 or 2
volumes in this pool being recycled. So, I would suggest you to put here
the same 34 days as full backups.
Regards,
Ana
On Thu, Jun 5, 2014 at 11:41 AM, Florian Baumgartner <bflori...@gmail.com>
wrote:
> Hey guys,
>
> I'm currently looking into implementing a backup-cycle that takes daily
> incrementals, weekly differentials and monthly fulls (actually VirtualFulls
> in my case). The goal is to be able to restore a file in its daily state
> for a 'sliding window' of roughly one month.
>
> My other goal is to recycle volumes as quickly as possible after they
> expire (to save diskspace and to have a somewhat constant count of volumes).
>
> My main question is if the retention periods I set are sane for the goals
> I have in mind or if there are other catches I'm not aware of.
>
>
> My schedule looks like:
>
> Schedule {
> Name = "WeeklyCycle"
> Run = VirtualFull 1st sun at 20:00
> Run = Differential 2nd-5th sun at 20:00
> Run = Incremental daily at 23:05
> }
>
> Pool {
> Name = {{ hostname }}-Full
> Pool Type = Backup
> Recycle = yes
> AutoPrune = yes
> *Volume Retention = 34 days*
> Maximum Volume Bytes = 50G
> LabelFormat = "{{ hostname }}-Full-"
> Maximum Volume Jobs = 1
> Action On Purge = Truncate
> Storage = {{ storage_node }}
> Next Pool = "{{ hostname }}-Virt"
> }
>
> Pool {
> Name = {{ hostname }}-Incr
> Pool Type = Backup
> Recycle = yes
> AutoPrune = yes
> *Volume Retention = 8 days*
> Maximum Volume Bytes = 50G
> LabelFormat = "{{ hostname }}-Incr-"
> Maximum Volume Jobs = 1
> Action On Purge = Truncate
> }
>
> Pool {
> Name = {{ hostname }}-Diff
> Pool Type = Backup
> Recycle = yes
> AutoPrune = yes
> *Volume Retention = 9 days*
> Maximum Volume Bytes = 50G
> LabelFormat = "{{ hostname }}-Diff-"
> Maximum Volume Jobs = 1
> Action On Purge = Truncate
> }
>
> Thanks for your help!
>
>
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