On 12/13/2019 3:03 AM, Andrea Venturoli wrote:
Hello.
At a site I manage, we've got Bacula backing up a bunch of clients to
a NAS SD daily.
Occasionally (once a week ATM) we want to move the backed up data to
an external HD for more resilience.
I'm asking for suggestion on how to better do this.
Currently, I'm using vchanger and Copy jobs to achieve this, selecting
the most recent Full+Diff for every client (through an SQL query):
this works, but uses more space than needed (of course all modified
files being on both the Full and the Diff volume), so often the disk
gets full.
I thought about VirtualFull to consolidate the data, but AFAICT
there's no way to tell Bacula to then ignore the new volume (like copy
does), so in case of a restore I would have to plug in the disk while
I have all the needed data on the NAS.
I do something similar, only monthly copies, rather than weekly. I do
not use differential backups at all, but rather quarterly fulls, monthly
virtual fulls in between quarterlies, and daily incrementals. A monthly
Copy job makes copies of the virtual fulls for storage in an on-site
fire safe, and another quarterly Copy job makes quarterly copies for
off-site storage.
The amount of storage needed depends on the granularity needed. I
recycle the monthly virtual fulls after 1 year. The quarterly fulls and
copies are kept for 3 years, with the year-end quarterly and its copy
kept for 10 years. This gives a tiered granularity, daily for the past
30 days, monthly for the past year, quarterly for 2 - 3 years, and
yearly for 3 - 10 years.
If you are going to have weekly restore points, then you should
definitely look into using base jobs. Weekly restore points will
necessarily use a lot of media, but base jobs would dramatically reduce
the backup size.
If you are not concerned with archival and only need restoration to
current state, then weekly virtual fulls along with weekly copies might
be best, recycling them as often as needed based on available media.
I could try a restore to the disk, but I would need some on the fly
compression system and I don't think this could be easily automated.
Any other idea (apart from buying bigger disks)?
bye & Thanks
av.
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