Bernhard Ott wrote:
Hi,
first of all: I'm simply loving backuppc, using it for 2 years now,
works flawlessly!
Sorry that this subject is not entirely backuppc-related:
What are your recommended chunk-sizes for burning tar-files (archive
host) to DVD-RW?
I played around with this a bit last month on my archive, and settled
for splitting on 200 meg chunks (fitting roughly 20 files + par data per
disk) and creating 5% par data. Unfortunately since the archive host is
tied to the same timeout variable as normal backups (I _believe_, anyway
- is that in the per-host configuration or is it server-wide?), I did
all this outside of BackupPC. I convinced myself that it would work by
removing a single tar split from the working directory and having PAR
recreate it successfully. IIRC I had BackupPC create monolithic
archives, then went to town on them with split and par2create.
Now, if I were more paranoid, I'd probably start spreading the TARs
and PARs across as many discs as my backup set demanded so that a
single-disc point failure wouldn't lose _too_ much data, but that's
still playing the odds. I'd like to mess around with dar, which
supposedly copes better with a lost split archive file, but I haven't
gotten around to it yet.
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