On 8/3/2020 6:17 PM, deloptes wrote:
Leslie Rhorer wrote:
My main server's data is backed up every morning by a
nearly identical backup server using rsync, which in turn is backed up
in its entirety on a multi-volume offline, off-site hard drive set using
DAR every few months. All the boot systems employ two disk RAID 1
mirrors and all the data repositories consist of 5 - 8 spindle RAID 6
arrays.
any thoughts on using deduplication? For example I started using borg some
time ago. It saves a lot of space and makes it possible to have multiple
backups and longer retention. I don't backup music and video - too big and
not changing. The raid is enough for that.
DAR has a number of unique capabilities, including restoring deletions,
which is a very unique feature. I don't know about you, but my video
files represent many hundreds of hours of work, and replacing them en
masse would be a huge and expensive undertaking. The backup server
maintains a daily update of all changes and new files. the server just
isn't all that expensive, comparatively speaking. The DAR backup is
even cheaper, since it is done on old drives removed from the arrays
during upgrades. In one sense, they are free.
DAR allows for not only incremental backups, but also incremental
deletions. I find it extremely useful, and allows for as much space
saving on the live system as one likes. I suggest you check it out.
