On 03/28/2018 11:51 AM, David Brownlee via cctalk wrote:
A step up from rsync can be dirvish - it uses rsync, but before each backup it creates a hardlink tree of the previous backup, then rsyncs over it. The net effect is you only pay the block cost of one copy of unchanged files, plus an inode per copy. Can be very handy
I've used something like that with great success. - This is commonly known as "Single Instance Store".
The only down side is that there is a single copy of the file, and if something happens to it, the entire backup set is impacted.
This is easy to get around by periodically creating a new set backup set that future days are hard linked against. (Play with the numbers to match your preference.)
-- Grant. . . . unix || die
