Philippe Clérié wrote:
I'm curious to know how fast obnam is for other users.
My home network is mostly Gigabit Ethernet. Measuring with iperf, the best
speed I get is around 600Mbps, maybe 700Mbps depending on the computers
involved.
With obnam, speeds are anywhere below 50Mbps. Even with no other traffic on
the network.
obnam is heavily influenced by latency between the 2 computers.
So using obnam across a transatlantic link will be slow, even if the
link is fast.
obnam is also not super-fast even when run locally, backing up to a
local drive. I have not tried to get to the bottom of that; some of it
could be due to gpg overhead, and some to innefficient use of the filesystem.
Some quick benchmarks suggest obnam might only be saturating around 20%
of the total available disk (or network) bandwidth, under optimal
conditions (ie, backup to a SSD).