Restore time / speed reasonableness check

[Joao Nelas <joao.nelas@cultofbits.com>]

Hi,

I’m testing tarsnap and I’d like to check that our restore times / download speeds are plausible :)
I’ve made a backup with the sql dumps of two databases and I got the following stats:

                                       Total size  Compressed size
All archives                           5467278315        651413813
  (unique data)                        5467278315        651413813
This archive                           5467278315        651413813
New data                               5467278315        651413813

So, 5Gb that compressed down to 620Mb.

Attempting to restore it to another computer (Linode VM in London) I got:

$ time tarsnap -x --keyfile ../tarsnap.key -f backup-2015-11-10_10-14-27

real    153m58.643s
user    2m7.313s
sys     0m24.897s

$ du -sh .
5,1G   

So, almost 2,5 hours which, if my calculations are correct, gives something like 564Kbits/s
if we take the compressed size as a proxy to the transmitted size.

This seems rather low to me and I would like to check if there’s something that I should be doing.

Thanks,
João