[tahoe-dev] 100-year cryptography

[Francois Deppierraz]

Hi,

Zooko Wilcox-O'Hearn wrote:

> Could someone who is running Tahoe-LAFS on ARM please upload and  
> download a file and look at the "Recent Uploads and Downloads" page  
> and post the timings to the mailing list?

I've uploaded two files on the VolunteerGrid from a Tahoe node running
on an Intel SS4000-E NAS box with Debian squeeze which currently serves
as an ARM buildbot. This box has an Intel XScale IOP80219 ARM processor
running at 600 MHz.

Here are the timing information of the upload of two different files.

# Timings:

    * File Size: 6279530 bytes
    * Total: 117 seconds (53.5kBps)
          o Storage Index: 1.17s (5.38MBps)
          o [Contacting Helper]:
                + [Helper Already-In-Grid Check]:
          o [Upload Ciphertext To Helper]: ()
          o Peer Selection: 8.56s
          o Encode And Push: 107 seconds (78.0kBps)
                + Cumulative Encoding: 51 seconds (121.9kBps)
                + Cumulative Pushing: 29 seconds (216.4kBps)
                + Send Hashes And Close: 4.37s
          o [Helper Total]:

# Timings:

    * File Size: 9824328 bytes
    * Total: 3 minutes (46.5kBps)
          o Storage Index: 1.97s (4.98MBps)
          o [Contacting Helper]:
                + [Helper Already-In-Grid Check]:
          o [Upload Ciphertext To Helper]: ()
          o Peer Selection: 5.44s
          o Encode And Push: 3 minutes (61.8kBps)
                + Cumulative Encoding: 89 seconds (109.3kBps)
                + Cumulative Pushing: 69 seconds (142.0kBps)
                + Send Hashes And Close: 6.63s
          o [Helper Total]:


If you wish to play any further with it, it's accessible at
http://edouard.ctrlaltdel.ch:9797/

François