[tahoe-dev] Introducing pubgrid, the new high-throughput public storage grid

Zooko O'Whielacronx zookog at gmail.com
Thu Jun 10 22:43:27 PDT 2010


So how well is the new volunteer-based public grid doing?

Let's see, it shows 6 servers connected at the moment. Which is not
bad, actually, if they have good reliability and performance!

I wish the introducer welcome page would tell me how much capacity
they each have available (#648).

Well, I guess I'll upload some files to it and see how it works!

…

Well, it works!

The download speed through my local gateway running on my own laptop
looked like this:

# Timings:

    * File Size: 768229 bytes
    * Total: 5.13s (149.8kBps)
          o Peer Selection: 118ms
          o UEB Fetch: 322ms
          o Hashtree Fetch: 110ms
          o Segment Fetch: 4.57s (167.9kBps)
                + Cumulative Fetching: 4.54s (169.1kBps)
                + Cumulative Decoding: 315us (2433.68MBps)
                + Cumulative Decrypting: 23ms (33.11MBps)
          o Paused by client: 10ms
    * Per-Server Segment Fetch Response Times:
          o [lv3fqmev]: 1.42s, 822ms, 594ms, 581ms, 558ms, 552ms
          o [sp26qyqc]: 899ms, 796ms, 567ms, 504ms, 436ms, 345ms
          o [tqgl77ej]: 526ms, 349ms, 455ms, 267ms, 283ms, 264ms

The download speed of the same file through the public web gateway
looked like this:

# Timings:

    * File Size: 768229 bytes
    * Total: 1.67s (458.9kBps)
          o Peer Selection: 76ms
          o UEB Fetch: 8.2ms
          o Hashtree Fetch: 4.2ms
          o Segment Fetch: 1.58s (484.9kBps)
                + Cumulative Fetching: 1.27s (607.2kBps)
                + Cumulative Decoding: 1.5ms (499.56MBps)
                + Cumulative Decrypting: 19ms (39.98MBps)
          o Paused by client: 298ms
    * Per-Server Segment Fetch Response Times:
          o [sp26qyqc]: 8.8ms, 13ms, 7.7ms, 6.9ms, 6.7ms, 5.4ms,
4.8ms, 4.2ms, 7.7ms, 7.3ms, 4.8ms, 4.2ms
          o [tqgl77ej]: 414ms, 209ms, 210ms, 141ms, 142ms, 139ms

Here is the file in question. It is an old copy of my blog. I'm
looking for a more recent copy of my blog…   :-)

http://pubgrid.tahoe-lafs.org/uri/URI:DIR2-RO:ixqhc4kdbjxc7o65xjnveoewym:5x6lwoxghrd5rxhwunzavft2qygfkt27oj3fbxlq4c6p45z5uneq/blog.html

Regards,

Zooko

http://tahoe-lafs.org/trac/tahoe-lafs/ticket/648# show server
capacities on introducer welcome page


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