[tahoe-lafs-trac-stream] [Tahoe-LAFS] #84: allow introducer to provide default encoding parameters (k-of-n)

[Tahoe-LAFS]

#84: allow introducer to provide default encoding parameters (k-of-n)
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     Reporter:  warner       |      Owner:  somebody
         Type:  enhancement  |     Status:  closed
     Priority:  major        |  Milestone:  0.5.0
    Component:  code         |    Version:  0.4.0
   Resolution:  fixed        |   Keywords:  encoding
Launchpad Bug:               |
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Old description:

> For small+centrally-managed grids, the admin of the introducer should be
> able to recommend the values for k and n (as in k-of-n encoding). The
> value of 'n' should be set to be about the maximum number of peers in the
> network, since there's no point in producing more shares than there are
> peers (unless you expect more peers to arrive in the future, and we need
> to write more code to take advantage of new peers without reencoding
> anyways). The value of 'k' should be set to achieve whatever reliability-
> vs-expansion goals you have in mind.
>
> For small networks, we're thinking that 3-of-10 seems like a good idea.

New description:

 For small+centrally-managed grids, the admin of the introducer should be
 able to recommend the values for k and n (as in k-of-n encoding). The
 value of 'n' should be set to be about the maximum number of peers in the
 network, since there's no point in producing more shares than there are
 peers (unless you expect more peers to arrive in the future, and we need
 to write more code to take advantage of new peers without reencoding
 anyways). The value of 'k' should be set to achieve whatever reliability-
 vs-expansion goals you have in mind.

 For small networks, we're thinking that 3-of-10 seems like a good idea.

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Comment (by warner):

 The vestigal support got removed in the 1.11.0 release, by [56a9f5ad].

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Ticket URL: <https://tahoe-lafs.org/trac/tahoe-lafs/ticket/84#comment:4>
Tahoe-LAFS <https://Tahoe-LAFS.org>
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