[tahoe-dev] Change the parameters(K-N) when using

[David-Sarah Hopwood]

On 2011-02-28 19:35, Shawn Willden wrote:
> On Mon, Feb 28, 2011 at 11:06 AM, David-Sarah Hopwood <
> david-sarah at jacaranda.org> wrote:
> 
>> Rebalancing, i.e. changing the parameters of existing files and putting
>> shares in the optimal places, is less automatic than we would like it to
>> be. Currently I think the easiest way to do that is to copy a directory
>> tree from the grid to a local filesystem and then copy it back (to a new
>> directory on the grid), then delete the original tree and allow its shares
>> to expire.
> 
> I don't think that will perform rebalancing on immutable files unless you
> also change your convergence secret. Without changing the secret, when you
> do the upload Tahoe will notice that the files already exist in the grid --
> with the old parameters -- and consider that sufficient.

No, because files with the same contents and convergence secret, but
different encoding parameters, do not converge.

(The optimization that 'tahoe cp' does for grid-to-grid copies is
independent of convergence.)

-- 
David-Sarah Hopwood  ⚥  http://davidsarah.livejournal.com

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