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Subject: Re: GSoC 2011 unionfs Project Idea

Re: GSoC 2011 unionfs Project Idea

From: Jonathan Gordon <>
Date: Thu, 10 Mar 2011 11:31:35 +1100

On 9 March 2011 19:52, sideral <> wrote:
> I don't know what the person proposing unionfs had in mind.  To me it's
> not clear whether he'd want multiple volumes exposed as one at the
> storage layer (exposing only one block device over USB), at the file
> system layer (r/w or r/o?), or in the file browser.  But I for one would
> be quite happy with a read-only union file browser.
> sideral

The past discussions have mostly been around 2 different ideas to
solve the issue with music on the microSD card.
1) make the database handle per-device databases which get un/merged
when cards are inserted/removed
2) actually mount the removable card differently (much more like
unionfs on linux) so you could have /Music which shows all
files/folders under /<internal>/Music and /<external>/Music (with
read/write priorities which 'make sense')

It shouldn't be surprising that the people wanting the first option
use the DB and the people wanting the 2nd don't. So both would be the
best outcome. I think 2 is relativly simple and is not a GSoC project
by itself.

A possible way to do 1 would be storing the cards serial number with
the filename and making the browser hide tracks which are not on the
inserted card or internal. Then you have the fun of needing a way to
really remove tracks which havnt been seen in "ages", and deciding if
two tracks on diferent cards are indeed the same, etc.

Received on 2011-03-10

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