[neurosetta] rsync rebuild

[Dan Berger]

On Thu, 2003-07-10 at 21:45, dann frazier wrote:

> is it reasonable to use rsync to maintain the files on the neuros, followed
> by a positron rebuild?  what are the downsides?
> 

Yup - that's what I've been doing since getting the unit.  The biggest
downside is that for a large number of tracks (I've got on the order of
4k) the positron rebuild step takes on the order of 15-20 minutes.  If
you look in the list archives (there's an URL for them at the bottom of
this message) you'll find the rsync command-line I'm using.  

As a general update - I've found that mounting the neuros with the
"sync" option eliminates the need for the bwlimit flag to rsync, and
seems to make communication more stable in general.

<p>> i'm assuming that a positron sync isn't going to notice things like file
> changes (altering the artist tag, for example).

<p>Correct.  IMO this is a bug - and I've filed it as such in the xiph
bugzilla.

<p>> 
> i realize that my system has to calculate the checksums on the files on
> the neuros, so i am paying the penalty of reading each file in its entirety.
> however, i'm assuming that writes will only take place if necessary.

<p>Not quite true - with the --sizeonly flag to rsync it bases it's
decision (as the flag suggests) on the size of the file - it doesn't do
a checksum)  speeds things up enormously.

> 
> i also realize that i'll lose the pc dbase feature - though i don't really
> see the point of it.  it sounds like the benefit is that you can request
> tracks to be syncd next time - but positron sync just syncs everything anyway,
> right?

<p>As far as I can tell, positron doesn't (yet) support the pc dbase
feature anyway.

> 
> are there characters in filenames that the neuros can't deal with?  i've
> noticed that positron alters characters on the fly (?, for example) - or maybe 
> the vfat layer is doing this transparently.

<p>It's not the vfat layer - positron does some remapping.  There are some
characters (like :, for instance) that are illegal on vfat - a quick
google will find you a list and you can use find to locate files in your
library that contain those characters and rename them as appropriate.

<p>
--

...Dan Berger [dberger at oubliette.org]
   http://www.oubliette.org/~dberger
   Inter arma silent leges
   A982 E6B1 CB2F 7A49  843A 9297 DA73 4371  1F54 8D0C

   "Reality is merely an illusion, albeit a very persistent one."

                             - Albert Einstein

<p>
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