[Plone-developers] Fwd: ZODB Blob Support

[Sidnei da S. <si...@en...>]

Re-sending

---------- Forwarded message ----------
From: Sidnei da Silva <si...@en...>
Date: Dec 18, 2006 3:36 PM
Subject: Re: [Plone-developers] ZODB Blob Support
To: Justizin <jus...@si...>
Cc: plone-developers <plo...@li...>


On 12/17/06, Justizin <jus...@si...> wrote:
> I am really impressed with what I hear about blobstorage, but I am
> concerned that it is more complex to map interaction with other
> applications via the filesystem because it stores via UIDs vs.
> ExternalStorage, which uses the actual filename, but does not support
> renaming, or at least products using it don't seem to.

There are certainly tradeoffs. You can get:

  - Real filenames, with/without renaming support, with/without
'versioning' support, no ZEO support at all.

Or you can get:

  - Gibberish filenames, with renaming support, with 'versioning'
support, with ZEO support

The new blob implementation in ZODB trunk does give you the latter. I
believe that a blob implementation that does not work with ZEO is
bound to fail. That's why I like this one and I'm willing to support
it.

There could be a layer on top of this, external to Zope, that given a
OID would give you the 'current file'. Then you don't need a real
filename.

My understanding is that 'real filename' is overrated. Since you only
need this for serving through say, Apache, you could have a simple
script that would map oid -> filename -> oid. If, OTOH, you need to
write to the file behind Zope then you're asking for trouble.

--
Sidnei da Silva
Enfold Systems                http://enfoldsystems.com
Fax +1 832 201 8856     Office +1 713 942 2377 Ext 214


-- 
Sidnei da Silva
Enfold Systems                http://enfoldsystems.com
Fax +1 832 201 8856     Office +1 713 942 2377 Ext 214