[Registry-dev] binary xdiff

[Paul Fremantle]

Norman

We discussed the use of a separate store for the content. However, many 
databases (DB2, Oracle) implement this already. Also, there is then a 
significant problem in deployment. For example, if you have a cluster, 
you now have to have a clustered file system as well as database.

I like the idea of doing diffs as a pluggable idea.

Paul

Norman Barker wrote:
> Hi,
> 
> again correct me if I am wrong since I am new to the code, but looking
> at the database schema I see that the complete content of the resource
> is being stored in the artifact table, and in the version table.
> 
> Really I would prefer the content to be stored outside of the DB (and
> this what I am putting into the ORM version) as use case for data is
> large (potentially gigabytes per resource).  For the version table is
> it on the road to support xdelta type diffs (as in Subversion).  I see
> there is a library called JRCS which was in Apache Commons and is now
> LGPL.
> 
> I mention this since it isn't just applicable to the ORM version, and
> does impact the scalability of the registry.
> 
> Norman
> 
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