Re: Making metadata storage SQL-driven

["John (J5) Palmieri" <johnp redhat com>]

On Thu, 2005-09-01 at 12:34 +0100, Jamie McCracken wrote:
> Luis Villa wrote:
> > On 9/1/05, Jamie McCracken <jamiemcc blueyonder co uk> wrote:
> > 
> >>Rodrigo Moya wrote:
> >>
> >>>On Thu, 2005-09-01 at 12:10 +0100, Jamie McCracken wrote:
> >>>
> >>>
> >>>>Christian Neumair wrote:
> >>>>
> >>>>
> >>>>>I really wonder why we rely on files for our metadata. It has issues [1]
> >>>>>where a synchronous fopen and read or write operation would really take
> >>>>>too long, requiring us to schedule reads/writes. Without doing any
> >>>>>performance measures, I think this could significantly speed up our
> >>>>>metadata code for big directories. I think we should do the same as
> >>>>>beagle, and rely on a tiny SQL server, doing all our metadata operations
> >>>>>synchronously. I'm not a big fan of EAs, since they seem to be some
> >>>>>different flavors and inconsistencies among various implementations.
> >>>>>
> >>>>>[1] http://makeashorterlink.com/?Y364247BB
> >>>>>
> >>>>>
> >>>>
> >>>>you are correct and thats why Im building such a system for Gconf/common
> >>>>config system, general metadata server, schematic storage (like winFS),
> >>>>indexing and anything else that needs fast structured storage.
> >>>>
> >>>>My system is called DDS (data desktop server) and is simply a dbus
> >>>>wrapper around the embedded mysql DB.
> >>>
> >>>
> >>>please don't use MySQL directly! First, you will impose users to install
> >>>and configure a DB server, which might not be possible in all cases.
> >>
> >>the *embedded* version of mysql is just a shared object - you dont need
> >>to install the full mysql to get it. RPMs for the *embedded* version are
> >>on mysql's website. The *embedded* mysql is the same as sqlite in that
> >>regard.
> > 
> > 
> > I presume that ny metadata system really should be part of the
> > platform so that other apps can access it; that would rule out mysql
> > on licensing concerns.
> 
> with a dbus wrapper around it the license becomes irrelevant. The dbus 
> server end of DDS will be GPL but the client end libDDS will be LGPL. 
> IPC is a great way to eliminate GPL dependencies!

That is a runaround the GPL.  Not something I would like to see GNOME
set precedence on.

-- 
John (J5) Palmieri <johnp redhat com>