perfsonar development work

[Slawomir Trzaszczka <>]

On Thu, 2009-11-26 at 16:12 +0000, Antoine Delvaux wrote:
> Hi Slawek,
> 
> Indeed, interesting work and results.  We can say that pSbase2 is about 2 
> times more efficient than pSbase1, so we're already hoping for pSbase10 ;-)
> 
> I guess you performed those tests in a serial fashion: doing all 
> registrations, than all queries, then all deregistrations.  Would doing it 
> in a more random fashion (registrations, queries and deregistrations not 
> happening all together), more similar to real world usage, change the 
> result pattern?
> 
No,

In registration I registered 150 x 100 or 150 x 500 or 100 x 1000
services.
Next steps (querying/deregistrations) based on first step (database
contains data from registration step). 
Next I done query/deregistration on some selected elements. List of this
elements was constant but after every test. database was dropped. 

I can perform some "chain of operation" (registration, query,
deregistration) with  control parameters and test it. For example
(R-Registering,Q-querying,D-deregistering)

--------------------------------
loop N-iteration:
        begin
                R
                R
                Q
                R
                Q
                D
        end

finally:
    D for all registered
--------------------------------

Regards,

Slawek


> You say the bottleneck is eXistDB, would it be possible to make a prototype 
> using some other DB engine like Postgresql to see if there could be any 
> other performance gain.  Or does our code uses advanced XML functions only 
> provided by eXistDB?
> 
> Beste regards,
> --
> Antoine Delvaux                                    Systems Engineer
> DANTE                                                 Skype: toninb
> http://www.dante.net                            Tel: +221.778197275
> PGP fingerprint: DC65 0D8B 6938 9229 33C3  18CA 4EB6 09D3 A333 3378
> 
> 
> 
> 
-- 
+--------------------------------------------+
 Slawomir Trzaszczka                       
                                           
 Poznan Supercomputing & Networking Center 
+--------------------------------------------+