1. MDS2 alpha Testing Phase
INFN Testbed-IS team
DataGrid Workshop
Oxford, 2-5 July 2001
A. Cavalli MDS2 TESTING PHASE

2. Introduction The 1st phase: The 2nd phase:
test with 1st alpha release;
done in collaboration with a WP3 member;
response times were similar to MDS-2.0 but…
different topology from MDS-2.0 tests.
The 2nd phase:
test with 2nd alpha release;
tested also scalability (GIIS hierarchy);
compared MDS-2.0 & ‘alpha release’ response times on the same topology.
A. Cavalli MDS2 TESTING PHASE

3. (performances reported in the graphs)
Test Topology
FIRST PHASE
A GIIS with a local GRIS + two other GRISes
SECOND PHASE
(performances reported in the graphs)
A TOP GIIS with 2 site GIISes (& GRIS) + 1 additional GRIS
A. Cavalli MDS2 TESTING PHASE

4. FREE CPU & EXPIRED CACHE
MDS 2.0
MDS 2 alpha
A. Cavalli MDS2 TESTING PHASE

5. FREE CPU & CACHE GOOD MDS 2.0 MDS 2 alpha
A. Cavalli MDS2 TESTING PHASE

6. LOADED CPU & EXPIRED CACHE
MDS 2.0
the scale is different
from other slides
MDS 2 alpha
A. Cavalli MDS2 TESTING PHASE

7. LOADED CPU & CACHE GOOD MDS 2.0 MDS 2 alpha
A. Cavalli MDS2 TESTING PHASE

8. Tests conclusions
MDS 2 alpha GIIS seems to be a little bit slower than MDS 2.0.
The GRIS is faster, even if it’s busy, but still not as fast as we would like.
As shown, you can deploy a GIIS hierarchy like the one implemented with MDS 2.0
Search timeouts seem to be better managed.
Basic root objects are always cached (also in MDS 2.0 with latest backend).
A. Cavalli MDS2 TESTING PHASE

9. Bug-fixes
Inconsistency in the GRIS filesystem information provider (attribute “hn” instead of “hostname”).
Wrong TTL variable for cache managing in GIIS backend (“get_CACHE_TTL” instead of “TTL”).
A. Cavalli MDS2 TESTING PHASE

10. Open Issues
SECURITY: still some problems retrieving info with “anonymousbind” disabled in the GIIS configuration.
BACKEND: the current GIIS backend returns duplicated root objects in some cases.
VOs : we managed to register twice an MDS-2.0 GRIS on different GIISes. Now we hope that it will be more friendly with this new release.
A. Cavalli MDS2 TESTING PHASE