Speaker
Mr
Laurence Field
(CERN)
Description
Grid Information Systems are mission-critical components for production grid
infrastructures. They provide detailed information which is needed for the
optimal distribution of jobs, data management and overall monitoring of the
Grid. As the number of sites within these infrastructure continues to grow,
it must be understood if the current systems have the capacity to handle the
extra load. EGEE is the worlds largest production grid infrastructure and
hence puts the greatest demands on its information system.
Currently 230 sites publish 23 MBytes every 2 minutes into the system and
single top level nodes have seen 2 million queries per day. We expect this to
grow in the next two years by a factor 5 to 10.
This paper describes the current requirements for the EGEE information
system obtained from monitoring the usage patterns. From this data, a number
of test conditions are derived for determining the subsequent performance
and scalability of a grid information system. The tests are then applied to
the BDII, which is the information system implementation used by the EGEE
infrastructure. The results are given and show the limits of the underlying
OpenLDAP Server implementation used within BDII. As a consequence, new
techniques and concepts for enhancing the performance are suggested.
Authors
Mr
Felix Ehm
(CERN)
Mr
Laurence Field
(CERN)
