From Globus LDAP to R-GMA SQL

SQL provides a relational database. There are several excellent implementations of this database, that are designed for extremely demanding applications.

They offer a good compromise between the distributedness, and the cost of query operations.

In particular the database can be replicated in order to improve scalability and fault tolerance, as long as the number of queries operations dominates the number of writes.

The R-GMA architecture was developed to address this problem: the scalability of the architecture is further improved introducing components that combine data from the database and cache the results (similar to NWS forecasters).

Scalability of an end-to-end architecture

Globus and LDAP

up: A modular approach to Grid Connectivity Monitoring