Grid Information Systems: Past, Present and Future

Grid information systems enable the discovery of resources in a Grid computing infrastructure and provide further information about their structure and state. The original concepts for a grid information system were defined over 20 years ago and the GLUE 2.0 information model specification was published 10 years ago. This contribution describes the current status and highlights the changes over the years. It provides an overview of the today's usage from analysing the system logs and compares this with results from over a decade ago. A critical analysis of the system is provided with lessons learnt and some perspectives for the future.