APEL

The EGEE Accounting Service, comprised of data collection and reporting services, is a large centralised database which collects and aggregates CPU usage information from sites across the Grid through different types of sensors. APEL (Accounting Processor for Event Logs) is a component of the EGEE CPU Accounting system, distributed as part of the gLite middleware. APEL parses batch system and Grid gatekeeper logs at each Grid site to generate CPU usage records and publishes them into a centralised repository at a GOC (Grid Operations Centre) using R-GMA as the transport mechanism. The records are processed and summarised and can then be accessed through the EGEE Accounting Portal.

Read more about the EGEE/WLCG Accounting service