HLRmon: a role-based grid accounting report web tool
Stefano Dal Pra, Enrico Fattibene, Giuseppe Misurelli, F Pescarmona, Luciano Gaido · Journal of Physics Conference Series · 2008
Both Grid users and Grid operators need ways to get CPU usage statistics about jobs executed in a given time period at various different levels, depending on their specific Grid's role and rights. While a Grid user is interested in reports about its own jobs and should not get access to other's data, Site or Virtual Organization (VO) or Regional Operation Centre (ROC) manager would also like to see how resources are used through the Grid in a per Site or per VO basis, or both. The whole set of different reports turns out to be quite large, and various existing tools made to create them tend to better satisfy a single user's category, eventually despite of another. HLRmon[1] results from our efforts to generate suitable reports for all existing categories and has been designed to serve them within a unified layout. Thanks to its ability to authenticate clients through certificate and related authorization rights, it can a-priori restrict the selectable items range offered to the web user, so that sensitive information can only be provided to specifically enabled people. Information are gathered by HLRmon from a Home Location Register (HLR) which stores complete accounting data in a per job basis. Depending on the kind of reports that are to be generated, it directly queries the HLR server using an ad-hoc Distributed Grid Accounting System (DGAS[2]) query tool (tipically user's level detail info), or a local RDBMS table with daily aggregate information in a per Day, Site, VO basis, thus saving connection delay time and needless load on the HLR server.