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3 Access to accounting information

DEISA enables users and supervisors of DECI or community projects to obtain actual information about their usage of DEISA HPC computing resources. The DEISA Accounting Report Tool (DART), a Java implemented client, gathers accounting information (e.g., normalized computing time) from all DEISA sites and HPC machines on which related jobs have been executed during a queried time window.

Based on this collected information DART generates a user or project specific report on the distributed usage of computing resources within DEISA.

Usage is displayed as 'job time' (the wall clock time of the job multiplied with the number of reserved cores) and 'CPU time'(the total CPU time used on all cores). For 'job time', two values are displayed: a normalised value in standardised DEISA core-hours and the non-normalised core-h(ours). For 'CPU time', only one value is displayed: the CPU time in standardised DEISA core-hours. This aggregated value is calculated applying machine-specific normalization factors which are reflecting the computing power of each HPC system in DEISA.

Project administrators can display usage for all projects for which they are authorised by providing as wild card * or all as project name.

User administrators at the DEISA sites are able to obtain accounting information from all the users and projects which are hosted by them (DEISA home site). It is possible that users can request accounting information directly from their Home Site.

For authentication, users and project supervisors need a valid Grid certificate to employ the DART.

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