GGUS – Global Grid User Support
Monitoring of services and evaluation of
accessibility, effectiveness and usability the Tier-1 centre is realized by using special tools developed by WLCG or the CMS collaboration in two main areas:
- monitoring of readiness the centres,
- monitoring of usage and performance of resources.
Statistics obtained in the results of the monitoring is published daily,
and noticed failures are recorded in the GGUS ticket system used to track problems on sites.
Statistics of opened/closed tickets can also serve as a criterion
of the effectiveness of the Tier-1 site.
The report on the readiness of the site summarizes all metrics and represents a cumulative current status of the availability and performance of the site.
The readiness status of the site is taken into account by the
Central Control Unit when planning activities within the CMS collaboration.
Both planned and unplanned downtimes of the site are taken into account.