HECToR Monthly Report, December 2011
Information on the utilisation, disk allocations, slowdowns and helpdesk statistics can be found in the associated SAFE monthly report.
Dates covered: 08:00 1 December 2011 to 08:00 1 January 2012
Number of hours: 744
Scheduled down time: 15 hours 40 minutes. This includes extended maintenance
required for the Phase 3 upgrade.
The following incidents were recorded:
Of the four severity levels, level 1 corresponds to a contractual failure.
Out of the 25 SEV-3 Incidents, 25 were attributed to node failure events.
Details of severity level 1 incidents
MTBF and Serviceability
- Note 1: Serviceability%= 100*(WCT-SDT-UDT)/(WCT-SDT)
- Note 2: MTBF (Mean Time Between Failures) is defined as 732/Number of failures.
Details of single node failures
|MCA bank 4 error||6|
|HT lockup error||3|
|Software error - kernel panic||2|
|Opteron link protocol error||1|
|Cold start - no return after maintenance(*)||1|
|Admin down (*)||10|
(*) No user job lost
2: CoursesThis information is supplied by NAG Ltd
|Title of Course||Dates||Available Places||Ordinary Attendees||Paying Attendees||CSE Staff||Total Attending|
|SPRINT, NAG Oxford||1 December 2011||12||5||0||0||5|
|Fortran 95, University of Warwick||12 - 14 December 2011||20||18||1||0||19|
5: Performance Metrics
|Technology throughput||7000 hours||8367 hours||8588 hours|
|Capability job completion rate||70%||90%||100%|
|Technology MTBF||100 hours||126.4 hours||732|
Note: Technology throughput is calculated: 12*(732-UDT-SDT), where 732 is the annual average number of hours in a month.
Note: MTBF is calculated as 732/number of failures
|Percentage of non-in-depth |
queries resolved within one day
|Number of SP FTEs||7.3||8.0||8.7||7.4|