HECToR Monthly Report, January 2012
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: 60 hours 37 minutes. This includes extended maintenance
required for the Phase 3 upgrade and acceptance testing.
The following incidents were recorded:
Of the four severity levels, level 1 corresponds to a contractual failure.
Out of the 21 SEV-3 Incidents, 21 were attributed to node failure events.
Details of severity level 1 incidents
|Incident-7176||24/01/2012||System hung after "warmswap" problem||09:01||Cray|
|Incident-7186||27/01/2012||Acceptance tests overrun||23:32||Cray|
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||10|
|HT lockup error||3|
|Module voltage fault||3|
|Software error - kernel panic||3|
|Thermtrip on Opteron processor (Failed during acceptance testing)(*)||1|
|Admindown by Node Health Check script(*)||1|
(*) 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|
|OpenMP, Imperial College||5-6 January 2012||45||10||0||0||10|
|Parallel Programming with MPI, Imperial College||9 - 11 January 2012||45||19||1||0||19|
|An Introduction to CUDA Programming, University of Leicester||24 - 25 January 2012||25||10||6||0||16|
5: Performance Metrics
|Technology throughput||7000 hours||8367 hours||7651 hours|
|Capability job completion rate||70%||90%||93.3%|
|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||8.8|