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
1: Availability
Scheduled down time: 15 hours 40 minutes. This includes extended maintenance
required for the Phase 3 upgrade.
Incidents
The following incidents were recorded:
| Severity | Number |
| 1 | 1 |
| 2 | 0 |
| 3 | 25 |
| 4 | 0 |
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
| ID | Date | Description | Length | Attribution |
| Incident-7051 | 21/12/2011 | Maintenance overrun | 00:39 | Cray |
MTBF and Serviceability
| Attribution | Failures | MTBF | UDT | Serviceability |
| Cray | 1 | 732 | 00:39 | 99.9% |
| Site | 0 | ∞ | 00:00 | 100.0% |
| External | 0 | ∞ | 00:00 | 100.0% |
| Other/Unknown | 0 | ∞ | 00:00 | 100.0% |
| Overall | 1 | 732 | 00:39 | 99.9% |
- 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
| Error Type | Number |
| MCA bank 4 error | 6 |
| HT lockup error | 3 |
| Heartbeat 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: Courses
This 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 Provision
| Description | TSL | FSL | Value |
| Technology reliability | 85% | 98.5% | 99.9% |
| 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
Service Provision
| Description | TSL | FSL | USL | Value |
| Percentage of non-in-depth queries resolved within one day | 85% | 97% | 99% | 99.2% |
| Number of SP FTEs | 7.3 | 8.0 | 8.7 | 7.4 |
| SP Serviceability | 80% | 99% | 99.5% | 100% |
