HECToR Monthly Report, April 2013
Information on the utilisation, disk allocations, slowdowns and helpdesk statistics can be found in the associated SAFE monthly report.
Dates covered: 08:00 1 April 2013 to 08:00 1 May 2013
Number of hours: 720
1: Availability
Scheduled down time: 0 hours 0 minutes.
Incidents
The following incidents were recorded:
| Severity | Number |
| 1 | 1 |
| 2 | 0 |
| 3 | 8 |
| 4 | 0 |
Of the four severity levels, level 1 corresponds to a contractual failure.
Out of the 8 SEV-3 Incidents, 8 were attributed to node failure events.
Details of severity level 1 incidents
| ID | Date | Description | Length | Attribution |
| Incident-8401 | 19/04/2013 | PBS scheduler failed after job saturation | 15:07 | Cray |
MTBF and Serviceability
| Attribution | Failures | MTBF | UDT | Serviceability |
| Cray | 1 | 732 | 15:07 | 97.9% |
| Site | 0 | ∞ | 00:00 | 100% |
| External | 0 | ∞ | 00:00 | 100% |
| Other/Unknown | 0 | ∞ | 00:00 | 100% |
| Overall | 1 | 732 | 15:07 | 97.9% |
- 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 |
| MCE bk2-bk4 error (Opteron) | 3 |
| 31 nodes failed de to bug#796486 | 1 |
| Heartbeat error | 1 |
| Gemini related failure | 1 |
| Kernel panic (bug#790101) | 1 |
| Nine nodes failed when running user job (bug#796937) | 1 |
2: Courses
This information is supplied by NAG Ltd
| Title of Course | Dates | Available Places | Ordinary Attendees | Paying Attendees | CSE Staff | Total Attending |
| Fortran 95, Culham Science Centre | 9 - 11 April 2013 | 18 | 15 | 1 | 0 | 16 |
| Advanced Computational Methods II (MSc), University of Southampton | 19, 26 April 2013 | 30 | 30 | 0 | 0 | 30 |
3: Quality Tokens
None set this month
4: Hours Worked
| Group | Days worked | FTEs |
| USL | 70.8 | 4.0 |
| OSG | 76.3 | 4.3 |
5: Performance Metrics
Technology Provision
| Description | TSL | FSL | Value |
| Technology reliability | 85% | 98.5% | 97.9% |
| Technology throughput | 7000 hours | 8367 hours | 8602 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% | 98.1% |
| Number of SP FTEs | 7.3 | 8.0 | 8.7 | 8.3 |
| SP Serviceability | 80% | 99% | 99.5% | 100% |
