HECToR Monthly Report, May 2011
Information on the utilisation, disk allocations, slowdowns and helpdesk statistics can be found in the associated SAFE monthly report.
This report relates to the Phase 2b service only. Performance statistics for the non-contractual Phase 2a system can be found here.
Dates covered: 08:00 1 May 2011 to 08:00 1 June 2011
Number of hours: 744
1: Availability
Scheduled down time: 10 hours 51 minutes.
Incidents
The following incidents were recorded:
| Severity | Number |
| 1 | 2 |
| 2 | 0 |
| 3 | 46 |
| 4 | 0 |
Of the four severity levels, level 1 corresponds to a contractual failure.
Out of the 46 SEV-3 Incidents, 46 were attributed to node failure events.
Details of severity level 1 incidents
| ID | Date | Description | Length | Attribution |
| Incident-6326 | 12/05/2011 | esFS problem | 06:38 | Cray |
| Incident-6516 | 30/05/2011 | External power failure | 25:33 | External |
MTBF and Serviceability
| Attribution | Failures | MTBF | UDT | Serviceability |
| Cray | 1 | 732 | 06:38 | 99.1% |
| Site | 0 | ∞ | 00:00 | 100% |
| External | 1 | 732 | 25:33 | 96.5% |
| Other | 0 | ∞ | 00:00 | 100% |
| Overall | 2 | 366 | 32:11 | 95.6% |
- 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 |
| Software error (bug #771936) | 18 (6 occurred during testing) |
| Software error (bug #764343) | 13 (2 occurred during testing) |
| Software error (bug #770935) | 8 |
| HT lockup | 1 |
| MCA bank 1/ bank 4 error | 6 |
2: Courses
This information is supplied by NAG Ltd| Title of Course | Dates | Available Places | Ordinary Attendees | Paying Attendees | CSE Staff | Total Attending |
| OpenMP, University College London | 10-11 May 2011 | 12 | 12 | 0 | 0 | 12 |
| An Introduction to CUDA Programming, NAG Oxford | 23-24 May 2011 | 14 | 12 | 1 | 0 | 13 |
| OpenMP, University of Bath | 24-25 May 2011 | 32 | 11 | 0 | 0 | 11 |
| An Introduction to OpenCL Programming, NAG Oxford | 25-26 May 2011 | 14 | 12 | 0 | 0 | 12 |
| Advanced Computational Methods II (MSc), University of Southampton | Three Tuesdays in May 2011 | 20 | 20 | 0 | 0 | 20 |
3: Quality Tokens
| Date | Tokens Awarded | Comment | Consortium |
| 05/05/2011 | * * * * * | Five positive tokens. No comment from the user | e05 |
4: Hours Worked
| Group | Days worked | FTEs |
| USL | 98.7 | 5.6 |
| OSG | 79.7 | 4.5 |
5: Performance Metrics
Technology Provision
| Description | TSL | FSL | Value |
| Technology reliability | 85% | 98.5% | 99.1% |
| Technology throughput | 7000 hours | 8367 hours | 8267 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% | 99.6% |
| Number of SP FTEs | 7.3 | 8.0 | 8.7 | 10.1 |
| SP Serviceability | 80% | 99% | 99.5% | 100% |
