HECToR Monthly Report, October 2010
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 2a service only. Performance statistics for the non-contractual Phase 2b system can be found here.
Dates covered: 08:00 1 October 2010 to 08:00 1 November 2010
Number of hours: 744
1: Availability
Scheduled down time: 243 hours 40 minutes. This includes an extended downtime for extensive Phase 2a testing, from 15 October 2010 to 26 October 2010, in preparation for the esFS upgrade.
Incidents
The following incidents were recorded:
| Severity | Number |
| 1 | 3 |
| 2 | 0 |
| 3 | 12 |
| 4 | 0 |
Of the four severity levels, level 1 corresponds to a contractual failure.
Out of the 12 SEV-3 Incidents, 12 were attributed to single node failure events.
Details of severity level 1 incidents
| ID | Date | Description | Length | Attribution |
| Incident-4896 | 23/10/2010 | Closedown due to security vulnerability | 60:00 | Cray |
| Incident-4911 | 26/10/2010 | OSS node failure | 01:31 | Cray |
| Incident-4931 | 27/10/2010 | PBS restarted in error | 00:29 | Cray |
MTBF and Serviceability
| Attribution | Failures | MTBF | UDT | Serviceability |
| Cray | 3 | 244 | 62:00 | 87.6% |
| Site | 0 | ∞ | 00:00 | 100% |
| External | 0 | ∞ | 00:00 | 100% |
| Other | 0 | ∞ | 00:00 | 100% |
| Overall | 3 | 244 | 62:00 | 87.6% |
- 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 |
| RX message header CRC Error | 9 |
| RX message CRC Error | 1 |
| Software error - kernel panic | 1 |
| Heartbeat error | 1 |
2: Courses
This information is supplied by NAG Ltd| Title of Course | Dates | Available Places | Ordinary Attendees | Paying Attendees | CSE Staff | Total Attending |
| Debugging with DDT, NAG Manchester | 18 October 2010 | 20 | 3 | 0 | 8 | 11 |
| Fortran 95, University of Warwick | 18-20 October 2010 | 20 | 14 | 0 | 0 | 14 |
| DL_POLY, NAG Manchester | 20-21 October 2010 | 20 | 19 | 1 | 0 | 20 |
| Scientific Visualisation, University of Reading | 28 October 2010 | 20 | 17 | 0 | 0 | 17 |
3: Quality Tokens
| Date | Tokens Awarded | Comment | Consortium |
| 05-Oct-2010 12:33:21 | • | One negative token; no comment from the user | e82 |
4: Hours Worked
| Group | Days worked | FTEs |
| USL | 69.5 | 3.9 |
| OSG | 74.8 | 4.2 |
5: Performance Metrics
Technology Provision
| Description | TSL | FSL | Value |
| Technology reliability | 85% | 98.5% | 87.6% |
| Technology throughput | 7000 hours | 8367 hours | 5116 hours |
| Capability job completion rate | 70% | 90% | 94.3% |
| Technology MTBF | 100 hours | 126.4 hours | 244 |
Note: Technology throughput is calculated: 12*(732-UDT-SDT); 732 - 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% | 99.3% |
| Number of SP FTEs | 7.3 | 8.0 | 8.7 | 8.1 |
| SP Serviceability | 80% | 99% | 99.5% | 100% |
