HECToR Monthly Report, August 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 August 2010 to 08:00 1 September 2010
Number of hours: 744
1: Availability
Scheduled down time: 25 hours 59 minutes (includes the full site power down on 18/8/2010 for 15 hours).
Incidents
The following incidents were recorded:
| Severity | Number |
| 1 | 2 |
| 2 | 2 |
| 3 | 19 |
| 4 | 0 |
Of the four severity levels, level 1 corresponds to a contractual failure.
Out of the 19 SEV-3 Incidents, 19 were attributed to single node failure events.
Details of severity level 1 incidents
| ID | Date | Description | Length | Attribution |
| Incident-4271 | 16/08/2010 | Voltage fault | 06:54 | Cray |
| Incident-4356 | 25/08/2010 | Node failure provoked HSN collapse | 03:28 | Cray |
MTBF and Serviceability
| Attribution | Failures | MTBF | UDT | Serviceability |
| Cray | 2 | 366 | 10:22:00 | 98.6% |
| Site | 0 | ∞ | 00:00:00 | 100% |
| External | 0 | ∞ | 00:00:00 | 100% |
| Other | 0 | ∞ | 00:00:00 | 100% |
| Overall | 2 | 366 | 10:22:00 | 98.6% |
- 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 | 5 |
| RX message CRC Error | 5 |
| RX packet sequence number error | 2 |
| MCA bk0-bk4 error | 4 |
| Software/application related error | 1 |
| Node(s) admin down | 1 |
| Node(s) cold started | 1 |
2: Courses
This information is supplied by NAG LtdThere were no courses in August.
3: Quality Tokens
| Date | Tokens Awarded | Comment | Consortium |
| 20-Aug-2010 17:09:44 | * * * * * | Positive feedback; no comment from the user | e125/e24 |
4: Hours Worked
| Group | Days worked | FTEs |
| USL | 74.3 | 4.2 |
| OSG | 85.3 | 4.8 |
5: Performance Metrics
Technology Provision
| Description | TSL | FSL | Value |
| Technology reliability | 85% | 98.5% | 98.6% |
| Technology throughput | 7000 hours | 8367 hours | 8347 hours |
| Capability job completion rate | 70% | 90% | 98.1% |
| Technology MTBF | 100 hours | 126.4 hours | 366 |
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% |
| Number of SP FTEs | 7.3 | 8.0 | 8.7 | 9.0 |
| SP Serviceability | 80% | 99% | 99.5% | 100% |
