HECToR Monthly Report, December 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 December 2010 to 08:00 1 January 2011
Number of hours: 720
1: Availability
Scheduled down time: 12 hours 43 minutes.
Incidents
The following incidents were recorded:
| Severity | Number |
| 1 | 5 |
| 2 | 0 |
| 3 | 10 |
| 4 | 0 |
Of the four severity levels, level 1 corresponds to a contractual failure.
Out of the 9 SEV-3 Incidents, 9 were attributed to single node failure events.
Details of severity level 1 incidents
| ID | Date | Description | Length | Attribution |
| Incident-5306 | 01/12/2010 | Blue Arc Failure /home file system hung | 02:48 | Cray |
| Incident-5316 | 04/12/2010 | Cabinet Emergency Power Off | 37:25 | Cray |
| Incident-5331 | 08/12/2010 | Link Inactive | 01:49 | Cray |
| Incident-5341 | 12/12/2010 | Link Inactive | 01:47 | Cray |
| Incident-5416 | 28/12/2010 | Voltage Fault on Module | 01:37 | Cray |
MTBF and Serviceability
| Attribution | Failures | MTBF | UDT | Serviceability |
| Cray | 5 | 146 | 45:26 | 93.8% |
| Site | 0 | ∞ | 00:00 | 100% |
| External | 0 | ∞ | 00:00 | 100% |
| Other | 0 | ∞ | 00:00 | 100% |
| Overall | 5 | 146 | 45:26 | 93.8% |
- 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 CRC Error | 2 |
| RX message header CRC Error | 5 |
| Software error - kernel panic | 2 |
2: Courses
This information is supplied by NAG Ltd| Title of Course | Dates | Available Places | Ordinary Attendees | Paying Attendees | CSE Staff | Total Attending |
| Parallel IO, University of Warwick | 6 December 2010 | 20 | 12 | 0 | 0 | 12 |
| Parallel Programming with MPI, University College London | 12 - 14 December 2010 | 12 | 9 | 0 | 0 | 9 |
3: Quality Tokens
| Date | Tokens Awarded | Comment | Consortium |
| 08/12/2010 | • • • • • | Negative Tokens. No comments from the user. Tokens awarded same day as system failure | n02 |
| 18/12/2010 | * * * * * | Fast! Beginning users questions and answers quickly resolved. Thanks | x01 |
| 29/12/2010 | * * * * | Phase2B System is now excellent | e82 |
4: Hours Worked
| Group | Days worked | FTEs |
| USL | 67.1 | 3.8 |
| OSG | 67.6 | 3.8 |
5: Performance Metrics
Technology Provision
| Description | TSL | FSL | Value |
| Technology reliability | 85% | 98.5% | 93.8% |
| Technology throughput | 7000 hours | 8367 hours | 8088 hours |
| Capability job completion rate | 70% | 90% | 100.0% |
| Technology MTBF | 100 hours | 126.4 hours | 146 hours |
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% | 98.2% |
| Number of SP FTEs | 7.3 | 8.0 | 8.7 | 7.6 |
| SP Serviceability | 80% | 99% | 99.5% | 100% |
