HECToR Monthly Report, July 2009
Information on the utilisation, disk allocations, slowdowns and helpdesk statistics can be found in the associated SAFE monthly report.
Dates covered: 08:00 1 July 2009 to 08:00 1 August 2009
Number of hours: 744
1: Availability
Scheduled down time: 50 hours 21 minutes. This includes downtime for Phase 2A upgrade.
Incidents
The following incidents were recorded:
| Severity | Number |
| 1 | 4 |
| 2 | 1 |
| 3 | 47 |
| 4 | 0 |
Of the four severity levels, level 1 corresponds to a contractual failure.
Out of the 47 SEV-3 Incidents, 47 were attributed to single node failures.
Details of severity level 1 incidents
| ID | Date | Description | Length | Attribution |
| Incident-1771 | 02/07/2009 | HSN contention caused full system failure | 01:44 | Cray |
| Incident-1806 | 06/07/2009 | /etc/nologin set by closedown script | 00:15 | OSG |
| Incident-1846 | 09/07/2009 | Link Inactive error | 01:08 | Cray |
| Incident-1996 | 24/07/2009 | Link Inactive error | 01:30 | Cray |
MTBF and Serviceability
| Attribution | Failures | MTBF | UDT | Serviceability |
| Cray | 3 | 244 | 04:22:00 | 99.4% |
| Site | 1 | 732 | 00:15:00 | 99.9% |
| External | 0 | ∞ | 00:00:00 | 100% |
| Other | 0 | ∞ | 00:00:00 | 100% |
| Overall | 4 | 183 | 04:37:00 | 99.3% |
- 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 XT single node failures
| Error Type | Number |
| UME bk0/bk4 (Dimms) | 27 |
| RX message header CRC Error | 16 |
| Heartbeat faults | 4 |
2: Courses
This information is supplied by NAG Ltd| Title of Course | Dates | Available Places | Ordinary Attendees | Paying Attendees | CSE Staff | Total Attending |
| OpenMP and Mixed Mode Programming, Queens University of Belfast | 1 - 2 July 2009 | 24 | 12 | 0 | 0 | 12 |
| NERC Summer School, Beginner Stream, BAS Cambridge | 8 - 9 July 2009 | 17 | 17 | 0 | 0 | 17 |
| NERC Summer School, Advanced Stream, BAS Cambridge | 8 - 9 July 2009 | 16 | 16 | 0 | 0 | 16 |
3: Quality Tokens
None set this month.4: Hours Worked
| Group | Days worked | FTEs |
| USL | 91.5 | 5.2 |
| OSG | 68.4 | 3.8 |
5: Performance Metrics
Technology Provision
| Description | TSL | FSL | Value |
| Technology reliability | 85% | 98.5% | 99.4% |
| Technology throughput | 7000 hours | 8367 hours | 8124 hours |
| Capability job completion rate | 70% | 90% | 96.3 % |
| Technology MTBF | 100 hours | 126.4 hours | 244 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% | 100% |
| Number of SP FTEs | 7.3 | 8.0 | 8.7 | 9.0 |
| SP Serviceability | 80% | 99% | 99.5% | 99.9% |
