HECToR Monthly Report, October 2008
Information on the utilisation, disk allocations, slowdowns and helpdesk statistics can be found in the associated SAFE monthly report.
Dates covered: 08:00 1 October 2008 to 08:00 1 November 2008
Number of hours: 744
1: Availability
Scheduled down time: 17 hours 49 minutes.
Incidents
The following incidents were recorded:
| Severity | Number |
| 1 | 3 |
| 2 | 0 |
| 3 | 20 |
| 4 | 0 |
Of the four severity levels, level 1 corresponds to a contractual failure.
All of the above SEV-3 Incidents were attributed to single node failures.
Details of severity level 1 incidents
| ID | Date | Description | Length | Attribution |
| Incident-426 | 02/10/2008 | NID renumbering caused applications to be unplaced | 13:28 | Cray |
| Incident-429 | 03/10/2008 | Link failure | 01:06 | Cray |
| Incident-444 | 21/10/2008 | Lustre errors made system unusable | 01:30 | Cray |
MTBF and Serviceability
| Attribution | Failures | MTBF | UDT | Serviceability |
| Cray | 3 | 244 | 16:04:00 | 97.7% |
| Site | 0 | ∞ | 00:00:00 | 100% |
| External | 0 | ∞ | 00:00:00 | 100% |
| Other | 0 | ∞ | 00:00:00 | 100% |
| Overall | 3 | 244 | 16:04:00 | 97.7% |
- 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 | 8 |
| MCA bk0 error (Internal Opteron) | 6 |
| UME bk0/bk4 (Dimms) | 4 |
| Heartbeat Fault | 2 |
2: Courses
This information is supplied by NAG Ltd
| Title of Course | Dates | Available places | Ordinary attendees | Paying attendees | CSE Staff | Total attending |
| Introduction to HECToR, NAG Oxford | 7 October 2008 | 20 | 6 | 0 | 0 | 6 |
| Tools and Techniques for Optimising Code on HECToR, NAG Oxford | 8 - 10 October2008 | 12 | 2 | 0 | 0 | 2 |
| Introduction to MPI, Birmingham University (1) | 14 - 16 October, 2008 | 20 | 22 | 0 | 0 | 22 |
| X2 programming, NAG Oxford (2) | 21 October, 2008 | 12 | 0 | 0 | 0 | 0 |
| Portability and Maintainability, NAG Oxford (3) | 23 - 24 October, 2008 | 12 | 0 | 0 | 0 | 0 |
| Scientific visualisation, NAG Oxford (4) | 27 - 28 October, 2008 | 12 | 0 | 0 | 0 | 0 |
| Testing and Benchmarking, NAG Oxford (5) | 29 October, 2008 | 12 | 0 | 0 | 0 | 0 |
(1) 5 people were turned away.
(2) Cancelled. 1 person registered, but by mutual agreement will attend in December instead
(3) Cancelled.
(4) Cancelled. 1 person registered, but after discussion it was agreed the course did not meet their needs
(5) Cancelled.
3: Quality tokens
None set this month.4: Hours worked
| Group | Days worked | FTEs |
| USL | 64.9 | 3.7 |
| OSG | 88.7 | 5.0 |
5: Performance metrics
Technology Provision
| Description | TSL | FSL | Value |
| Technology reliability | 85% | 98.5% | 97.7% |
| Technology throughput | 7000 hours | 8367 hours | 8377 hours |
| Capability job completion rate | 70% | 90% | 98% |
| 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% | 99% |
| Number of SP FTEs | 7.3 | 8.0 | 8.7 | 8.7 |
| SP serviceability | 80% | 99% | 99.5% | 100% |
