HECToR Monthly Report, July 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 July 2008 to 08:00 1 August 2008
Number of hours: 720
1: Availability
Scheduled down time: 11 hours 37 minutes.
Incidents
The following incidents were recorded:
| Severity | Number |
| 1 | 7 |
| 2 | 0 |
| 3 | 35 |
| 4 | 0 |
Of the four severity levels, level 1 corresponds to a contractual failure.
Details of severity level 1 incidents
| ID | Date | Description | Length | Attribution |
| Incident-291 | 01/07/2008 | Lustre failure after loss of OSS node | 05:15 | Cray |
| Incident-295 | 03/07/2008 | Lustre fail after SCSI errors | 03:50 | Cray |
| Incident-297 | 06/07/2008 | HSN collapse after compute node failure | 03:18 | Cray |
| Incident-311 | 13/07/2008 | Machine fail after RX Packet error | 01:55 | Cray |
| Incident-320 | 21/07/2008 | Fatal link error | 02:19 | Cray |
| Incident-324 | 24/07/2008 | OST node failed after SCSI error | 06:44 | Cray |
| Incident-336 | 31/07/2008 | OST 16 failed leading to utter collapse. | 04:28 | Cray |
MTBF and Serviceability
| Attribution | Failures | MTBF | UDT | Serviceability |
| Cray | 7 | 105 | 27:49:00 | 96.2% |
| Site | 0 | ~ | 00:00:00 | 100% |
| External | 0 | ~ | 00:00:00 | 100% |
| Other | 0 | ~ | 00:00:00 | 100% |
| Overall | 7 | 105 | 27:49:00 | 96.2% |
- Note 1: Serviceability%= 100*(WCT-SDT-UDT)/(WCT-SDT)
- Note 2: MTBF (Mean Time Between Failures) is defined as 732/Number of failures.
2: Courses
This information is supplied by NAG Ltd
| Title of Course | Dates | Available places | Total attending | HECToR Users | HECToR Staff |
| 14 July 2008 | Introduction to HECToR | 20 | 3 | 2 | 0 |
| 18 July 2008 | Introduction to HECToR | 12 | 3 | 2 | 0 |
| 21-23 July 2008 | Tools and Techniques for Optimising Parallel Codes | 12 | 1 | 0 | 0 |
There was a course on Testing and Benchmarking scheduled for 18 July but there was no take-up.
3: Quality tokens
None set this month
4: Hours worked
| Group | Days worked | FTEs |
| USL | 76.3 | 4.3 |
| OSG | 65 | 3.7 |
5: Performance metrics
Technology Provision
| Description | TSL | FSL | Value |
| Technology reliability | 85% | 98.5% | 96.2% |
| Technology throughput | 7000 hours | 8367 hours | 8311 hours |
| Capability job completion rate | 70% | 90% | 91 % |
| Technology MTBF | 100 hours | 126.4 hours | 105 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 | 8.0 |
| SP serviceability | 80% | 99% | 99.5% | 100% |
