HECToR Monthly Report, December 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 December 2008 to 08:00 1 January 2009
Number of hours: 720
1: Availability
Scheduled down time: 28 hours 39 minutes.
Incidents
The following incidents were recorded:
| Severity | Number |
| 1 | 5 |
| 2 | 0 |
| 3 | 30 |
| 4 | 0 |
Of the four severity levels, level 1 corresponds to a contractual failure.
Out of the 30 SEV-3 Incidents, 29 were attributed to single node failures.
Details of severity level 1 incidents
| ID | Date | Description | Length | Attribution |
| Incident-556 | 13/12/2008 | Service reload after Lustre errors | 03:33 | Cray |
| Incident-586 | 20/12/2008 | Lustre problem caused full service failure | 03:57 | Cray |
| Incident-601 | 22/12/2008 | Lustre problem caused full service failure | 02:08 | Cray |
| Incident-651 | 30/12/2008 | Lustre problem caused full service failure | 01:18 | Cray |
| Incident-656 | 31/12/2008 | Press. unit fails - all chilled water lost | 04:17 | Site |
MTBF and Serviceability
| Attribution | Failures | MTBF | UDT | Serviceability |
| Cray | 4 | 183 | 10:56:00 | 98.5% |
| Site | 1 | 732 | 04:17:00 | 99.4% |
| External | 0 | ∞ | 00:00:00 | 100% |
| Other | 0 | ∞ | 00:00:00 | 100% |
| Overall | 5 | 146 | 15:13:00 | 97.9% |
- 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 |
| RX message header CRC Error | 18 |
| MCA bk0 error (Internal Opteron) | 2 |
| UME bk0/bk4 (Dimms) | 4 |
| "Invalid opcode" error | 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 | 9 December 2008 | 20 | 2 | 0 | 0 | 2 |
| X2 programming, NAG Oxford | 10 - 11 December 2008 | 12 | 2 | 0 | 0 | 2 |
3: Quality tokens
| 15 December 2008 15:33:48 | Dr Richard L Anderson | ***** | |
| 18 December 2008 15:26:16 | Mr Andrea Spitaleri | ***** | I get useful and quick answer to my problems (queue and software optmisation) |
4: Hours worked
| Group | Days worked | FTEs |
| USL | 72.2 | 4.1 |
| OSG | 69 | 3.9 |
5: Performance metrics
Technology Provision
| Description | TSL | FSL | Value |
| Technology reliability | 85% | 98.5% | 98.5% |
| Technology throughput | 7000 hours | 8367 hours | 8258 hours |
| Capability job completion rate | 70% | 90% | 100% |
| Technology MTBF | 100 hours | 126.4 hours | 183 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% |
| Number of SP FTEs | 7.3 | 8.0 | 8.7 | 8.0 |
| SP serviceability | 80% | 99% | 99.5% | 99.4% |
