HECToR Monthly Report, September 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 September 2009 to 08:00 1 October 2009
Number of hours: 720
1: Availability
Scheduled down time: 11 hours 30 minutes.
Incidents
The following incidents were recorded:
| Severity | Number |
| 1 | 5 |
| 2 | 2 |
| 3 | 21 |
| 4 | 0 |
Of the four severity levels, level 1 corresponds to a contractual failure.
Out of the 21 SEV-3 Incidents, 21 were attributed to single node failures.
Details of severity level 1 incidents
| ID | Date | Description | Length | Attribution |
| Incident-2232 | 07/09/2009 | Close for security alert | 28:05 | External* |
| Incident-2262 | 11/09/2009 | High speed network failure | 02:19 | Cray |
| Incident-2297 | 23/08/2009 | Link Inactive error | 02:45 | Cray |
| Incident-2367 | 28/09/2009 | Services unavailable - filesystem full | 02:24 | OSG |
| Incident-2392 | 30/09/2009 | Shutdown due to risk of loss of cooling | 01:45 | OSG/External** |
* An external unix security alert resulted in the service being closed. This was a preventative measure and there was no breach of HECToR security.
** A fault on the external power distribution network triggered a plant fault.
MTBF and Serviceability
| Attribution | Failures | MTBF | UDT | Serviceability |
| Cray | 2 | 366 | 05:04:00 | 99.3% |
| Site | 1.5 | 488 | 03:16:00 | 99.5% |
| External | 1.5 | 488 | 28:57:00 | 95.9% |
| Other | 0 | ∞ | 00:00:00 | 100% |
| Overall | 5 | 146 | 37:18:00 | 94.7% |
- 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 |
| UME bk0/bk4 (Dimms) | 6 |
| UME on MDC2 (X2 node failure) | 1 |
| RX message header CRC Error | 11 |
| MCA bk0 error (internal Opteron) | 1 |
| Heartbeat 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 |
| Fortran 95, University of Exeter | 7 - 9 September 2009 | 30 | 11 | 1 | 0 | 12 |
| Parallel Programming with MPI, University of Exeter | 14 - 16 September 2009 | 30 | 24 | 1 | 0 | 25 |
| Introduction to HECToR, University of Exeter | 21 September 2009 | 30 | 5 | 0 | 0 | 5 |
| OpenMP and Mixed Mode Programming, University of Exeter | 22 - 23 September 2009 | 30 | 17 | 0 | 0 | 17 |
| Core Algorithms for High Performance Scientific Computing, University of Warwick | 28 September - 2 October 2009 | 30 | 29 | 0 | 0 | 29 |
3: Quality Tokens
| Date | Tokens Awarded | Comment |
| 30-Sep-2009 21:56:26 | * * * * * | Positive feedback from e63 consortium |
4: Hours Worked
| Group | Days worked | FTEs |
| USL | 87.6 | 4.94 |
| OSG | 77.17 | 4.35 |
5: Performance Metrics
Technology Provision
| Description | TSL | FSL | Value |
| Technology reliability | 85% | 98.5% | 99.3% |
| Technology throughput | 7000 hours | 8367 hours | 8198 hours |
| Capability job completion rate | 70% | 90% | 100% |
| Technology MTBF | 100 hours | 126.4 hours | 366 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% | 98.3% |
| Number of SP FTEs | 7.3 | 8.0 | 8.7 | 9.3 |
| SP Serviceability | 80% | 99% | 99.5% | 99.4% |
