HECToR Monthly Report, September 2010
Information on the utilisation, disk allocations, slowdowns and helpdesk statistics can be found in the associated SAFE monthly report.
This report relates to the Phase 2a service only. Performance statistics for the non-contractual Phase 2b system can be found here.
Dates covered: 08:00 1 September 2010 to 08:00 1 October 2010
Number of hours: 720
1: Availability
Scheduled down time: 11 hours 25 minutes
Incidents
The following incidents were recorded:
| Severity | Number |
| 1 | 2 |
| 2 | 0 |
| 3 | 23 |
| 4 | 0 |
Of the four severity levels, level 1 corresponds to a contractual failure.
Out of the 23 SEV-3 Incidents, 23 were attributed to single node failure events.
Details of severity level 1 incidents
| ID | Date | Description | Length | Attribution |
| Incident-4466 | 07/09/2010 | Blue Arc failure hung /home filesystem | 01:00 | Cray |
| Incident-4526 | 16/09/2010 | Shutdown due to security vulnerability | 27:23 | External |
MTBF and Serviceability
| Attribution | Failures | MTBF | UDT | Serviceability |
| Cray | 1 | 732 | 01:00 | 99.9% |
| Site | 0 | ∞ | 00:00 | 100% |
| External | 1 | 732 | 27:23 | 96.1% |
| Other | 0 | ∞ | 00:00 | 100% |
| Overall | 2 | 366 | 28:23 | 96.0% |
- 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 | 5 |
| RX message CRC Error | 2 |
| RX packet sequence number error | 5 |
| MCA bk0-bk4 error | 5 |
| Software/application related error | 3 |
| Heartbeat error | 1 |
| Node(s) admin down | 2 |
2: Courses
This information is supplied by NAG Ltd| Title of Course | Dates | Available Places | Ordinary Attendees | Paying Attendees | CSE Staff | Total Attending |
| Parallel Programming with MPI, University of Leeds | 6-9 September 2010 | 30 | 25 | 1 | 0 | 26 |
| Introduction to HECToR, NAG Oxford | 6 September 2010 | 20 | 1 | 0 | 0 | 1 |
| Debugging, Profiling and Optimisation, NAG Oxford | 7-8 September 2010 | 20 | 6 | 0 | 0 | 6 |
| OpenMP, University of Leeds | 9-10 September 2010 | 30 | 16 | 0 | 0 | 16 |
| Multicore, NAG Oxford | 9 September 2010 | 20 | 8 | 0 | 0 | 8 |
| Programming the X2 Vector System, NAG Manchester | 13-14 September 2010 | 20 | 1 | 0 | 0 | 1 |
| Introduction to HECToR, NAG Manchester | 20 September 2010 | 20 | 9 | 0 | 0 | 9 |
| Debugging, Profiling and Optimising, NAG Manchester | 21-22 September 2010 | 20 | 4 | 0 | 1 | 5 |
| Multicore, NAG Manchester | 23 September 2010 | 20 | 7 | 0 | 0 | 7 |
| Core Algorithms for High Performance Scientific Computing, University of Warwick | 27 September - 1 October 2010 | 30 | 26 | 0 | 2 | 28 |
3: Quality Tokens
| Date | Tokens Awarded | Comment | Consortium |
| 08-Sep-2010 11:43:24 | * * * * * | Positive feedback; no comment from the user | e89 |
4: Hours Worked
| Group | Days worked | FTEs |
| USL | 78.5 | 4.4 |
| OSG | 83.1 | 4.7 |
5: Performance Metrics
Technology Provision
| Description | TSL | FSL | Value |
| Technology reliability | 85% | 98.5% | 99.9% |
| Technology throughput | 7000 hours | 8367 hours | 8306 hours |
| Capability job completion rate | 70% | 90% | 96.7% |
| Technology MTBF | 100 hours | 126.4 hours | 732 |
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% | 97.7% |
| Number of SP FTEs | 7.3 | 8.0 | 8.7 | 9.1 |
| SP Serviceability | 80% | 99% | 99.5% | 100% |
