HECToR Monthly Report, January 2012
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 2011 to 08:00 1 January 2012
Number of hours: 744
1: Availability
Scheduled down time: 60 hours 37 minutes. This includes extended maintenance
required for the Phase 3 upgrade and acceptance testing.
Incidents
The following incidents were recorded:
| Severity | Number |
| 1 | 3 |
| 2 | 0 |
| 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 node failure events.
Details of severity level 1 incidents
| ID | Date | Description | Length | Attribution |
| Incident-7141 | 18/01/2012 | Maintenance overrun | 01:15 | Cray |
| Incident-7176 | 24/01/2012 | System hung after "warmswap" problem | 09:01 | Cray |
| Incident-7186 | 27/01/2012 | Acceptance tests overrun | 23:32 | Cray |
MTBF and Serviceability
| Attribution | Failures | MTBF | UDT | Serviceability |
| Cray | 3 | 244 | 33:48 | 95.1% |
| Site | 0 | ∞ | 00:00 | 100.0% |
| External | 0 | ∞ | 00:00 | 100.0% |
| Other/Unknown | 0 | ∞ | 00:00 | 100.0% |
| Overall | 3 | 244 | 33:48 | 95.1% |
- 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 |
| MCA bank 4 error | 10 |
| HT lockup error | 3 |
| Module voltage fault | 3 |
| Software error - kernel panic | 3 |
| Thermtrip on Opteron processor (Failed during acceptance testing)(*) | 1 |
| Admindown by Node Health Check script(*) | 1 |
(*) No user job lost
2: Courses
This information is supplied by NAG Ltd| Title of Course | Dates | Available Places | Ordinary Attendees | Paying Attendees | CSE Staff | Total Attending |
| OpenMP, Imperial College | 5-6 January 2012 | 45 | 10 | 0 | 0 | 10 |
| Parallel Programming with MPI, Imperial College | 9 - 11 January 2012 | 45 | 19 | 1 | 0 | 19 |
| An Introduction to CUDA Programming, University of Leicester | 24 - 25 January 2012 | 25 | 10 | 6 | 0 | 16 |
5: Performance Metrics
Technology Provision
| Description | TSL | FSL | Value |
| Technology reliability | 85% | 98.5% | 95.1% |
| Technology throughput | 7000 hours | 8367 hours | 7651 hours |
| Capability job completion rate | 70% | 90% | 93.3% |
| Technology MTBF | 100 hours | 126.4 hours | 732 |
Note: Technology throughput is calculated: 12*(732-UDT-SDT), where 732 is the 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% | 99.4% |
| Number of SP FTEs | 7.3 | 8.0 | 8.7 | 8.8 |
| SP Serviceability | 80% | 99% | 99.5% | 100% |
