HECToR Monthly Report, January 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 January 2009 to 08:00 1 February 2009
Number of hours: 744
1: Availability
Scheduled down time: 10 hours.
Incidents
The following incidents were recorded:
| Severity | Number |
| 1 | 5 |
| 2 | 3 |
| 3 | 23 |
| 4 | 1 |
Of the four severity levels, level 1 corresponds to a contractual failure.
Out of the 23 SEV-3 Incidents, 19 were attributed to single node failures.
Details of severity level 1 incidents
| ID | Date | Description | Length | Attribution |
| Incident-711 | 12/01/2009 | Link Inactive c17-1c1s0s0l4 c15-1c1s0s0l1 | 04:56 | Cray |
| Incident-716 | 13/01/2009 | Voltage fault on c7-1c0s0n1 causing link failure | 01:20 | Cray |
| Incident-751 | 16/01/2009 | WWW/Helpdesk Unavailable | 04:16 | Site |
| Incident-801 | 22/01/2009 | SDB node hung requiring system reload | 04:08 | Cray |
| Incident-831 | 29/01/2009 | Link Inactive c12-1c2s0s1l5 c12-1c2s0s0l0 | 01:22 | Cray |
MTBF and Serviceability
| Attribution | Failures | MTBF | UDT | Serviceability |
| Cray | 4 | 183 | 11:46:00 | 98.4% |
| Site | 1 | 732 | 04:16:00 | 99.4% |
| External | 0 | ∞ | 00:00:00 | 100% |
| Other | 0 | ∞ | 00:00:00 | 100% |
| Overall | 5 | 146 | 16:02:00 | 97.8% |
- 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 | 8 |
| MCA bk0 error (Internal Opteron) | 5 |
| UME bk0/bk4 (Dimms) | 3 |
| s/w problem "general protection fault" | 2 (1 single node, 1 double node) |
The software problems related to a Casino job. This had not been seen before.
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, Imperial College London | 5 - 7 January 2009 | 16 | 13 | 0 | 0 | 13 |
| OpenMP and Mixed-Mode Programming, Imperial College London | 8 - 9 January 2009 | 16 | 12 | 0 | 0 | 12 |
3: Quality tokens
None set this month.4: Hours worked
| Group | Days worked | FTEs |
| USL | 71.1 | 4.0 |
| OSG | 74.0 | 4.2 |
5: Performance metrics
Technology Provision
| Description | TSL | FSL | Value |
| Technology reliability | 85% | 98.5% | 97.8% |
| Technology throughput | 7000 hours | 8367 hours | 8472 hours |
| Capability job completion rate | 70% | 90% | N/A (*) |
| Technology MTBF | 100 hours | 126.4 hours | 146 hours |
(*) No Capability jobs (as per the contract definition) ran in January
There were 2 jobs which ran using more than 2265 cores.
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 | 8.2 |
| SP serviceability | 80% | 99% | 99.5% | 100% |
