HECToR Monthly Report, March 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 March 2009 to 08:00 1 April 2009
Number of hours: 744
1: Availability
Scheduled down time: 17.5 hours.
Incidents
The following incidents were recorded:
| Severity | Number |
| 1 | 5 |
| 2 | 0 |
| 3 | 25 |
| 4 | 0 |
Of the four severity levels, level 1 corresponds to a contractual failure.
Out of the 25 SEV-3 Incidents, 25 were attributed to single node failures.
Details of severity level 1 incidents
| ID | Date | Description | Length | Attribution |
| Incident-1066 | 04/03/2009 | OST21 failure provoked lustre failure | 02:16 | Cray |
| Incident-1126 | 17/03/2009 | Link inactive failure | 02:07 | Cray |
| Incident-1151 | 19/03/2009 | Hardware failure on OST11 | 03:29 | Cray |
| Incident-1181 | 24/03/2009 | Link Inactive c5-2c1s4s1l3 c5-2c1s3s1l2 | 02:48 | Cray |
| Incident-1201 | 25/03/2009 | Link inactive failure | 01:03 | Cray |
MTBF and Serviceability
| Attribution | Failures | MTBF | UDT | Serviceability |
| Cray | 5 | 146 | 11:43:00 | 98.4% |
| Site | 0 | ∞ | 00:00:00 | 100% |
| External | 0 | ∞ | 00:00:00 | 100% |
| Other | 0 | ∞ | 00:00:00 | 100% |
| Overall | 5 | 146 | 11:43:00 | 98.4% |
- 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 | 12 |
| MCA bk0/bk2 error (Internal Opteron) | 5 |
| UME bk0/bk4 (Dimms) | 4 |
| Heartbeat error | 1 |
| Coldstart error (node failing to start after reboot) | 3 |
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 Southampton | 23 - 25 March 2009 | 40 | 21 | 0 | 0 | 21 |
| Parallel Processing with MPI, University of Bristol | 23 - 25 March 2009 | 28 | 26 | 0 | 0 | 26 |
| Parallel Processing with MPI, University of Southampton | 30 March - 1 April 2009 | 40 | 28 | 0 | 0 | 28 |
3: Quality tokens
| Date | Token | Comment |
| 16-Mar-2009 15:22:58 | **** | Positive feedback from e70 project, no comment received |
4: Hours worked
| Group | Days worked | FTEs |
| USL | 71.6 | 4.0 |
| OSG | 72.8 | 4.1 |
5: Performance metrics
Technology Provision
| Description | TSL | FSL | Value |
| Technology reliability | 85% | 98.5% | 98.4% |
| Technology throughput | 7000 hours | 8367 hours | 8433 hours |
| Capability job completion rate | 70% | 90% | 100% |
| Technology MTBF | 100 hours | 126.4 hours | 146 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% | 99.7% |
| Number of SP FTEs | 7.3 | 8.0 | 8.7 | 8.1 |
| SP serviceability | 80% | 99% | 99.5% | 100% |
