HECToR Monthly Report, May 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 May 2009 to 08:00 1 June 2009
Number of hours: 744
1: Availability
Scheduled down time: 15.4 hours.
Incidents
The following incidents were recorded:
| Severity | Number |
| 1 | 2 |
| 2 | 2 |
| 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 failures.
Details of severity level 1 incidents
| ID | Date | Description | Length | Attribution |
| Incident-1406 | 03/05/2009 | Failure of IO riser to OST15 | 08:16 | Cray |
| Incident-1506 | 20/05/2009 | Maintenance session over-run | 00:23 | Cray |
MTBF and Serviceability
| Attribution | Failures | MTBF | UDT | Serviceability |
| Cray | 2 | 366 | 08:39:00 | 98.8% |
| Site | 0 | ∞ | 00:00:00 | 100% |
| External | 0 | ∞ | 00:00:00 | 100% |
| Other | 0 | ∞ | 00:00:00 | 100% |
| Overall | 2 | 366 | 08:39:00 | 98.8% |
- 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 | 9 |
| MCA bk0/bk2 error (Internal Opteron) | 3 |
| UME bk0/bk4 (Dimms) | 3 |
| Coldstart error (node failing to restart after reboot) | 4 |
| Heartbeat error | 2 |
| Software problem | 2 |
Note: During "coldstart" errors, no user jobs were affected.
2: Courses
This information is supplied by NAG Ltd| Title of Course | Dates | Available places | Ordinary attendees | Paying attendees | CSE Staff | Total attending |
| Tools and Techniques for Optimising Parallel Codes, NAG Manchester | 13 - 15 May 2009 | 8 | 4 | 0 | 1 | 5 |
| Introduction to High Performance Computing, University of Warwick | 18 - 19 May 2009 | 25 | 14 | 0 | 0 | 14 |
3: Quality tokens
None set this month.4: Hours worked
| Group | Days worked | FTEs |
| USL | 79.6 | 4.5 |
| OSG | 78.5 | 4.4 |
5: Performance metrics
Technology Provision
| Description | TSL | FSL | Value |
| Technology reliability | 85% | 98.5% | 98.8% |
| Technology throughput | 7000 hours | 8367 hours | 8495 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% | 99.0% |
| Number of SP FTEs | 7.3 | 8.0 | 8.7 | 8.9 |
| SP serviceability | 80% | 99% | 99.5% | 100% |
