HECToR Monthly Report, May 2010
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 2010 to 08:00 1 June 2010
Number of hours: 744
1: Availability
Scheduled down time: 22 hours 48 minutes.
Incidents
The following incidents were recorded:
| Severity | Number |
| 1 | 5 |
| 2 | 2 |
| 3 | 26 |
| 4 | 0 |
Of the four severity levels, level 1 corresponds to a contractual failure.
Out of the 26 SEV-3 Incidents, 26 were attributed to single node failure events.
Details of severity level 1 incidents
| ID | Date | Description | Length | Attribution |
| Incident-3431 | 02/05/2010 | Cabinet emergency power down due to a power supply failure | 04:54 | Cray |
| Incident-3491 | 10/05/2010 | Link inactive. Two modules replaced. | 01:39 | Cray |
| Incident-3566 | 18/05/2010 | Link inactive. Two modules replaced. | 00:59 | Cray |
| Incident-3601 | 26/05/2010 | Unplanned shutdown immediately prior to maintenance. User error executing script. | 00:05 | Cray |
| Incident-3631 | 31/05/2010 | High speed network congestion. External lustre image removed. | 02:12 | Cray |
MTBF and Serviceability
| Attribution | Failures | MTBF | UDT | Serviceability |
| Cray | 5 | 146 | 09:49:00 | 98.6% |
| Site | 0 | ∞ | 00:00:00 | 100% |
| External | 0 | ∞ | 00:00:00 | 100% |
| Other | 0 | ∞ | 00:00:00 | 100% |
| Overall | 5 | 146 | 09:49:00 | 98.6% |
- 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 | 12 |
| RX message CRC Error | 7 |
| RX packet sequence number error | 1 |
| MCA bk0 error (internal Opteron cache error) | 2 |
| UME bk4 (bk0 DIMMS) | 2 |
| Software/application related error | 1 |
| Heartbeat error | 1 |
2: Courses
This information is supplied by NAG Ltd| Title of Course | Dates | Available Places | Ordinary Attendees | Paying Attendees | CSE Staff | Total Attending |
| Exploiting Parallel CASTEP on Large-scale HPC, NAG Manchester | 17-18 May 2010 | 20 | 11 | 0 | 2 | 13 |
| Parallel IO, NAG Oxford | 19 May 2010 | 12 | 2 | 0 | 2 | 4 |
| Advanced Computational Methods, University of Southampton | Every Thursday in May (6,13,20,27) | 20 | 9 MSc students (i.e. those being assessed) + 5 other attendees | 0 | 0 | 14 (The numbers vary a bit from week to week) |
3: Quality Tokens
| Date | Tokens Awarded | Comment | Consortium |
| 11-May-2010 11:12:17 | • • | Que time is far too long as accounting is off! | e05 |
| 11-May-2010 11:13:35 | • • • | Jobs are taking too long to go on, whilst accounting is switched off!! | e05 |
| 27-May-2010 08:47:09 | • • • • • | Amount of queuing time ridiculous | n02 |
4: Hours Worked
| Group | Days worked | FTEs |
| USL | 100.3 | 5.65 |
| OSG | 83.1 | 4.61 |
5: Performance Metrics
Technology Provision
| Description | TSL | FSL | Value |
| Technology reliability | 85% | 98.5% | 98.6% |
| Technology throughput | 7000 hours | 8367 hours | 8393 hours |
| Capability job completion rate | 70% | 90% | 94.3 |
| Technology MTBF | 100 hours | 126.4 hours | 146 |
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% | 98.5% |
| Number of SP FTEs | 7.3 | 8.0 | 8.7 | 10.3 |
| SP Serviceability | 80% | 99% | 99.5% | 100% |
