HECToR Monthly Report, April 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 April 2010 to 08:00 1 May 2010
Number of hours: 720
1: Availability
Scheduled down time: 15 hours 00 minutes.
Incidents
The following incidents were recorded:
| Severity | Number |
| 1 | 10 |
| 2 | 4 |
| 3 | 14 |
| 4 | 0 |
Of the four severity levels, level 1 corresponds to a contractual failure.
Out of the 14 SEV-3 Incidents, 14 were attributed to single node failure events.
Details of severity level 1 incidents
| ID | Date | Description | Length | Attribution |
| Incident-3306 | 07/04/2010 | SAFE and Website Unavailable | 00:43 | Cray |
| Incident-3316 | 08/04/2010 | Maintenance overrun | 04:07 | Cray |
| Incident-3311 | 09/04/2010 | Link Inactive | 01:58 | Cray |
| Incident-3331 | 10/04/2010 | Cabinet PDU failure | 19:35 | Cray |
| Incident-3346 | 14/04/2010 | Maintenance session overrun | 00:53 | Cray |
| Incident-3356 | 15/04/2010 | Voltage Fault on Node | 02:30 | Cray |
| Incident-3361 | 17/04/2010 | Cabinet Sensor Failure | 16:32 | Cray |
| Incident-3371 | 20/04/2010 | Emergency maintenance - System restart | 02:39 | Cray |
| Incident-3416 | 26/04/2010 | Emergency maintenance - Revert esfs software change | 01:30 | Cray |
| Incident-3421 | 26/04/2010 | Emergency maint - Job Slowdown Analysis and Testing | 84:32 | Cray |
MTBF and Serviceability
| Attribution | Failures | MTBF | UDT | Serviceability |
| Cray | 10 | 73 | 134:59:00 | 80.9% |
| Site | 0 | ∞ | 00:00:00 | 100% |
| External | 0 | ∞ | 00:00:00 | 100% |
| Other | 0 | ∞ | 00:00:00 | 100% |
| Overall | 10 | 73 | 134:59:00 | 80.9% |
- 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 | 5 |
| RX message CRC Error | 2 |
| RX packet sequence number error | 5 |
| 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 |
| Parallel Programming with MPI, University of Nottingham | 12 - 14 April 2010 | 30 | 19 | 0 | 0 | 19 |
| OpenMP, University of Nottingham | 15 - 16 April 2010 | 30 | 11 | 0 | 0 | 11 |
| Best Practice in HPC Software Development, Imperial College, London | 12 - 16 April 2010 | 30 | 9 | 0 | 0 | 9 |
| Advanced Computational Methods, University of Southampton | Every Thursday in April (1,8,15,22,29) | 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 |
| 08-Apr-2010 09:01:28 | • • • • • | Hector just crashed. Please see note (*) | n02 |
| 23-Apr-2010 14:42:00 | • • • | No user comment | n02 |
| 26-Apr-2010 22:15:41 | • • • | Using the users to beta test a new form of the file system is poor, and a waste of resource | n02 |
4: Hours Worked
| Group | Days worked | FTEs |
| USL | 79.4 | 4.47 |
| OSG | 73.3 | 4.12 |
5: Performance Metrics
Technology Provision
| Description | TSL | FSL | Value |
| Technology reliability | 85% | 98.5% | 80.9% |
| Technology throughput | 7000 hours | 8367 hours | 6984.2 hours |
| Capability job completion rate | 70% | 90% | 97.4 |
| Technology MTBF | 100 hours | 126.4 hours | 73 |
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% | 98.7% |
| Number of SP FTEs | 7.3 | 8.0 | 8.7 | 8.6 |
| SP Serviceability | 80% | 99% | 99.5% | 100% |
