HECToR Monthly Report, February 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 February 2009 to 08:00 1 March 2009
Number of hours: 672
1: Availability
Scheduled down time: 15.8 hours.
Incidents
The following incidents were recorded:
| Severity | Number |
| 1 | 6 |
| 2 | 0 |
| 3 | 25 |
| 4 | 1 |
Of the four severity levels, level 1 corresponds to a contractual failure.
Out of the 25 SEV-3 Incidents, 24 were attributed to single node failures.
Details of severity level 1 incidents
| ID | Date | Description | Length | Attribution |
| Incident-856 | 03/02/2009 | Suspected blower failure in cab 0-0 | 01:32 | Cray |
| Incident-891 | 09/02/2009 | System failure after SMW reboot | 02:13 | Cray |
| Incident-916 | 10/02/2009 | Lustre problems cause service collapse | 03:50 | Cray |
| Incident-946 | 16/02/2009 | Voltage vault on module takes out HSN | 03:12 | Cray |
| Incident-1001 | 25/02/2009 | Link inactive error - HSN collapses | 03:22 | Cray |
| Incident-1011 | 26/02/2009 | Plant problems | 09:41 | Site |
MTBF and Serviceability
| Attribution | Failures | MTBF | UDT | Serviceability |
| Cray | 5 | 146 | 14:09:00 | 97.8% |
| Site | 1 | 732 | 09:41:00 | 98.5% |
| External | 0 | ∞ | 00:00:00 | 100% |
| Other | 0 | ∞ | 00:00:00 | 100% |
| Overall | 6 | 122 | 23:50:00 | 96.4% |
- 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 | 7 |
| MCA bk0/bk2 error (Internal Opteron) | 5 |
| UME bk0/bk4 (Dimms) | 7 |
| Heartbeat error | 2 |
| 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 |
| Introduction to HECToR, NAG Oxford | 5 February 2009 | 12 | 1 | 0 | 1 | 2 |
| Tools and Techniques for Optimising Parallel Codes, NAG Oxford | 9 - 11 February 2009 | 12 | 3 | 0 | 3 | 6 |
| Fortran 95, NAG Manchester | 24 - 26 February 2009 | 30 | 15 | 0 | 0 | 15 |
3: Quality tokens
| Date | Token | Comment |
| 02-Feb-2009 10:52:56 | ***** | Excellent dedicated team. Very professional and expert service. |
| 09-Feb-2009 10:01:48 | • • • • • | I have noticed that Hector has been down every 4-7 days since Christmas. This poor service is exacerbated by fortnightly maintainance sessions, planned to take place during peak user hours - who thought of that! The service has been detrimental to my work |
| 14-Feb-2009 00:13:38 | ***** | |
| 17-Feb-2009 22:36:10 | ***** | The support team of Hector is really good. |
| 26-Feb-2009 10:12:12 | • • • • • | Hector seems to be even less reliable than before! I noted Hector was down at 6pm yesterday, 8pm yesterday, still down at 8am this morning and now we are told it may be another 6 hours before service is restored. Could engineers be called in earlier? |
4: Hours worked
| Group | Days worked | FTEs |
| USL | 71.5 | 4.0 |
| OSG | 73.9 | 4.2 |
5: Performance metrics
Technology Provision
| Description | TSL | FSL | Value |
| Technology reliability | 85% | 98.5% | 97.8% |
| Technology throughput | 7000 hours | 8367 hours | 8309 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% | 100% |
| Number of SP FTEs | 7.3 | 8.0 | 8.7 | 8.2 |
| SP serviceability | 80% | 99% | 99.5% | 98.5% |
