HECToR Monthly Report, December 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 December 2009 to 08:00 1 January 2010
Number of hours: 744
1: Availability
Scheduled down time: 11 hours 40 minutes.
Incidents
The following incidents were recorded:
Severity | Number |
1 | 4 |
2 | 1 |
3 | 18 |
4 | 0 |
Of the four severity levels, level 1 corresponds to a contractual failure.
Out of the 18 SEV-3 Incidents, 18 were attributed to single node failures. 1 SEV-2 incident was attributed to 350 nodes being taken down proactively due to an application-related error.
Details of severity level 1 incidents
ID | Date | Description | Length | Attribution |
Incident-2622 | 01/12/2009 | OST problem - system locked and died | 02:57 | Cray |
Incident-2692 | 15/12/2009 | Voltage fault on module c10-2c0s5 | 01:23 | Cray |
Incident-2697 | 16/12/2009 | Maintenance overrun due to defective UPS(See Note Below) | 44:39 | Site |
Incident-2742 | 29/12/2009 | Power lost to 2 DDN racks | 03:44 | Cray |
MTBF and Serviceability
Attribution | Failures | MTBF | UDT | Serviceability |
Cray | 3 | 244 | 08:04:00 | 98.9% |
Site | 1 | 732 | 44:39:00 | 93.9% |
External | 0 | ∞ | 00:00:00 | 100% |
Other | 0 | ∞ | 00:00:00 | 100% |
Overall | 4 | 183 | 52:43:00 | 92.8% |
- 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 single node failures
Error Type | Number |
UME bk4 (Dimms) | 1 |
UME bk 0-4 (Internal Opteron) | 1 |
RX message header CRC Error | 13 |
RX packet sequence number error | 3 |
2: Courses
This information is supplied by NAG LtdThere were no training courses in December.
3: Quality Tokens
Date | Tokens Awarded | Comment | Consortium |
04-Dec-2009 09:35:12 | • | Quite a lot of downtime and the 12 hr limit is starting to hinder things a little! | e05 |
08-Dec-2009 15:22:40 | * * * * | Positive tokens, no user comments | x01, HPC-Europa |
17-Dec-2009 11:45:50 | • • • • • | The availability of the HECToR service has been very poor this year and now to have such a long downtime during the academic holidays is unacceptable. | n02 |
18-Dec-2009 09:23:03 | • • • • | Negative tokens, no user comments | n02 |
18-Dec-2009 12:10:23 | • • • • • | It goes withput saying that the interruption to service in Dec. 2009 has been extremely disruptive. |The lack of communication regarding progress in solving the problem is also disappointing. | n02 |
4: Hours Worked
Group | Days worked | FTEs |
USL | 69.0 | 3.9 |
OSG | 80.5 | 4.5 |
5: Performance Metrics
Technology Provision
Description | TSL | FSL | Value |
Technology reliability | 85% | 98.5% | 98.9% |
Technology throughput | 7000 hours | 8367 hours | 8012 hours |
Capability job completion rate | 70% | 90% | 100% |
Technology MTBF | 100 hours | 126.4 hours | 244 |
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 | 8.4 |
SP Serviceability | 80% | 99% | 99.5% | 93.9% |