HECToR Monthly Report, February 2011
Information on the utilisation, disk allocations, slowdowns and helpdesk statistics can be found in the associated SAFE monthly report.
From 1 February 2011, Phase 2b is the contracted service. This report relates to the Phase 2b service only. Performance statistics for the non-contractual Phase 2a system can be found here.
Dates covered: 08:00 1 February 2011 to 08:00 1 March 2011
Number of hours: 672
1: Availability
Scheduled down time: 16 hours 35 minutes.
Incidents
The following incidents were recorded:
Severity | Number |
1 | 2 |
2 | 0 |
3 | 12 |
4 | 0 |
Of the four severity levels, level 1 corresponds to a contractual failure.
Out of the 12 SEV-3 Incidents, 12 were attributed to single node failure events.
Details of severity level 1 incidents
ID | Date | Description | Length | Attribution |
Incident-5776 | 20/02/2011 | All LNET routers down | 00:42 | Cray |
Incident-5806 | 26/02/2011 | esFS failure - no access to /work | 08:26 | Cray |
MTBF and Serviceability
Attribution | Failures | MTBF | UDT | Serviceability |
Cray | 2 | 366 | 09:08 | 98.61% |
Site | 0 | ∞ | 00:00 | 100% |
External | 0 | ∞ | 00:00 | 100% |
Other | 0 | ∞ | 00:00 | 100% |
Overall | 2 | 366 | 09:08 | 98.61% |
- 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 |
Software error - kernel panic/heartbeat error | 2 |
HT lockup | 3 |
MCA bank 4 error (DIMMs) | 3 |
Voltage fault | 1 |
Nodes admin down | 2 |
Nodes cold start | 1 |
2: Courses
This information is supplied by NAG LtdTitle of Course | Dates | Available Places | Ordinary Attendees | Paying Attendees | CSE Staff | Total Attending |
Fortran 95, King's College London | 16 - 18 February 2011 | 50 | 43 | 0 | 1 | 44 |
Advanced Computational Methods II (MSc), University of Southampton | Every Thursday in February (1,8,15,22) 2011 | 20 | 18 | 0 | 0 | 18 |
3: Quality Tokens
Date | Tokens Awarded | Comment | Consortium |
01/02/2011 | * * * * | Four positive tokens. No comment from the user | e05 |
23/02/2011 | * * | Two positive tokens. No comment from the user | e10/e24 |
4: Hours Worked
Group | Days worked | FTEs |
USL | 70.8 | 4.0 |
OSG | 76.7 | 4.3 |
5: Performance Metrics
Technology Provision
Description | TSL | FSL | Value |
Technology reliability | 85% | 98.5% | 98.6% |
Technology throughput | 7000 hours | 8367 hours | 8475 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), where 732 is the 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% | 99.4% |
Number of SP FTEs | 7.3 | 8.0 | 8.7 | 8.3 |
SP Serviceability | 80% | 99% | 99.5% | 100% |