HECToR Monthly Report, May 2011

Information on the utilisation, disk allocations, slowdowns and helpdesk statistics can be found in the associated SAFE monthly report.

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 May 2011 to 08:00 1 June 2011
Number of hours: 744

1: Availability

Scheduled down time: 10 hours 51 minutes.

Incidents

The following incidents were recorded:

SeverityNumber
12
20
346
40

Of the four severity levels, level 1 corresponds to a contractual failure.

Out of the 46 SEV-3 Incidents, 46 were attributed to node failure events.

Details of severity level 1 incidents

ID Date Description Length Attribution
Incident-6326 12/05/2011 esFS problem 06:38 Cray
Incident-6516 30/05/2011 External power failure 25:33 External

MTBF and Serviceability

AttributionFailuresMTBFUDTServiceability
Cray173206:3899.1%
Site000:00100%
External1 732 25:3396.5%
Other000:00100%
Overall236632:1195.6%
  • 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
Software error (bug #771936) 18 (6 occurred during testing)
Software error (bug #764343) 13 (2 occurred during testing)
Software error (bug #770935) 8
HT lockup 1
MCA bank 1/ bank 4 error 6

2: Courses

This information is supplied by NAG Ltd
Title of Course Dates Available Places Ordinary Attendees Paying Attendees CSE Staff Total Attending
OpenMP, University College London 10-11 May 2011 12 12 0 0 12
An Introduction to CUDA Programming, NAG Oxford 23-24 May 2011 14 12 1 0 13
OpenMP, University of Bath 24-25 May 2011 32 11 0 0 11
An Introduction to OpenCL Programming, NAG Oxford 25-26 May 2011 14 12 0 0 12
Advanced Computational Methods II (MSc), University of Southampton Three Tuesdays in May 2011 20 20 0 0 20

3: Quality Tokens

Date Tokens Awarded Comment Consortium
05/05/2011 * * * * * Five positive tokens. No comment from the user e05

4: Hours Worked

GroupDays workedFTEs
USL98.75.6
OSG79.74.5

5: Performance Metrics

Technology Provision

Description TSL FSL Value
Technology reliability 85% 98.5% 99.1%
Technology throughput 7000 hours 8367 hours 8267 hours
Capability job completion rate 70% 90% 100%
Technology MTBF 100 hours 126.4 hours 732

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% 99.6%
Number of SP FTEs 7.3 8.0 8.7 10.1
SP Serviceability 80% 99% 99.5% 100%