HECToR Monthly Report, October 2010

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 2a service only. Performance statistics for the non-contractual Phase 2b system can be found here.

Dates covered: 08:00 1 October 2010 to 08:00 1 November 2010
Number of hours: 744

1: Availability

Scheduled down time: 243 hours 40 minutes. This includes an extended downtime for extensive Phase 2a testing, from 15 October 2010 to 26 October 2010, in preparation for the esFS upgrade.

Incidents

The following incidents were recorded:

SeverityNumber
13
20
312
40

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-4896 23/10/2010 Closedown due to security vulnerability 60:00 Cray
Incident-4911 26/10/2010 OSS node failure 01:31 Cray
Incident-4931 27/10/2010 PBS restarted in error 00:29 Cray

MTBF and Serviceability

AttributionFailuresMTBFUDTServiceability
Cray324462:0087.6%
Site000:00100%
External000:00100%
Other000:00100%
Overall324462:0087.6%
  • 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
RX message header CRC Error 9
RX message CRC Error 1
Software error - kernel panic 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
Debugging with DDT, NAG Manchester 18 October 2010 20 3 0 8 11
Fortran 95, University of Warwick 18-20 October 2010 20 14 0 0 14
DL_POLY, NAG Manchester 20-21 October 2010 20 19 1 0 20
Scientific Visualisation, University of Reading 28 October 2010 20 17 0 0 17

3: Quality Tokens

Date Tokens Awarded Comment Consortium
05-Oct-2010 12:33:21 One negative token; no comment from the user e82

4: Hours Worked

GroupDays workedFTEs
USL69.53.9
OSG74.8 4.2

5: Performance Metrics

Technology Provision

Description TSL FSL Value
Technology reliability 85% 98.5% 87.6%
Technology throughput 7000 hours 8367 hours 5116 hours
Capability job completion rate 70% 90% 94.3%
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% 99.3%
Number of SP FTEs 7.3 8.0 8.7 8.1
SP Serviceability 80% 99% 99.5% 100%