The HECToR Service is now closed and has been superceded by ARCHER.

HECToR Monthly Report, July 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 July 2010 to 08:00 1 August 2010
Number of hours: 744

1: Availability

Scheduled down time: 10 hours 04 minutes.


The following incidents were recorded:


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

Out of the 13 SEV-3 Incidents, 13 were attributed to single node failure events.

Details of severity level 1 incidents

ID Date Description Length Attribution
Incident-4016 07/07/2010 Storage Rack Power Supply Tripped 01:46 Cray
Incident-4126 23/07/2010 Cabinet Power Supply Failure 01:45 Cray
Incident-4196 31/07/2010 Link Inactive 01:20 Cray

MTBF and Serviceability

  • 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 5
RX message CRC Error 2
RX packet sequence number error 3
Software/application related error 2
Node admin down 1

2: Courses

This information is supplied by NAG Ltd

There were no courses in July.

3: Quality Tokens

No tokens were set in July.

4: Hours Worked

GroupDays workedFTEs
OSG85.3 4.5

5: Performance Metrics

Technology Provision

Description TSL FSL Value
Technology reliability 85% 98.5% 99.3%
Technology throughput 7000 hours 8367 hours 8601 hours
Capability job completion rate 70% 90% 97.7%
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 9.0
SP Serviceability 80% 99% 99.5% 100%