The HECToR Service is now closed and has been superceded by ARCHER.

HECToR Monthly Report, September 2007

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

Dates covered: 08:00 1 September 2007 to 08:00 1 October 2007
Number of hours: 720

1: Availability

System: TDS

Scheduled down time: 52 hours


The following incidents were recorded starting from 22 September 2007:


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

Details of severity level 1 incidents

24/9/2007System down due to flooding event still under investigation8:12Cray
25/9/2007A power problem at Appleton Tower adversely affected the SRIF network such that connectivity to/from the system was intermittent and active network connections lost1:13OSG
28/9/2007A critical security issue that required a software patch to be obtained from Cray and be subsequently applied and tested.72:00Other

MTBF and Serviceability

  • Note 1: Serviceability%= 100*(WCT-SDT-UDT)/(WCT-SDT)
  • Note 2: WCT (Wall Clock Time) for this calculation is counted starting from 00:00 hours on 22 September 2007, with the total of 216 hours.
  • Note 3: MTBF (Mean Time Between Failures) is defined as 732/Number of failures. This formula does not make an allowance for a shorter month.

2: Courses

This information is supplied by NAG Ltd

Title of CourseStart dateLength (Days)Place daysHECToR User DaysHECToR Staff Days
Getting Ready for HECToR19/9/200711558

3: Quality tokens

No quality tokens were set by users in the last three months.

4: Hours worked

GroupDays workedFTEs

5: Performance metrics

Technology Provision

Description TSL FSL Value
Technology reliability 85% 98.50% 95%
Technology throughput 7000 hours 8367 hours N/A
Capability job completion rate 70% 90% N/A
Technology MTBF 100 hours 126.4 hours 732

Service Provision

Description TSL FSL USL Value
Percentage of non-in-depth
queries resolved within one day
85% 97% 99% 95%
Number of SP FTEs 7.3 8.0 8.7 8.9
SP serviceability 80% 99% 99.5% 99.3%