The HECToR Service is now closed and has been superceded by ARCHER.

HECToR Monthly Report, January 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 2a service only. Performance statistics for the non-contractual Phase 2b system can be found here.

Dates covered: 08:00 1 January 2011 to 08:00 1 February 2011
Number of hours: 744

1: Availability

Scheduled down time: 8 hours 18 minutes.

Incidents

The following incidents were recorded:

SeverityNumber
13
20
313
40

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-5476 06/01/2011 Cabinet Emergency Power Off Due to Power Supply Failure 02:23 Cray
Incident-5506 08/01/2011 esFS disruption due to module cage problem 00:36 Cray
Incident-5606 22/01/2011 Card cage failure 01:59 Cray

MTBF and Serviceability

AttributionFailuresMTBFUDTServiceability
Cray324404:5899.3%
Site000:00100%
External000:00100%
Other000:00100%
Overall324404:5899.3%
  • 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 CRC Error 3
RX message header CRC Error 6
MCA bank 4 error (DIMMs) 2
RX packet sequence number error 2

2: Courses

This information is supplied by NAG Ltd
Title of Course Dates Available Places Ordinary Attendees Paying Attendees CSE Staff Total Attending
Parallel Programming with MPI, Imperial College London 4-6 January 2011 40 11 1 0 12
OpenMP, Imperial College London 11-12 January 2011 40 11 0 1 12
Parallel Programming with MPI, University of Bath 19-21 January 2011 32 10 0 0 10

3: Quality Tokens

Date Tokens Awarded Comment Consortium
12/01/2011 * * * * * Very fast reply to support request from helpdesk c01/e05/e117
17/01/2011 * * * * * Five positive tokens. No comment from the user e05
27/01/2011 * * * * Four positive tokens. No comment from the user d23

4: Hours Worked

GroupDays workedFTEs
USL65.23.67
OSG79.84.50

5: Performance Metrics

Technology Provision

Description TSL FSL Value
Technology reliability 85% 98.5% 99.3%
Technology throughput 7000 hours 8367 hours 8624 hours
Capability job completion rate 70% 90% 100%
Technology MTBF 100 hours 126.4 hours 244 hours

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% 99.6%
Number of SP FTEs 7.3 8.0 8.7 8.2
SP Serviceability 80% 99% 99.5% 100%