The HECToR Service is now closed and has been superceded by ARCHER.

HECToR Monthly Report, February 2011

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

From 1 February 2011, Phase 2b is the contracted service. 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 February 2011 to 08:00 1 March 2011
Number of hours: 672

1: Availability

Scheduled down time: 16 hours 35 minutes.

Incidents

The following incidents were recorded:

SeverityNumber
12
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-5776 20/02/2011 All LNET routers down 00:42 Cray
Incident-5806 26/02/2011 esFS failure - no access to /work 08:26 Cray

MTBF and Serviceability

AttributionFailuresMTBFUDTServiceability
Cray236609:0898.61%
Site000:00100%
External000:00100%
Other000:00100%
Overall236609:0898.61%
  • 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 - kernel panic/heartbeat error 2
HT lockup 3
MCA bank 4 error (DIMMs) 3
Voltage fault 1
Nodes admin down 2
Nodes cold start 1

2: Courses

This information is supplied by NAG Ltd
Title of Course Dates Available Places Ordinary Attendees Paying Attendees CSE Staff Total Attending
Fortran 95, King's College London 16 - 18 February 2011 50 43 0 1 44
Advanced Computational Methods II (MSc), University of Southampton Every Thursday in February (1,8,15,22) 2011 20 18 0 0 18

3: Quality Tokens

Date Tokens Awarded Comment Consortium
01/02/2011 * * * * Four positive tokens. No comment from the user e05
23/02/2011 * * Two positive tokens. No comment from the user e10/e24

4: Hours Worked

GroupDays workedFTEs
USL70.84.0
OSG76.74.3

5: Performance Metrics

Technology Provision

Description TSL FSL Value
Technology reliability 85% 98.5% 98.6%
Technology throughput 7000 hours 8367 hours 8475 hours
Capability job completion rate 70% 90% 100%
Technology MTBF 100 hours 126.4 hours 366 hours

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% 99.4%
Number of SP FTEs 7.3 8.0 8.7 8.3
SP Serviceability 80% 99% 99.5% 100%