HECToR Monthly Report, September 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 September 2010 to 08:00 1 October 2010
Number of hours: 720

1: Availability

Scheduled down time: 11 hours 25 minutes

Incidents

The following incidents were recorded:

SeverityNumber
12
20
323
40

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

Out of the 23 SEV-3 Incidents, 23 were attributed to single node failure events.

Details of severity level 1 incidents

ID Date Description Length Attribution
Incident-4466 07/09/2010 Blue Arc failure hung /home filesystem 01:00 Cray
Incident-4526 16/09/2010 Shutdown due to security vulnerability 27:23 External

MTBF and Serviceability

AttributionFailuresMTBFUDTServiceability
Cray173201:0099.9%
Site000:00100%
External1 73227:2396.1%
Other000:00100%
Overall236628:2396.0%
  • 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 5
MCA bk0-bk4 error 5
Software/application related error 3
Heartbeat error 1
Node(s) admin down 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, University of Leeds 6-9 September 2010 30 25 1 0 26
Introduction to HECToR, NAG Oxford 6 September 2010 20 1 0 0 1
Debugging, Profiling and Optimisation, NAG Oxford 7-8 September 2010 20 6 0 0 6
OpenMP, University of Leeds 9-10 September 2010 30 16 0 0 16
Multicore, NAG Oxford 9 September 2010 20 8 0 0 8
Programming the X2 Vector System, NAG Manchester 13-14 September 2010 20 1 0 0 1
Introduction to HECToR, NAG Manchester 20 September 2010 20 9 0 0 9
Debugging, Profiling and Optimising, NAG Manchester 21-22 September 2010 20 4 0 1 5
Multicore, NAG Manchester 23 September 2010 20 7 0 0 7
Core Algorithms for High Performance Scientific Computing, University of Warwick 27 September - 1 October 2010 30 26 0 2 28

3: Quality Tokens

Date Tokens Awarded Comment Consortium
08-Sep-2010 11:43:24 * * * * * Positive feedback; no comment from the user e89

4: Hours Worked

GroupDays workedFTEs
USL78.54.4
OSG83.1 4.7

5: Performance Metrics

Technology Provision

Description TSL FSL Value
Technology reliability 85% 98.5% 99.9%
Technology throughput 7000 hours 8367 hours 8306 hours
Capability job completion rate 70% 90% 96.7%
Technology MTBF 100 hours 126.4 hours 732

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% 97.7%
Number of SP FTEs 7.3 8.0 8.7 9.1
SP Serviceability 80% 99% 99.5% 100%