HECToR Monthly Report, September 2009

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 2009 to 08:00 1 October 2009
Number of hours: 720

1: Availability

Scheduled down time: 11 hours 30 minutes.

Incidents

The following incidents were recorded:

SeverityNumber
15
22
321
40

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

Out of the 21 SEV-3 Incidents, 21 were attributed to single node failures.

Details of severity level 1 incidents

ID Date Description Length Attribution
Incident-2232 07/09/2009 Close for security alert 28:05 External*
Incident-2262 11/09/2009 High speed network failure 02:19 Cray
Incident-2297 23/08/2009 Link Inactive error 02:45 Cray
Incident-2367 28/09/2009 Services unavailable - filesystem full 02:24 OSG
Incident-2392 30/09/2009 Shutdown due to risk of loss of cooling 01:45 OSG/External**

* An external unix security alert resulted in the service being closed. This was a preventative measure and there was no breach of HECToR security.

** A fault on the external power distribution network triggered a plant fault.

MTBF and Serviceability

AttributionFailuresMTBFUDTServiceability
Cray236605:04:0099.3%
Site1.548803:16:0099.5%
External1.548828:57:0095.9%
Other000:00:00100%
Overall514637:18:0094.7%
  • 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
UME bk0/bk4 (Dimms) 6
UME on MDC2 (X2 node failure) 1
RX message header CRC Error 11
MCA bk0 error (internal Opteron) 1
Heartbeat 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
Fortran 95, University of Exeter 7 - 9 September 2009 30 11 1 0 12
Parallel Programming with MPI, University of Exeter 14 - 16 September 2009 30 24 1 0 25
Introduction to HECToR, University of Exeter 21 September 2009 30 5 0 0 5
OpenMP and Mixed Mode Programming, University of Exeter 22 - 23 September 2009 30 17 0 0 17
Core Algorithms for High Performance Scientific Computing, University of Warwick 28 September - 2 October 2009 30 29 0 0 29

3: Quality Tokens

Date Tokens Awarded Comment
30-Sep-2009 21:56:26 * * * * * Positive feedback from e63 consortium

4: Hours Worked

GroupDays workedFTEs
USL87.64.94
OSG77.174.35

5: Performance Metrics

Technology Provision

Description TSL FSL Value
Technology reliability 85% 98.5% 99.3%
Technology throughput 7000 hours 8367 hours 8198 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); 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% 98.3%
Number of SP FTEs 7.3 8.0 8.7 9.3
SP Serviceability 80% 99% 99.5% 99.4%