HECToR Monthly Report, September 2011

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 2011 to 08:00 1 October 2011
Number of hours: 720

1: Availability

Scheduled down time: 10 hours 44 minutes.

Incidents

The following incidents were recorded:

SeverityNumber
10
20
318
40

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

Out of the 18 SEV-3 Incidents, 18 were attributed to node failure events.

Details of severity level 1 incidents

None this month.

MTBF and Serviceability

AttributionFailuresMTBFUDTServiceability
Cray000:00100.0%
Site000:00100.0%
External000:00 100.0%
Other/Unknown000:00 100.0%
Overall000:00 100.0%
  • 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
Software problem (related to a user application, bug #775153) 12
MCA bank 1/4 error 4
Voltage fault 1
Thermal trip on processor 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, University of Southampton 19-21 September 2011 40 17 0 0 17
Core Algorithms for High Performance Scientific Computing, Uni of Warwick 26-30 September 2011 36 24 0 0 24
Introduction to HECToR, University of Oxford 30 September 2011 12 1 0 0 1

3: Quality Tokens

Date Tokens Awarded Comment Consortium
22-Sep-2011 * * * * * Positive tokens - no user comments received x01
29-Sep-2011 * * * * * Positive tokens - no user comments received e139

4: Hours Worked

GroupDays workedFTEs
USL 82.6 4.6
OSG 79.0 4.5

5: Performance Metrics

Technology Provision

Description TSL FSL Value
Technology reliability 85% 98.5% 100%
Technology throughput 7000 hours 8367 hours 8655 hours
Capability job completion rate 70% 90% 100%
Technology MTBF 100 hours 126.4 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% 98.7%
Number of SP FTEs 7.3 8.0 8.7 9.1
SP Serviceability 80% 99% 99.5% 100%