HECToR Monthly Report, October 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 October 2011 to 08:00 1 November 2011
Number of hours: 720

1: Availability

Scheduled down time: 14 hours 4 minutes.

Incidents

The following incidents were recorded:

SeverityNumber
10
20
310
40

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

Out of the 10 SEV-3 Incidents, 10 were attributed to node failure events. Two of the instances were nodes being admin downed by systems following failed health check and no user jobs were impacted.

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) 2
MCA bank 1/4 error 1
Voltage fault 2
HT lockup error 2
Admin down following failed health check 2
Failed 'xtbounce' during PM 1

2: Courses

This information is supplied by NAG Ltd
Title of Course Dates Available Places Ordinary Attendees Paying Attendees CSE Staff Total Attending
Debugging, Profiling and Optimising, University of Reading 7 - 8 October 2011 20 15 0 0 15
Object Oriented Programming in Fortran 2003, NAG Manchester 11 - 13 October 2011 25 11 0 5 16

3: Quality Tokens

Date Tokens Awarded Comment Consortium
19 Oct 2011 * * * * * Positive tokens - no user comments received x01
24 Oct 2011 * * * * * Positive tokens - no user comments received e05
26 Oct 2011 * * * * * Positive tokens - no user comments received x01

4: Hours Worked

GroupDays workedFTEs
USL 83.9 4.7
OSG 73.2 4.1

5: Performance Metrics

Technology Provision

Description TSL FSL Value
Technology reliability 85% 98.5% 100%
Technology throughput 7000 hours 8367 hours 8615 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 8.8
SP Serviceability 80% 99% 99.5% 100%