HECToR Monthly Report, July 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 July 2009 to 08:00 1 August 2009
Number of hours: 744

1: Availability

Scheduled down time: 50 hours 21 minutes. This includes downtime for Phase 2A upgrade.

Incidents

The following incidents were recorded:

SeverityNumber
14
21
347
40

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

Out of the 47 SEV-3 Incidents, 47 were attributed to single node failures.

Details of severity level 1 incidents

ID Date Description Length Attribution
Incident-1771 02/07/2009 HSN contention caused full system failure 01:44 Cray
Incident-1806 06/07/2009 /etc/nologin set by closedown script 00:15 OSG
Incident-1846 09/07/2009 Link Inactive error 01:08 Cray
Incident-1996 24/07/2009 Link Inactive error 01:30 Cray

MTBF and Serviceability

AttributionFailuresMTBFUDTServiceability
Cray324404:22:0099.4%
Site173200:15:0099.9%
External000:00:00100%
Other000:00:00100%
Overall418304:37:0099.3%
  • 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 XT single node failures

Error Type Number
UME bk0/bk4 (Dimms) 27
RX message header CRC Error 16
Heartbeat faults 4

2: Courses

This information is supplied by NAG Ltd
Title of Course Dates Available Places Ordinary Attendees Paying Attendees CSE Staff Total Attending
OpenMP and Mixed Mode Programming, Queens University of Belfast 1 - 2 July 2009 24 12 0 0 12
NERC Summer School, Beginner Stream, BAS Cambridge 8 - 9 July 2009 17 17 0 0 17
NERC Summer School, Advanced Stream, BAS Cambridge 8 - 9 July 2009 16 16 0 0 16

3: Quality Tokens

None set this month.

4: Hours Worked

GroupDays workedFTEs
USL91.55.2
OSG68.43.8

5: Performance Metrics

Technology Provision

Description TSL FSL Value
Technology reliability 85% 98.5% 99.4%
Technology throughput 7000 hours 8367 hours 8124 hours
Capability job completion rate 70% 90% 96.3 %
Technology MTBF 100 hours 126.4 hours 244 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% 100%
Number of SP FTEs 7.3 8.0 8.7 9.0
SP Serviceability 80% 99% 99.5% 99.9%