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

1: Availability

Scheduled down time: 15 hours 6 minutes.

Incidents

The following incidents were recorded:

SeverityNumber
14
20
322
40

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

Out of the 22 SEV-3 Incidents, 21 were attributed to single node failures, and another 1 nodes closed down by administrators

Details of severity level 1 incidents

ID Date Description Length Attribution
Incident-2091 12/08/2009 Link Inactive c17-1c1s7s0l5 c17-2c1s7s3l0 06:53 Cray
Incident-2127 19/08/2009 Maintenance session over-run 00:12 Cray
Incident-2157 23/08/2009 Blue Arc problem - /nfs02 filesystems unmounted 16:11 Cray
Incident-2187 28/08/2009 Link Inactive error 01:23 Cray

MTBF and Serviceability

AttributionFailuresMTBFUDTServiceability
Cray418324:39:0096.6%
Site000:00:00100%
External000:00:00100%
Other000:00:00100%
Overall418324:39:0096.6%
  • 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) 13
RX message header CRC Error 6
MCA bk0 error (internal Opteron) 2
Admin down 1

2: Courses

This information is supplied by NAG Ltd
Title of Course Dates Available Places Ordinary Attendees Paying Attendees CSE Staff Total Attending
X2 Training, Imperial College London 5 August 2009 6 4 0 0 4
Introduction to HECToR, NAG Oxford 26 August 2009 12 3 0 0 3

3: Quality Tokens

None set this month.

4: Hours Worked

GroupDays workedFTEs
USL73.04.1
OSG76.24.3

5: Performance Metrics

Technology Provision

Description TSL FSL Value
Technology reliability 85% 98.5% 96.6%
Technology throughput 7000 hours 8367 hours 8307 hours
Capability job completion rate 70% 90% 100 %
Technology MTBF 100 hours 126.4 hours 183 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 8.4
SP Serviceability 80% 99% 99.5% 100%