HECToR Monthly Report, November 2007

Information on the utilisation, disk allocations, slowdowns and helpdesk statistics can be found in the associated SAFE monthly report.

Dates covered: 08:00 1 November 2007 to 08:00 1 December 2007
Number of hours: 720

1: Availability

Scheduled down time: 11 hours 45 minutes

Incidents

The following incidents were recorded:

SeverityNumber
16
20
315
40

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

Details of severity level 1 incidents

IDDateDescriptionLengthAttribution
Incident-5211/11/2007OST nodes fail on partial HSN collapse3:22:00Cray
Incident-5312/11/2007UoE DNS server failure - no external access0:42:00Site
Incident-5514/11/2007System lockup after partial HSN failure1:58:50Cray
Incident-5715/11/2007Link failures take HSN down5:37:00Cray
Incident-6021/11/2007Service down11:09:00Cray
Incident-6223/11/2007Blower failure - service down1:44:00Cray

MTBF and Serviceability

AttributionFailuresMTBFUDTServiceability
Cray514623:50:5096.6%
Site17320:42:0099.9%
External0 - 00:00:00100%
Other0 - 00:00:00100%
Overall612224:32:5096.5%
  • Note 1: Serviceability%= 100*(WCT-SDT-UDT)/(WCT-SDT)
  • Note 2: MTBF (Mean Time Between Failures) is defined as 732/Number of failures.

2: Courses

This information is supplied by NAG Ltd

Title of Course Dates Length (Days) Available places HECToR User Days HECToR Staff Days
Techniques for Achieving Scalability 1/11/07 - 2/11/07 2 12 3 0
Testing and Benchmarking 6/11/07 - 7/11/07 2 12 4 0
Tools and Techniques for Optimising Codes 8/11/07 - 9/11/07 2 12 5 1

3: Quality tokens

None set this month.

4: Hours worked

GroupDays workedFTEs
USL96.55.4
OSG33.03.5

5: Performance metrics

Technology Provision

Description TSL FSL Value
Technology reliability 85% 98.5% 96.6%
Technology throughput 7000 hours 8367 hours 8348 hours
Capability job completion rate 70% 90% 97%
Technology MTBF 100 hours 126.4 hours 146 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 8.9
SP serviceability 80% 99% 99.5% 99.9%