HECToR Monthly Report, December 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 December 2007 to 08:00 1 January 2008
Number of hours: 744

1: Availability

Scheduled down time: 11 hours 25 minutes

Incidents

The following incidents were recorded:

SeverityNumber
11
20
311
40

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

Details of severity level 1 incidents

IDDateDescriptionLengthAttribution
Incident-7627/12/2007OST nodes fail on partial HSN collapse2:31:00Cray

MTBF and Serviceability

AttributionFailuresMTBFUDTServiceability
Cray174402:31:0099.6%
Site0 - 00:00:00100%
External0 - 00:00:00100%
Other0 - 00:00:00100%
Overall174402:31:0099.6%
  • 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
Programming for Porting and Maintenance 4/12/07 - 5/12/07 2 12 0 0
Programming Tricks for HECToR 11/12/07 - 12/12/07 2 12 0 0
Techniques for Achieving Scalability 13/12/07 - 14/12/07 2 12 0 0

3: Quality tokens

Dec 17, 2007 4:20:20 PM Prof Dario Alfe` * * * * * very good machine, staff extremely helpful

4: Hours worked

GroupDays workedFTEs
USL 73.2 4.3
OSG 68.2 3.8

5: Performance metrics

Technology Provision

Description TSL FSL Value
Technology reliability 85% 98.5% 99.6%
Technology throughput 7000 hours 8367 hours 8617 hours
Capability job completion rate 70% 90% 98%
Technology MTBF 100 hours 126.4 hours 744 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 8.1
SP serviceability 80% 99% 99.5% 100%