HECToR Monthly Report, November 2010

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

This report relates to the Phase 2a service only. Performance statistics for the non-contractual Phase 2b system can be found here.

Dates covered: 08:00 1 November 2010 to 08:00 1 December 2010
Number of hours: 720

1: Availability

Scheduled down time: 5 hours 50 minutes.

Incidents

The following incidents were recorded:

SeverityNumber
11
20
39
40

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

Out of the 9 SEV-3 Incidents, 9 were attributed to single node failure events.

Details of severity level 1 incidents

ID Date Description Length Attribution
Incident-4896 30/11/2010 HT error caused esfs hangup 03:59 Cray

MTBF and Serviceability

AttributionFailuresMTBFUDTServiceability
Cray173203:5999.4%
Site000:00100%
External000:00100%
Other000:00100%
Overall173203:5999.4%
  • 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
RX message CRC Error 1
RX message header CRC Error 4
RX packet sequence number error 2
MCA bank 0 error (internal Opteron cache error) 1
Software error - kernel panic 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 Warwick 8 - 9 November 2010 20 11 0 0 11
Parallel Programming with MPI, University of Edinburgh 8 - 10 November 2010 15 15 0 0 15
OpenMP, University of Edinburgh 11 - 12 November 2010 15 12 0 0 12

3: Quality Tokens

Date Tokens Awarded Comment Consortium
30-Nov-2010 11:45:23 * * * * 4 star tokens, no comments from the user x01
30-Nov-2010 11:45:23 Filesystem response time is unacceptable!!! e05

4: Hours Worked

GroupDays workedFTEs
USL81.24.6
OSG78.74.4

5: Performance Metrics

Technology Provision

Description TSL FSL Value
Technology reliability 85% 98.5% 99.4%
Technology throughput 7000 hours 8367 hours 8665 hours
Capability job completion rate 70% 90% 92.9%
Technology MTBF 100 hours 126.4 hours 732

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% 99.5%
Number of SP FTEs 7.3 8.0 8.7 9.0
SP Serviceability 80% 99% 99.5% 100%