The HECToR Service is now closed and has been superceded by ARCHER.

HECToR Monthly Report, October 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 October 2009 to 08:00 1 November 2009
Number of hours: 744

1: Availability

Scheduled down time: 15 hours 00 minutes.

Incidents

The following incidents were recorded:

SeverityNumber
10
21
314
40

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

Out of the 14 SEV-3 Incidents, 14 were attributed to single node failures.

Details of severity level 1 incidents

None this month.

MTBF and Serviceability

AttributionFailuresMTBFUDTServiceability
Cray000:00:00100%
Site000:00:00100%
External000:00:00100%
Other000:00:00100%
Overall000:00:00100%
  • 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
UME bk0/bk4 (Dimms) 5
UME Bank 1 (Internal Opteron) 1
RX message header CRC Error 7
RX packet sequence number error 1

2: Courses

This information is supplied by NAG Ltd
Title of Course Dates Available Places Ordinary Attendees Paying Attendees CSE Staff Total Attending
Advanced MPI, NAG Manchester 7 October 2009 12 2 0 1 3
Parallel IO, NAG Manchester 8 October 2009 12 3 0 2 5
Best Practice in HPC Software Development, NAG Oxford 12 - 16 October 2009 12 6 0 0 6
Best Practice in HPC Software Development, NAG Manchester 19 -23 October 2009 12 9 0 2 11
Introduction to HECToR, University of Oxford 22 October 2009 12 9 0 0 9

3: Quality Tokens

Date Tokens Awarded Comment Consortium
07-Oct-2009 15:29:41 Several unexplained shutdowns, a damaged node and long maintenance sessions. People run experiments during the week but weekends the machine is generally left a lot emptier, it would make sense to do work restoring nodes on a Sunday not a Wednesday. n02
07-Oct-2009 16:05:35 HECToR has recently had unpredictable and planned outages. The weekly maintenance, may be convenient for the engineers, but being in the middle of the week is exactly when scientists are working? n02
15-Oct-2009 14:20:53 * * * * * great support e90
30-Oct-2009 10:53:31 * * * * N/A e24

4: Hours Worked

GroupDays workedFTEs
USL 76.7 4.3
OSG 81.8 4.6

5: Performance Metrics

Technology Provision

Description TSL FSL Value
Technology reliability 85% 98.5% 100%
Technology throughput 7000 hours 8367 hours 8604 hours
Capability job completion rate 70% 90% 100%
Technology MTBF 100 hours 126.4 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% 98.8%
Number of SP FTEs 7.3 8.0 8.7 8.9
SP Serviceability 80% 99% 99.5% 100%