The HECToR Service is now closed and has been superceded by ARCHER.

HECToR Monthly Report, March 2010

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

Dates covered: 08:00 1 March 2010 to 08:00 1 February 2010
Number of hours: 744

1: Availability

Scheduled down time: 11 hours 02 minutes.

Incidents

The following incidents were recorded:

SeverityNumber
17
20
329
40

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

Out of the 29 SEV-3 Incidents, 29 were attributed to single node failure events.

Details of severity level 1 incidents

ID Date Description Length Attribution
Incident-3077 01/03/2010 Voltage fault on module 01:19 Cray
Incident-3107 05/03/2010 High Speed Network Failure. Faulty Mezzanine replaced 01:43 Cray
Incident-3102 07/03/2010 Loss of chilled-water due to valve failure 20:38 Site
Incident-3192 17/03/2010 Link Error caused High Speed Network failure 01:09 Cray
Incident-3257 30/03/2010 Cabinet Emergency Power Off. Blower Fault 08:44 Cray
Incident-3262 30/03/2010 MDS node failure 02:35 Cray
Incident-3267 30/03/2010 Fault on 11kV distribution network 14:18 External

MTBF and Serviceability

AttributionFailuresMTBFUDTServiceability
Cray514615:30:0097.9%
Site1 732 20:38:0097.2%
External1 732 14:18:0098.0%
Other000:00:00100%
Overall710550:26:0093.1%
  • 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 header CRC Error 11
RX message CRC Error 2
RX packet sequence number error 1
MCA bk0 error (internal Opteron cache error) 1
Software/application related error (*) 9
Admin down/out of config 3
Heartbeat error 2

(*) Note: Two of the node failures were attributed to a portals bug, now fixed with CLE 2.2 upgrade

2: Courses

This information is supplied by NAG Ltd
Title of Course Dates Available Places Ordinary Attendees Paying Attendees CSE Staff Total Attending
Fortran95, Oxford 24 - 26 March 2010 12 10 0 0 10
Advanced Computational Methods, University of Southampton Every Thursday in March (4,11,18,25) 20 14 (of which 9 MSc students) 0 0 14 (numbers vary slightly from week to week)

3: Quality Tokens

Date Tokens Awarded Comment Consortium
31-Mar-2010 10:30:52 Hector down again
(three sets of penalty tokens in total by the same user on 30-31 March 2010)
n02
23-Mar-2010 11:23:52 * * * * Amazing resource for research e136
04-Mar-2010 09:23:11 Repeated unplanned system downtime, scheduling problems and maintenance overruns n02
02-Mar-2010 18:20:22 * * * No miracles have been performed, but responsiveness is good and the support is both friendly and helpful. e24

4: Hours Worked

GroupDays workedFTEs
USL83.94.73
OSG82.24.63

5: Performance Metrics

Technology Provision

Description TSL FSL Value
Technology reliability 85% 98.5% 97.9%
Technology throughput 7000 hours 8367 hours 8046 hours
Capability job completion rate 70% 90% 97.7%
Technology MTBF 100 hours 126.4 hours 146

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% 98.9%
Number of SP FTEs 7.3 8.0 8.7 9.4
SP Serviceability 80% 99% 99.5% 97.2%