The HECToR Service is now closed and has been superceded by ARCHER.

HECToR Monthly Report, May 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 May 2010 to 08:00 1 June 2010
Number of hours: 744

1: Availability

Scheduled down time: 22 hours 48 minutes.

Incidents

The following incidents were recorded:

SeverityNumber
15
22
326
40

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

Out of the 26 SEV-3 Incidents, 26 were attributed to single node failure events.

Details of severity level 1 incidents

,
ID Date Description Length Attribution
Incident-3431 02/05/2010 Cabinet emergency power down due to a power supply failure 04:54 Cray
Incident-3491 10/05/2010 Link inactive. Two modules replaced. 01:39 Cray
Incident-3566 18/05/2010 Link inactive. Two modules replaced. 00:59 Cray
Incident-3601 26/05/2010 Unplanned shutdown immediately prior to maintenance. User error executing script. 00:05 Cray
Incident-3631 31/05/2010 High speed network congestion. External lustre image removed. 02:12 Cray

MTBF and Serviceability

AttributionFailuresMTBFUDTServiceability
Cray514609:49:0098.6%
Site000:00:00100%
External000:00:00100%
Other000:00:00100%
Overall514609:49:0098.6%
  • 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 12
RX message CRC Error 7
RX packet sequence number error 1
MCA bk0 error (internal Opteron cache error) 2
UME bk4 (bk0 DIMMS) 2
Software/application related error 1
Heartbeat 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
Exploiting Parallel CASTEP on Large-scale HPC, NAG Manchester 17-18 May 2010 20 11 0 2 13
Parallel IO, NAG Oxford 19 May 2010 12 2 0 2 4
Advanced Computational Methods, University of Southampton Every Thursday in May (6,13,20,27) 20 9 MSc students (i.e. those being assessed) + 5 other attendees 0 0 14 (The numbers vary a bit from week to week)

3: Quality Tokens

Date Tokens Awarded Comment Consortium
11-May-2010 11:12:17 Que time is far too long as accounting is off! e05
11-May-2010 11:13:35 Jobs are taking too long to go on, whilst accounting is switched off!! e05
27-May-2010 08:47:09 Amount of queuing time ridiculous n02

4: Hours Worked

GroupDays workedFTEs
USL100.35.65
OSG83.1 4.61

5: Performance Metrics

Technology Provision

Description TSL FSL Value
Technology reliability 85% 98.5% 98.6%
Technology throughput 7000 hours 8367 hours 8393 hours
Capability job completion rate 70% 90% 94.3
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% 98.5%
Number of SP FTEs 7.3 8.0 8.7 10.3
SP Serviceability 80% 99% 99.5% 100%