HECToR Monthly Report, December 2008

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 2008 to 08:00 1 January 2009
Number of hours: 720

1: Availability

Scheduled down time: 28 hours 39 minutes.

Incidents

The following incidents were recorded:

SeverityNumber
15
20
330
40

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

Out of the 30 SEV-3 Incidents, 29 were attributed to single node failures.

Details of severity level 1 incidents

ID Date Description Length Attribution
Incident-556 13/12/2008 Service reload after Lustre errors 03:33 Cray
Incident-586 20/12/2008 Lustre problem caused full service failure 03:57 Cray
Incident-601 22/12/2008 Lustre problem caused full service failure 02:08 Cray
Incident-651 30/12/2008 Lustre problem caused full service failure 01:18 Cray
Incident-656 31/12/2008 Press. unit fails - all chilled water lost 04:17 Site

MTBF and Serviceability

AttributionFailuresMTBFUDTServiceability
Cray418310:56:0098.5%
Site173204:17:0099.4%
External000:00:00100%
Other000:00:00100%
Overall514615:13:0097.9%
  • 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 XT single node failures

Error Type Number
RX message header CRC Error 18
MCA bk0 error (Internal Opteron) 2
UME bk0/bk4 (Dimms) 4
"Invalid opcode" error 2

2: Courses

This information is supplied by NAG Ltd

Title of Course Dates Available places Ordinary attendees Paying attendees CSE Staff Total attending
Introduction to HECToR, NAG Oxford 9 December 2008 20 2 0 0 2
X2 programming, NAG Oxford 10 - 11 December 2008 12 2 0 0 2

3: Quality tokens

15 December 2008 15:33:48 Dr Richard L Anderson *****  
18 December 2008 15:26:16 Mr Andrea Spitaleri ***** I get useful and quick answer to my problems (queue and software optmisation)

4: Hours worked

GroupDays workedFTEs
USL72.24.1
OSG693.9

5: Performance metrics

Technology Provision

Description TSL FSL Value
Technology reliability 85% 98.5% 98.5%
Technology throughput 7000 hours 8367 hours 8258 hours
Capability job completion rate 70% 90% 100%
Technology MTBF 100 hours 126.4 hours 183 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%
Number of SP FTEs 7.3 8.0 8.7 8.0
SP serviceability 80% 99% 99.5% 99.4%