The HECToR Service is now closed and has been superceded by ARCHER.

HECToR Monthly Report, October 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 October 2008 to 08:00 1 November 2008
Number of hours: 744

1: Availability

Scheduled down time: 17 hours 49 minutes.

Incidents

The following incidents were recorded:

SeverityNumber
13
20
320
40

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

All of the above SEV-3 Incidents were attributed to single node failures.

Details of severity level 1 incidents

ID Date Description Length Attribution
Incident-426 02/10/2008 NID renumbering caused applications to be unplaced 13:28 Cray
Incident-429 03/10/2008 Link failure 01:06 Cray
Incident-444 21/10/2008 Lustre errors made system unusable 01:30 Cray

MTBF and Serviceability

AttributionFailuresMTBFUDTServiceability
Cray324416:04:0097.7%
Site000:00:00100%
External000:00:00100%
Other000:00:00100%
Overall324416:04:0097.7%
  • 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 8
MCA bk0 error (Internal Opteron) 6
UME bk0/bk4 (Dimms) 4
Heartbeat Fault 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 7 October 2008 20 6 0 0 6
Tools and Techniques for Optimising Code on HECToR, NAG Oxford 8 - 10 October2008 12 2 0 0 2
Introduction to MPI, Birmingham University (1) 14 - 16 October, 2008 20 22 0 0 22
X2 programming, NAG Oxford (2) 21 October, 2008 12 0 0 0 0
Portability and Maintainability, NAG Oxford (3) 23 - 24 October, 2008 12 0 0 0 0
Scientific visualisation, NAG Oxford (4) 27 - 28 October, 2008 12 0 0 0 0
Testing and Benchmarking, NAG Oxford (5) 29 October, 2008 12 0 0 0 0

(1) 5 people were turned away.

(2) Cancelled. 1 person registered, but by mutual agreement will attend in December instead

(3) Cancelled.

(4) Cancelled. 1 person registered, but after discussion it was agreed the course did not meet their needs

(5) Cancelled.

3: Quality tokens

None set this month.

4: Hours worked

GroupDays workedFTEs
USL64.9 3.7
OSG88.7 5.0

5: Performance metrics

Technology Provision

Description TSL FSL Value
Technology reliability 85% 98.5% 97.7%
Technology throughput 7000 hours 8367 hours 8377 hours
Capability job completion rate 70% 90% 98%
Technology MTBF 100 hours 126.4 hours 244 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% 99%
Number of SP FTEs 7.3 8.0 8.7 8.7
SP serviceability 80% 99% 99.5% 100%