The HECToR Service is now closed and has been superceded by ARCHER.

HECToR Monthly Report, March 2012

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 2012 to 08:00 1 April 2012
Number of hours: 744

1: Availability

Scheduled down time: 11 hours 41 minutes.

Incidents

The following incidents were recorded:

SeverityNumber
12
20
316
40

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

Out of the 16 SEV-3 Incidents, 16 were attributed to node failure events.

Details of severity level 1 incidents

ID Date Description Length Attribution
Incident-7331 07/03/2012 Maintenance overrun 01:45 Cray
Incident-7176 24/03/2012 PBS died (OOM on 'mom' nodes) 56:27 Cray

MTBF and Serviceability

AttributionFailuresMTBFUDTServiceability
Cray2 366 58:1292.1%
Site000:00100.0%
External000:00 100.0%
Other/Unknown000:00 100.0%
Overall2 36658:1292.1%
  • 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
MCA bank 4 error 6
Node Admindown (*) 4
HT lockup error 1
MCE threshold exceeded 1
Heartbeat error 2
Node down following PM (*) 2

(*) No user job lost

2: Courses

This information is supplied by NAG Ltd
Title of Course Dates Available Places Ordinary Attendees Paying Attendees CSE Staff Total Attending
Advanced Computational Methods II (MSc), University of Southampton on three Fridays in March. 30 24 0 0 24

3: Quality Tokens

Date Tokens Awarded Comment Consortium
7 March 2012 (three negative tokens) Lack of transparency - why do we have to login to the wiki to find out when maintenance sessions are? Could they be in the MOTD like on most other machines? c01

4: Hours Worked

GroupDays workedFTEs
USL 77.5 4.4
OSG 81.2 4.6

5: Performance Metrics

Technology Provision

Description TSL FSL Value
Technology reliability 85% 98.5% 92.1%
Technology throughput 7000 hours 8367 hours 7945 hours
Capability job completion rate 70% 90% 100%
Technology MTBF 100 hours 126.4 hours 366

Note: Technology throughput is calculated: 12*(732-UDT-SDT), where 732 is the 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% 99.0%
Number of SP FTEs 7.3 8.0 8.7 8.9
SP Serviceability 80% 99% 99.5% 100%