HECToR Monthly Report, July 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 July 2008 to 08:00 1 August 2008
Number of hours: 720

1: Availability

Scheduled down time: 11 hours 37 minutes.

Incidents

The following incidents were recorded:

SeverityNumber
17
20
335
40

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

Details of severity level 1 incidents

ID Date Description Length Attribution
Incident-291 01/07/2008 Lustre failure after loss of OSS node 05:15 Cray
Incident-295 03/07/2008 Lustre fail after SCSI errors 03:50 Cray
Incident-297 06/07/2008 HSN collapse after compute node failure 03:18 Cray
Incident-311 13/07/2008 Machine fail after RX Packet error 01:55 Cray
Incident-320 21/07/2008 Fatal link error 02:19 Cray
Incident-324 24/07/2008 OST node failed after SCSI error 06:44 Cray
Incident-336 31/07/2008 OST 16 failed leading to utter collapse. 04:28 Cray

MTBF and Serviceability

AttributionFailuresMTBFUDTServiceability
Cray710527:49:0096.2%
Site0 ~ 00:00:00100%
External0 ~ 00:00:00100%
Other0 ~ 00:00:00100%
Overall710527:49:0096.2%
  • Note 1: Serviceability%= 100*(WCT-SDT-UDT)/(WCT-SDT)
  • Note 2: MTBF (Mean Time Between Failures) is defined as 732/Number of failures.

2: Courses

This information is supplied by NAG Ltd

Title of Course Dates Available places Total attending HECToR Users HECToR Staff
14 July 2008 Introduction to HECToR 20 3 2 0
18 July 2008 Introduction to HECToR 12 3 2 0
21-23 July 2008 Tools and Techniques for Optimising Parallel Codes 12 1 0 0

There was a course on Testing and Benchmarking scheduled for 18 July but there was no take-up.

3: Quality tokens

None set this month

4: Hours worked

GroupDays workedFTEs
USL76.3 4.3
OSG 65 3.7

5: Performance metrics

Technology Provision

Description TSL FSL Value
Technology reliability 85% 98.5% 96.2%
Technology throughput 7000 hours 8367 hours 8311 hours
Capability job completion rate 70% 90% 91 %
Technology MTBF 100 hours 126.4 hours 105 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% 100%
Number of SP FTEs 7.3 8.0 8.7 8.0
SP serviceability 80% 99% 99.5% 100%