Scalla: Extended Features Supplement

Cluster Management Service

Configuration Reference

Andrew Hanushevsky

Stanford Linear Accelerator Center

11-April-2008

Scalla: Structured Cluster Architecture for Low Latency Access

©2003-2008 by the Board of Trustees of the Leland Stanford, Jr., University

All Rights Reserved

Produced under contract DE-AC02-76-SFO0515 with the Department of Energy

This code is available under a BSD-style license allowing minimally restricted use.

1 Introduction. 5

1.1 Directives and Components. 9

1.1.1 Clusters with 64 or fewer data servers. 9

1.1.2 Clusters with 65 or more data servers. 11

1.1.3 Frequently asked questions. 14

1.2 Created Files. 17

1.3 Starting the cmsd Process. 19

1.3.1 Running multiple cmsd’s on the same host 22

1.3.2 Using the StartCMS Script to Start cmsd. 23

1.3.3 Using the StopCMS Script to Stop cmsd. 24

2 Mandatory Configuration Directives. 25

2.1 manager 25

2.2 role. 27

2.2.1 Role Summary Table. 28

3 Common Configuration Directives. 31

3.1 adminpath. 31

3.2 allow.. 32

3.3 cache (an oss directive) 33

3.4 defaults (an oss directive) 35

3.5 export 37

3.6 localroot (an oss directive) 38

3.7 perf 39

3.8 prep. 41

3.8.1 Default Prepare Request Message (prepmsg) 43

3.8.2 The Peparer Cancel Message. 44

3.8.3 The Prepare Query Message. 44

3.9 sched. 45

3.10 seclib. 47

3.11 space. 48

4 Esoteric Configuration Directives. 51

4.1 conwait 51

4.2 delay. 53

4.3 fxhold. 56

4.4 fsxeq. 57

4.5 namelib (an oss directive) 59

4.6 nowait 60