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Contents
StorNext 3.5 Installation Guide vi
Viewing a Fibre Channel Device ................................................................. 124
StorNext Log Rolling Administration......................................................... 125
Changing Log Rolling Times ................................................................ 125
Log Rolling Options ............................................................................... 125
Avoiding Poor System Performance........................................................... 126
Appendix C StorNext Files 127
The example.cfg File...................................................................................... 127
Cluster-Wide Central Control...................................................................... 134
Cluster-Wide Control File Example..................................................... 135
Commonly Used SNFS Files ........................................................................ 138
Appendix D Quality of Service Guide 142
Overview......................................................................................................... 143
Active vs. Passive.................................................................................... 143
Supported Platforms .............................................................................. 143
Non-Realtime Operation ....................................................................... 144
Configuration ................................................................................................. 144
Unit of I/O............................................................................................... 144
Converting MB/sec to I/O/sec............................................................ 145
Real-time I/O.................................................................................................. 149
SetRtio....................................................................................................... 150
Oversubscription .................................................................................... 150
Handles .................................................................................................... 150
Ungated files............................................................................................ 151
Calculating Available RTIO .................................................................. 152
Non-Realtime I/O Configuration................................................................ 152
Configuration File Examples................................................................. 153
Callbacks ......................................................................................................... 154
Callback Failures..................................................................................... 155
Tokens ...................................................................................................... 156
Failure Semantics.................................................................................... 158
FSM Failures............................................................................................ 159
Client Failures ......................................................................................... 159
Client Token Releases ............................................................................ 160
Monitoring ...................................................................................................... 160
Sharing Disk Resources................................................................................. 161