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Contents
StorNext 3.1.3 Installation Guide vi
Log Rolling Options ............................................................................... 123
Avoiding Poor System Performance........................................................... 124
Appendix C StorNext Files 125
The example.cfg File...................................................................................... 125
Commonly Used SNFS Files ........................................................................ 132
Appendix D Quality of Service Guide 135
Overview......................................................................................................... 136
Active vs. Passive.................................................................................... 136
Supported Platforms .............................................................................. 136
Configuration ................................................................................................. 137
Unit of I/O............................................................................................... 137
Converting MB/sec to I/O/sec............................................................ 137
Real-time I/O.................................................................................................. 142
SetRtio....................................................................................................... 143
Oversubscription .................................................................................... 143
Handles .................................................................................................... 143
Ungated files............................................................................................ 144
Calculating Available RTIO .................................................................. 145
Callbacks ......................................................................................................... 145
Callback Failures..................................................................................... 147
Tokens ...................................................................................................... 148
Failure Semantics.................................................................................... 149
FSM Failures............................................................................................ 150
Client Failures ......................................................................................... 150
Client Token Releases ............................................................................ 151
Monitoring ...................................................................................................... 151
Sharing Disk Resources................................................................................. 152