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