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Chapter 4 Configuring StorNext
Windows Configuration Utilities
StorNext 3.5 Installation Guide 78
I/O Retry Time
Seconds
When you choose Allow I/O Timouts, this
option controls the I/O retry behavior. This
parameter establishes the amount of time that
may elapse during an I/O retry sequence.
An I/O retry sequence consists of the
following:
• Retry an I/O request across all available
paths that are currently present.
• Compare the current time to the
Instantiation time of the I/O request, if at
least <n> seconds have elapsed, return the
I/O request in error, otherwise reset the
paths used, and retry again.
I/O Penalty TIme
Seconds
This option controls the Multi-Path I/O
penalty value, where <n> is expressed in
seconds with a minimum value of 1 and a
maximum value of 15.
This parameter establishes the amount of time
a Path_In_Error will be bypassed in favor of
an Operational Path during a Multi-Path
selection sequence. If all paths are currently in
the Path_In_Error state, the first available
path will be selected, independent of the
Path_In_Error state.
The default value is 5 seconds.
Fast Failover
Detection
When this box is checked, the client uses a
more aggressive approach to detecting if the
FSM has failed. With this option on, the client
monitors the FSM heartbeat. If no heartbeat is
detected within three (3) seconds, a failover
request is initiated.
This option is desirable for near realtime
activities that cannot sustain more than 10
seconds of access loss to the server. Quantum
does not recommend enabling this option for
normal file system operations.
Field / Button Description