FILE_SFIO_RESERVE_INFORMATION structure (wdm.h)
FILE_SFIO_RESERVE_INFORMATION is used to query or set a file's reserved bandwidth information for scheduled file I/O (SFIO).
Syntax
typedef struct _FILE_SFIO_RESERVE_INFORMATION {
ULONG RequestsPerPeriod;
ULONG Period;
BOOLEAN RetryFailures;
BOOLEAN Discardable;
ULONG RequestSize;
ULONG NumOutstandingRequests;
} FILE_SFIO_RESERVE_INFORMATION, *PFILE_SFIO_RESERVE_INFORMATION;
Members
RequestsPerPeriod
Number of I/O requests that complete per period of time, as specified by the Period field. When setting bandwidth reservation, a value of 0 indicates to the file system that it must free any existing reserved bandwidth.
Period
The period for reservation, which is the time from which the I/O is issued to the kernel until the time the I/O should be completed, specified in milliseconds.
RetryFailures
Boolean value.
Discardable
Boolean value. When TRUE, the I/O should be completed with an error if a driver is unable to satisfy the I/O within the deadline.
RequestSize
Minimum size of any individual I/O request that can be issued by an application using bandwidth reservation.
NumOutstandingRequests
The number of RequestSize I/O requests allowed to be outstanding at any time. When setting reservations, this field MUST be ignored by servers and SHOULD be set to 0 by clients.
Requirements
| Requirement | Value |
|---|---|
| Header | wdm.h |