Struct SequentialFileReaderBuilder 

pub struct SequentialFileReaderBuilder<'sp> { /* private fields */ }

Utility for building SequentialFileReader with specified tuning options.

Implementations

impl<'sp> SequentialFileReaderBuilder<'sp>

pub fn new() -> Self

pub fn use_registered_buffers(self, register_buffers: bool) -> Self

Set whether to register buffer with io_uring for improved performance.

Enabling requires available memlock ulimit to be higher than sizes of registered buffers.

pub fn use_direct_io(self, use_direct_io: bool) -> Self

Read files in direct-IO mode (disables kernel caching of read contents).

Enabling requires the filesystem to support directio and read_capacity to be a multiple of 4096.

pub fn shared_sqpoll(self, shared_sqpoll_fd: Option<BorrowedFd<'sp>>) -> Self

Use (or remove) a shared kernel thread to drain submission queue for IO operations

pub fn build<'a>(self, buf_capacity: usize) -> Result<SequentialFileReader<'a>>

Build a new SequentialFileReader with internally allocated buffer.

Buffer will hold at least buf_capacity bytes (increased to read_capacity if it’s lower).

Initially the reader is idle and starts reading after set_file is called. It will then execute multiple read_capacity sized reads in parallel to fill the buffer.