VFS_IO_URING

Section: System Administration tools (8)
Updated: 04/07/2021
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NAME

vfs_io_uring - Implement async io in Samba vfs using io_uring of Linux (>= 5.1).

SYNOPSIS

: vfs objects = io_uring

DESCRIPTION

This VFS module is part of the samba(7) suite.

The io_uring VFS module enables asynchronous pread, pwrite and fsync using the io_uring infrastructure of Linux (>= 5.1). This provides much less overhead compared to the usage of the pthreadpool for async io.

This module SHOULD be listed last in any module stack as it requires real kernel file descriptors.

EXAMPLES

Straight forward use:

        [cooldata]
        m[blue]path = /data/icem[]
        m[blue]vfs objects = io_uringm[]

OPTIONS

io_uring:num_entries = NUMBER_OF_QUEUE_ENTRIES

: The number of entries in the submission queue. The maximum allowed value depends on the kernel version and the kernel will roundup the value to a power of 2.
The default is '128'.

io_uring:sqpoll = BOOL

: Use the IORING_SETUP_SQPOLL feature.
The default is 'no'.

VERSION

This man page is part of version 4.14.2 of the Samba suite.

AUTHOR

The original Samba software and related utilities were created by Andrew Tridgell. Samba is now developed by the Samba Team as an Open Source project similar to the way the Linux kernel is developed.