vfs_aio_fork - implement async I/O in Samba vfs
vfs objects =
This VFS module is part of the samba
The aio_fork VFS module enables async I/O for Samba on platforms where the
system level Posix AIO interface is insufficient. Posix AIO can suffer from
severe limitations. For example, on some Linux versions the real-time signals
that it uses are broken under heavy load. Other systems only allow AIO when
special kernel modules are loaded or only allow a certain system-wide amount
of async requests being scheduled. Systems based on glibc (most Linux systems)
only allow a single outstanding request per file descriptor.
To work around all these limitations, the aio_fork module was written. It uses
forked helper processes instead of the internal Posix AIO interface to create
asynchronousity for read and write calls. It has no parameters, it will create
helper processes when async requests come in as needed. Idle helper processes
will be removed every 30 seconds.
This module is stackable.
Straight forward use:
path = /data/ice
vfs objects = aio_fork
This man page is correct for version 4.0.0 of the Samba suite.
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.