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vfs_time_audit(8) [centos man page]

VFS_TIME_AUDIT(8)					    System Administration tools 					 VFS_TIME_AUDIT(8)

NAME
vfs_time_audit - samba vfs module to log slow VFS operations SYNOPSIS
vfs objects = time_audit DESCRIPTION
This VFS module is part of the samba(7) suite. The time_audit VFS module logs system calls that take longer than the number of milliseconds defined by the variable time_audit:timeout. It will log the calls and the time spent in it. It's kind of comparable with strace -T and is helpful to reveal performance problems with the underlying file and storage subsystems. This module is stackable. OPTIONS
time_audit:timeout = number of milliseconds VFS calls that take longer than the defined number of milliseconds that should be logged. The default is 10000 (10s). EXAMPLES
This would log VFS calls that take longer than 3 seconds: [sample_share] path = /test/sample_share vfs objects = time_audit time_audit:timeout = 3000 VERSION
This man page is correct for version 4.0.0 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. The time_audit VFS module was created with contributions from Abhidnya Chirmule. Samba 4.0 06/17/2014 VFS_TIME_AUDIT(8)

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VFS_AIO_FORK(8) 					    System Administration tools 					   VFS_AIO_FORK(8)

NAME
vfs_aio_fork - implement async I/O in Samba vfs SYNOPSIS
vfs objects = aio_fork DESCRIPTION
This VFS module is part of the samba(7) suite. 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. EXAMPLES
Straight forward use: [cooldata] path = /data/ice vfs objects = aio_fork VERSION
This man page is correct for version 4.0.0 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. Samba 4.0 06/17/2014 VFS_AIO_FORK(8)
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