VFS_FILEID(8) System Administration tools VFS_FILEID(8)NAME
vfs_fileid - Generates file_id structs with unique device id values for cluster setups
SYNOPSIS
vfs objects = fileid
DESCRIPTION
This VFS module is part of the samba(7) suite.
Samba uses file_id structs to uniquely identify files for locking purpose. By default the file_id contains the device and inode number
returned by the stat() system call. As the file_id is a unique identifier of a file, it must be the same on all nodes in a cluster setup.
This module overloads the SMB_VFS_FILE_ID_CREATE() operation and generates the device number based on the configured algorithm (see the
"fileid:algorithm" option).
OPTIONS
fileid:algorithm = ALGORITHM
Available algorithms are fsname and fsid. The default value is fsname.
The fsname algorithm generates device id by hashing the kernel device name.
The fsid algorithm generates the device id from the f_fsid returned from the statfs() syscall.
fileid:mapping = ALGORITHM
This option is the legacy version of the fileid:algorithm option, which was used in earlier versions of fileid mapping feature in
custom Samba 3.0 versions.
EXAMPLES
Usage of the fileid module with the fsid algorithm:
[global]
vfs objects = fileid
fileid:algorithm = fsid
VERSION
This man page is correct for version 3.2 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.
Samba 3.5 06/18/2010 VFS_FILEID(8)
Check Out this Related 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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