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)
Check Out this Related Man Page
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)
hello :-)
I have one problem with my LiLO... I installed PLD Linux on my computer but when it boots, the last thing I can see is:
request_module Root fs not mounted
VFS: Cannot open root device 03:01
Kernel panic: VFS: unable to mount root fs on 03:01
and the system stops :-(
what... (1 Reply)
Hi, all
What would be the a,b,c in troubleshooting slow performance on RH box, I type and it became really slow, what commands or log files to examine. What parameters to check?
Thanks all
T (2 Replies)
Hi,
I ported a file system from Kernel version 2.6.18.* to 2.6.32.46 as VFS implementation has changed and prepare_write/commit_write are replaced by write_begin/write_end pairs.
Implemented the feature by writing a wrapper for write_begin and write_end and calling original functions for... (0 Replies)
what is this error log = hda: irq timeout: error=0x00 and how to solve?
every day upon checking the logs i see this error.
hda: irq timeout: error=0x00
hda: irq timeout: error=0x00
hda: irq timeout: error=0x00
hda: irq timeout: error=0x00
hw_client: segfault at 0000000000000046 rip... (3 Replies)
Did anyone ever find the LAM module. Or did you have to get samba working with the provided pam module?
edit by bakunin: please create your own thread for your own question. We have no shortage on threads and we try not to mix up different problems. Thank you. (0 Replies)
Hi.
I'm starting to use minix and the version I'm using is 3.2.1. I didn't understand why in this version there are MFS/VFS/PFS file systems and in the other versions there is only FS. I'm trying to modify the file system but I don't know where should I modify. Does anyone know why are there... (0 Replies)