03-21-2011
Usage of prealloc command
hi
please tell me the usage of prealloc command.
10 More Discussions You Might Find Interesting
1. UNIX for Dummies Questions & Answers
Hi, i would like to determine how many shell scripts are in a directory. Someone recommended me the file command, but i don't know how to use it in that way.
anybody???
Thanks!!! (8 Replies)
Discussion started by: kfad
8 Replies
2. Shell Programming and Scripting
HI all,
I am wrkin on HP Unix .. can any1 let me know da usage of Touch command in shell scripting (1 Reply)
Discussion started by: ravi.sadani19
1 Replies
3. UNIX for Advanced & Expert Users
I usually ise find to search a file or name on the unix, since I am not administrator, there will be many line appear 'cannot access',usually a hundred of lines. How can I prevent this line coming out? only show I want?
The command I use is :
find / -name abcdef -print
Thank all expert. (1 Reply)
Discussion started by: zp523444
1 Replies
4. HP-UX
how can I find cpu usage memory usage swap usage and
I want to know CPU usage above X% and contiue Y times and memory usage above X % and contiue Y times
my final destination is monitor process
logical volume usage above X % and number of Logical voluage above
can I not to... (3 Replies)
Discussion started by: alert0919
3 Replies
5. AIX
How to monitor the IBM AIX server for I/O usage, memory usage, CPU usage, network usage, storage usage? (3 Replies)
Discussion started by: laknar
3 Replies
6. UNIX for Dummies Questions & Answers
Hi all,
Can you please tell me the command, with which one can know the amount of space a specific directory has used.
df -k . ---> Displays, the amount of space allocated, and used for a directory.
du -k <dir name> - gives me the memory used of all the files inside <dir>
But i... (2 Replies)
Discussion started by: abhisheksunkari
2 Replies
7. Shell Programming and Scripting
cut command usages ??
i have a file named test
contents :
srikanth hyd 123
vinoth chn 234
vijay chn 345
hemanth hyd 456
$cut -f2 test
should display:
hyd
chn
chn
hyd
but am gettg full file?? (2 Replies)
Discussion started by: Diddy
2 Replies
8. Shell Programming and Scripting
I am trying to output a log file from cp usage. I think this can be achieved. In my code I have this.
cp -i -v ~/files/* ~/backups/oldfiles/;; > ~/logs/logfile.logThe error I get is "syntax error near unexpected token '>'
What am I missing? (7 Replies)
Discussion started by: gameinn
7 Replies
9. UNIX for Dummies Questions & Answers
I have one file like this:
NEW
/ifs/SQL_Backups3/SQL_SharePoint1
NEW
/ifs/SQL_Backups/SQL_SharePointThis can be easily sorted by the following command:
cat file| sort -k3,3nBut I have another file like this:
/Pool0/local/Benchmark
/Pool0/local/CRAD
/Pool0/local/crdhw/espresso_scratch1... (5 Replies)
Discussion started by: newbie2010
5 Replies
10. UNIX for Dummies Questions & Answers
Hi,
Could you please let me know, why we should not use '.' in move command, if we use it, is it something wrong.. Please share the details on it.
/home/rahualux/emp.csv /home/rahualux/details/employee_files/.
Or other example for mutlipile files
/home/rahualux/*.csv... (3 Replies)
Discussion started by: rahualux
3 Replies
LEARN ABOUT CENTOS
vfs_prealloc
VFS_PREALLOC(8) System Administration tools VFS_PREALLOC(8)
NAME
vfs_prealloc - preallocate matching files to a predetermined size
SYNOPSIS
vfs objects = prealloc
DESCRIPTION
This VFS module is part of the samba(7) suite.
The vfs_prealloc VFS module preallocates files to a specified size each time a new file is created. This is useful in environments where
files are of a predetermined size will be written to a disk subsystem where extending file allocations is expensive.
This module is stackable.
OPTIONS
prealloc:EXT = BYTES
Preallocate all files with the extension EXT to the size specified by BYTES.
The following suffixes may be applied to BYTES:
o K - BYTES is a number of kilobytes
o M - BYTES is a number of megabytes
o G - BYTES is a number of gigabytes
EXAMPLES
A process writes TIFF files to a Samba share, and the is known these files will almost always be around 4 megabytes (4194304 bytes):
[frames]
path = /data/frames
vfs objects = prealloc
prealloc:tiff = 4M
CAVEATS
vfs_prealloc is not supported on all platforms and filesystems. Currently only XFS filesystems on Linux and IRIX are supported.
VERSION
This man page is correct for version 3.0.25 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_PREALLOC(8)