08-09-2012
Files can have smaller sizes than their block usage. You can have a file that's 1 byte in size, even though it'd use at least one block. The extra space is simply reserve for it.
It's been given more than one block in case someone needs to extend the file later. Less fragmentation that way.
The file might also have been larger in the past.
10 More Discussions You Might Find Interesting
1. UNIX for Dummies Questions & Answers
Hi! I ran into a problem with a job I'm running. All it is doing is a "touch" on a filename. However, when I ran the job, it error'd out and got the message 'cannot stat'. When I restarted the job (making no changes) it worked just fine. Anyone know what this means? (1 Reply)
Discussion started by: lgardner
1 Replies
2. UNIX for Advanced & Expert Users
I'm not sure where to post this so I'll try it here.
I'm trying to load a software package to my server and I keep getting a cannot stat error. I'll post the error line below along with my configuartaion line. Can anyone help or point me in the right direction. Thanks!
This is the error.
... (1 Reply)
Discussion started by: Homer Allman
1 Replies
3. UNIX for Advanced & Expert Users
the output of stat command is
Size: 238 Blocks: 8 IO Block: 4096 regular file
Device: 80ah/2058d Inode: 736783 Links: 1
Access: (0664/-rw-rw-r--) Uid: ( 500/ gajju) Gid: ( 500/ gajju)
Access: 2008-09-08 20:00:15.000000000 +0530
Modify: 2008-09-08... (6 Replies)
Discussion started by: gajju
6 Replies
4. Programming
From reading various articles on the net, I know stat() is used on files to get things like permissions, sizes etc... As a folder is a special type of file in Unix, I assumed that stat() could work on it as well as any general file.
However, from running my program, perror() reported that the... (3 Replies)
Discussion started by: JamesGoh
3 Replies
5. Shell Programming and Scripting
I'm trying to find .tif files in a directory tree and rename them prior to zipping them and moving them to another dir. this is my code:
cd $TMPPATH
pwd
ctr=0
for i in 'find . -name "*.tif"'
do
let "ctr+=1"
newtifname=$DATEDIR"_"$SEQ"_"$ctr".tif"
mv "$i"... (6 Replies)
Discussion started by: rss0213
6 Replies
6. Shell Programming and Scripting
I have a string with escape differentiators as a result of searching for a file using find. Essentially find returned to my shell variable several absolute paths each ending with the file name and each path/file separated by \n.
Echo recognizes the escape sequence and is able to print the paths... (3 Replies)
Discussion started by: Ebodee
3 Replies
7. Shell Programming and Scripting
If i do ls -l i get the result rwx-rw-r ...... ............... file.
How can i get the result in octal format.
All other output will be the same as ls -l shows.
The rwx-rw-r would be like 755 etc. (7 Replies)
Discussion started by: cola
7 Replies
8. UNIX for Dummies Questions & Answers
i know this command does not exist in solaris. however, i read somewhere on this forum that basically everything the stat command provides in other oses can be obtained in solaris using the ls command.
i've searched the forum for a while now and i cant find the thread. does anyone know about... (1 Reply)
Discussion started by: SkySmart
1 Replies
9. Shell Programming and Scripting
Die to what all operations, the "Modify" and "Change" values of stat output changes for a file.
I found, during editing a file, Change and Modify alters. When chmod'ing Change alters, while Modify doesnot alters. Is there more situations where these changes? (1 Reply)
Discussion started by: anil510
1 Replies
10. Shell Programming and Scripting
Hi All,
I am getting the below error can anyone please help with this?
cp ${AI_SERIAL}/file_name ${AI_SERIAL_ARCH}/${ODATE}_file_name
cp: cannot stat `$AI_SERIAL/FILE_NAME': No such file or directory
+ gzip:$AI_SERIAL_ARCH./$ODATE_FILE_NAME
gzip:$AI_SERIAL_ARCH./$ODATE_FILE_NAME: No such... (2 Replies)
Discussion started by: bhanudhingra
2 Replies
LEARN ABOUT LINUX
e2freefrag
E2FREEFRAG(8) System Manager's Manual E2FREEFRAG(8)
NAME
e2freefrag - report free space fragmentation information
SYNOPSIS
e2freefrag [ -c chunk_kb ] [ -h ] filesys
DESCRIPTION
e2freefrag is used to report free space fragmentation on ext2/3/4 file systems. filesys is the filesystem device name (e.g. /dev/hdc1,
/dev/md0). The e2freefrag program will scan the block bitmap information to check how many free blocks are present as contiguous and
aligned free space. The percentage of contiguous free blocks of size and of alignment chunk_kb is reported. It also displays the mini-
mum/maximum/average free chunk size in the filesystem, along with a histogram of all free chunks. This information can be used to gauge
the level of free space fragmentation in the filesystem.
OPTIONS
-c chunk_kb
If a chunk size is specified, then e2freefrag will print how many free chunks of size chunk_kb are available in units of kilobytes
(Kb). The chunk size must be a power of two and be larger than filesystem block size.
-h Print the usage of the program.
EXAMPLE
# e2freefrag /dev/vgroot/lvhome
Device: /dev/vgroot/lvhome
Blocksize: 4096 bytes
Total blocks: 1504085
Free blocks: 292995 (19.5%)
Min. free extent: 4 KB
Max. free extent: 24008 KB
Avg. free extent: 252 KB
HISTOGRAM OF FREE EXTENT SIZES:
Extent Size Range : Free extents Free Blocks Percent
4K... 8K- : 704 704 0.2%
8K... 16K- : 810 1979 0.7%
16K... 32K- : 843 4467 1.5%
32K... 64K- : 579 6263 2.1%
64K... 128K- : 493 11067 3.8%
128K... 256K- : 394 18097 6.2%
256K... 512K- : 281 25477 8.7%
512K... 1024K- : 253 44914 15.3%
1M... 2M- : 143 51897 17.7%
2M... 4M- : 73 50683 17.3%
4M... 8M- : 37 52417 17.9%
8M... 16M- : 7 19028 6.5%
16M... 32M- : 1 6002 2.0%
AUTHOR
This version of e2freefrag was written by Rupesh Thakare, and modified by Andreas Dilger <adilger@sun.com>, and Kalpak Shah.
SEE ALSO
debugfs(8), dumpe2fs(8), e2fsck(8)
E2fsprogs version 1.41.14 December 2010 E2FREEFRAG(8)