12-07-2011
Definition I found with Google:
Internal Fragmentation is the term used to describe disk space which is allocated to a file but unused because the file is smaller than the allocated space.
As you again omit to mention what Operating System and version you have, and what Filesystem Type you have (e.g. UFS, VxFS , whatever) all answers can only be general.
Comparing the output from "du -s" with the total of the sizes of the files as reported by "ls -la" demonstrates the discrepancy.
Proprietary software may well provide better tools. Depends what you have.
It's a real problem on Windows systems with large discs and large numbers of small files. A disc upgrade can actually reduce the amount of free space!
10 More Discussions You Might Find Interesting
1. IP Networking
HI all,
I am in urgent need of this answer.
In TCP/IP protocol, If the IP datagram size > MTU of the any
routing network then the IP fragmentation takes place!
Where exactly the Fragmentation takes place? is it at the source network layer or in between at some router?
If so, which of the... (1 Reply)
Discussion started by: reddyb
1 Replies
2. Shell Programming and Scripting
Hi,
I have written one script to calculate total space of all file in one directory, ignoring subdirectory, it works fine.
Now, I've been trying to calculate all files which includes files in any subdirectories.
I use recursive function to do this, but it can work only if there is only one... (4 Replies)
Discussion started by: KLL
4 Replies
3. UNIX for Dummies Questions & Answers
Hi,
Please let me know more details on fragmentation in redhat linux and command to check fragmented files?
Thanks,
Bache Gowda (2 Replies)
Discussion started by: bache_gowda
2 Replies
4. Solaris
All.
How can i calculate the fragmentation ratio on a mounted disk, given that i have no root privilege and i cannot switch to single user mode. (0 Replies)
Discussion started by: Negm
0 Replies
5. UNIX for Dummies Questions & Answers
I need to calcualte the size of a directory by the year the files in that directory were created .
For example the script will sum up, by year, the number of blocks for that directory and its' subdirectories for files created / accessed in that year.
I need a report that would look like... (11 Replies)
Discussion started by: igidttam
11 Replies
6. UNIX for Advanced & Expert Users
Hi,
I need to redirect internal internet requests to a auth client site siting on the gateway. Currently users that are authenticated to access the internet have there mac address listed in the FORWARD chain. All other users need to be redirected to a internal site for authentication.
Can... (1 Reply)
Discussion started by: mshindo
1 Replies
7. Shell Programming and Scripting
Hello,
I'm new member of shell scripting and i face some difficulties. To begin, i try to write an algorithm that calculate from one directory containing nfdump files (288) the entropy of one day 24hours. Each of the file is 5 min interval
(nfdump -r nfcapd.200908250000 -s srcip) 1st
(nfdump... (0 Replies)
Discussion started by: draxmas
0 Replies
8. Shell Programming and Scripting
Hello :
I need some help in writing a ksh script which will find a particular directory in all the file systems in a server and finally report the total size of the direcotry in all the file systems.
Some thing like this..
find /u*/app/oracle -type d -name "product" -prune
and then... (1 Reply)
Discussion started by: Sam1974
1 Replies
9. IP Networking
Hello all, I am experiencing a problem with IP fragmentation.
I am receiving an udp packet that is larger than the MTU and it is fragmented along the network.
I am receiving the two fragments but they are not being reassembled correclty.
The MTU of the system is 1500 and I cannot increase it,... (2 Replies)
Discussion started by: arichard
2 Replies
10. Shell Programming and Scripting
I am trying to use awk to calculate the average of all lines in $2 for every file in a directory. The below bash seems to do that, but I cannot figure out how to capture the string before the _ as the output file name and have it be tab-delimeted. Thank you :).
Filenames in... (3 Replies)
Discussion started by: cmccabe
3 Replies
df(1B) SunOS/BSD Compatibility Package Commands df(1B)
NAME
df - display status of disk space on file systems
SYNOPSIS
/usr/ucb/df [-a] [-i] [-t type] [filesystem...] [filename...]
DESCRIPTION
The df utility displays the amount of disk space occupied by currently mounted file systems, the amount of used and available space, and
how much of the file system's total capacity has been used.
If arguments to df are path names, df produces a report on the file system containing the named file. Thus `df .' shows the amount of
space on the file system containing the current directory.
OPTIONS
The following options are supported:
-a Report on all filesystems including the uninteresting ones which have zero total blocks (that is, auto-mounter).
-i Report the number of used and free inodes. Print ` * ' if no information is available.
-t type Report on filesystems of a given type (for example, nfs or ufs).
EXAMPLES
Example 1: Using df
A sample of output for df looks like:
example% df
Filesystem kbytes used avail capacity Mounted on
sparky:/ 7445 4714 1986 70% /
sparky:/usr 42277 35291 2758 93% /usr
Note that used+avail is less than the amount of space in the file system (kbytes); this is because the system reserves a fraction of the
space in the file system to allow its file system allocation routines to work well. The amount reserved is typically about 10%; this can be
adjusted using tunefs (see tunefs(1M)). When all the space on a file system except for this reserve is in use, only the super-user can
allocate new files and data blocks to existing files. When a file system is overallocated in this way, df can report that the file system
is more than 100% utilized.
FILES
/etc/mnttab List of file systems currently mounted
/etc/vfstab List of default parameters for each file system
ATTRIBUTES
See attributes(5) for descriptions of the following attributes:
+-----------------------------+-----------------------------+
| ATTRIBUTE TYPE | ATTRIBUTE VALUE |
+-----------------------------+-----------------------------+
|Availability |SUNWscpu |
+-----------------------------+-----------------------------+
SEE ALSO
du(1), quot(1M), tunefs(1M), mnttab(4), attributes(5)
SunOS 5.10 14 Sep 1992 df(1B)