05-04-2009
Thanks guys. I will try your advice and let you know.
10 More Discussions You Might Find Interesting
1. Filesystems, Disks and Memory
Could someone please explain to me the concept of INodes?
Colour me a DOS/MacOS junkie, but I don't quite understand.
Is there any relation to clusters, or physical distro.?
ty. (3 Replies)
Discussion started by: boris888
3 Replies
2. Solaris
Does anyone know what command I can run to check how many inodes are in use on a specific filesystem. On Data General servers I used to run the df -k command to check the status of the inodes for all file system.s (1 Reply)
Discussion started by: soliberus
1 Replies
3. Solaris
hi
i need to find all the files that r linked to the current file as i need to delete the file as well as few of its links :confused:
thnx in advance (1 Reply)
Discussion started by: livemyway
1 Replies
4. UNIX for Dummies Questions & Answers
how is the location of inodes in the physical disk.
are they sequential like:
bootblock|superblock|inode1|inode2| ....| datablock1|datablock2|datablock3
or are they distributed among data blocks like:
bootblock|superblock|inode1|datablock1|inode2|datablock2|datablock3|inode3
|datablock4 (3 Replies)
Discussion started by: gfhgfnhhn
3 Replies
5. Linux
Any good sites, tutorials that explain Inodes clearly and completely ? (3 Replies)
Discussion started by: nitin09
3 Replies
6. Solaris
Hello Experts
How can i know Number of used and free inodes in a file system?
thanx in advance.. (3 Replies)
Discussion started by: younus_syed
3 Replies
7. Filesystems, Disks and Memory
Hi, sorry to have written in other language i think i could do that.
I would to know
A file system use inodes indexed allocation as a method of allocating space.
In the inode blocks are 10 references to direct, 1 indirect reference to a single block, 1 block indirect reference to a reference to... (1 Reply)
Discussion started by: maryprin
1 Replies
8. Solaris
Dear Forum,
Please help me i have SUNW,Sun-Fire-V240 with sun solaris 8,if i check inode in /var like below:
# df -F ufs -o i
Filesystem iused ifree %iused Mounted on
/dev/md/dsk/d0 62354 310638 17% /
/dev/md/dsk/d3 372992 0 100% /var... (2 Replies)
Discussion started by: fredginting
2 Replies
9. UNIX for Advanced & Expert Users
How can i trace Inode structure and modify it in UNIX kernel?
We want to change the inode structure in the sense that we want to add a new field to the inode data structure. So we want to know how and where to trace inode (7 Replies)
Discussion started by: Group_Inode
7 Replies
10. Shell Programming and Scripting
Hi,
Is there a restriction in the number of inodes a particular directory can have in Solaris.
If so how can we determine that.
Regards (3 Replies)
Discussion started by: @bhi
3 Replies
LEARN ABOUT PHP
posix_madvise
POSIX_MADVISE(3) Linux Programmer's Manual POSIX_MADVISE(3)
NAME
posix_madvise - give advice about patterns of memory usage
SYNOPSIS
#include <sys/mman.h>
int posix_madvise(void *addr, size_t len, int advice);
Feature Test Macro Requirements for glibc (see feature_test_macros(7)):
posix_madvise():
_POSIX_C_SOURCE >= 200112L
DESCRIPTION
The posix_madvise() function allows an application to advise the system about its expected patterns of usage of memory in the address range
starting at addr and continuing for len bytes. The system is free to use this advice in order to improve the performance of memory
accesses (or to ignore the advice altogether), but calling posix_madvise() shall not affect the semantics of access to memory in the speci-
fied range.
The advice argument is one of the following:
POSIX_MADV_NORMAL
The application has no special advice regarding its memory usage patterns for the specified address range. This is the default
behavior.
POSIX_MADV_SEQUENTIAL
The application expects to access the specified address range sequentially, running from lower addresses to higher addresses.
Hence, pages in this region can be aggressively read ahead, and may be freed soon after they are accessed.
POSIX_MADV_RANDOM
The application expects to access the specified address range randomly. Thus, read ahead may be less useful than normally.
POSIX_MADV_WILLNEED
The application expects to access the specified address range in the near future. Thus, read ahead may be beneficial.
POSIX_MADV_DONTNEED
The application expects that it will not access the specified address range in the near future.
RETURN VALUE
On success, posix_madvise() returns 0. On failure, it returns a positive error number.
ERRORS
EINVAL addr is not a multiple of the system page size or len is negative.
EINVAL advice is invalid.
ENOMEM Addresses in the specified range are partially or completely outside the caller's address space.
VERSIONS
Support for posix_madvise() first appeared in glibc version 2.2.
CONFORMING TO
POSIX.1-2001.
NOTES
POSIX.1 permits an implementation to generate an error if len is 0. On Linux, specifying len as 0 is permitted (as a successful no-op).
In glibc, this function is implemented using madvise(2). However, since glibc 2.6, POSIX_MADV_DONTNEED is treated as a no-op, because the
corresponding madvise(2) value, MADV_DONTNEED, has destructive semantics.
SEE ALSO
madvise(2), posix_fadvise(2)
COLOPHON
This page is part of release 4.15 of the Linux man-pages project. A description of the project, information about reporting bugs, and the
latest version of this page, can be found at https://www.kernel.org/doc/man-pages/.
Linux 2017-09-15 POSIX_MADVISE(3)