09-21-2010
9 More Discussions You Might Find Interesting
1. Filesystems, Disks and Memory
I have some questions regarding disk perfomance, and what I can do to make it just a little (or much :)) more faster.
From what I've heard the first partitions will be faster than the later ones because tracks at the outer edges of a hard drive platter simply moves faster. But I've also read in... (4 Replies)
Discussion started by: J.P
4 Replies
2. AIX
Can I change any AIX System paramerter for speeding the data Disk performance?
Currently it slows with writing operations. (1 Reply)
Discussion started by: gogogo
1 Replies
3. AIX
Hello,
I have a aix 570 system with san disk. I do write test of performance
in a lv with four disk. While the test I run filemon tools for trace
the disk activity. The outputs of filemon are at the en of this message. I
see my lV(logical volume) throughput at 100 meg by second. 2 of 4
disk... (0 Replies)
Discussion started by: Hugues
0 Replies
4. AIX
I'm search for a disk exerciser / load tool like iometer, iozone, diskx for IBM AIX 5.2 and 5.3
Because of a very bad disk performance on several AIX systems, I need to have a tool which is able to generate a disk load on my local and SAN disks.
Does somebody knows a kind of tool which is... (5 Replies)
Discussion started by: funsje
5 Replies
5. Red Hat
I am getting absolutely dreadful iowait stats on my disks when I am trying to install some applications.
I have 2 physical disks on which I have created 2 separate logical volume groups and a logical volume in each. I have dumped some stats as below
My dual core CPU is not being over utilised... (3 Replies)
Discussion started by: jimthompson
3 Replies
6. Solaris
Dear All,
I have a hard disk in solaris on which the write performanc is too slow.
The CPU , RAM memory are absolutely fine.
What might be reason.
Kindly explain.
Rj (9 Replies)
Discussion started by: jegaraman
9 Replies
7. Solaris
What tools/utilities do you use to generate metrics on disk i/o throughput on Solaris. For example, if I want to see the i/o rate of random or sequential r/w. (2 Replies)
Discussion started by: dangral
2 Replies
8. Solaris
Hello,
we have a machine with Solaris Express 11, 2 LSI 9211 8i SAS 2 controllers (multipath to disks), multiport backplane, 16 Seagate Cheetah 15K RPM disks.
Each disk has a sequential performance of 220/230 MB/s and in fact if I do a
dd if=/dev/zero of=/dev/rdsk/<diskID_1> bs=1024k... (1 Reply)
Discussion started by: golemico
1 Replies
9. Linux
I have a freshly installed Oracle Linux 7.1 ( akin to RHEL ) server.
However after installing some Oracle software, I have noticed that my hard disk light is continually on and the system performance is slow.
So I check out SAR and IOSTAT
lab3:/root>iostat
Linux... (2 Replies)
Discussion started by: jimthompson
2 Replies
LEARN ABOUT PHP
php_uname
PHP_UNAME(3) 1 PHP_UNAME(3)
php_uname - Returns information about the operating system PHP is running on
SYNOPSIS
string php_uname ([string $mode = "a"])
DESCRIPTION
php_uname(3) returns a description of the operating system PHP is running on. This is the same string you see at the very top of the
phpinfo(3) output. For the name of just the operating system, consider using the PHP_OS constant, but keep in mind this constant will con-
tain the operating system PHP was built on.
On some older UNIX platforms, it may not be able to determine the current OS information in which case it will revert to displaying the OS
PHP was built on. This will only happen if your uname() library call either doesn't exist or doesn't work.
PARAMETERS
o $mode
-$mode is a single character that defines what information is returned:
o 'a': This is the default. Contains all modes in the sequence "s n r v m".
o 's': Operating system name. eg. FreeBSD.
o 'n': Host name. eg. localhost.example.com.
o 'r': Release name. eg. 5.1.2-RELEASE.
o 'v': Version information. Varies a lot between operating systems.
o 'm': Machine type. eg. i386.
RETURN VALUES
Returns the description, as a string.
EXAMPLES
Example #1
Some php_uname(3) examples
<?php
echo php_uname();
echo PHP_OS;
/* Some possible outputs:
Linux localhost 2.4.21-0.13mdk #1 Fri Mar 14 15:08:06 EST 2003 i686
Linux
FreeBSD localhost 3.2-RELEASE #15: Mon Dec 17 08:46:02 GMT 2001
FreeBSD
Windows NT XN1 5.1 build 2600
WINNT
*/
if (strtoupper(substr(PHP_OS, 0, 3)) === 'WIN') {
echo 'This is a server using Windows!';
} else {
echo 'This is a server not using Windows!';
}
?>
There are also some related Predefined PHP constants that may come in handy, for example:
Example #2
A few OS related constant examples
<?php
// *nix
echo DIRECTORY_SEPARATOR; // /
echo PHP_SHLIB_SUFFIX; // so
echo PATH_SEPARATOR; // :
// Win*
echo DIRECTORY_SEPARATOR; //
echo PHP_SHLIB_SUFFIX; // dll
echo PATH_SEPARATOR; // ;
?>
SEE ALSO
phpversion(3), php_sapi_name(3), phpinfo(3).
PHP Documentation Group PHP_UNAME(3)