03-15-2007
Windows is a collection of OS's and you can't really lump them together. XP has the NTFS filesystem which has rather powerful file permission capabilities. You can use a FAT filesystem with XP but Microsoft recommends ntfs. In my mind the glaring difference between Windows/Unix is that Unix is multi-user. Diff number 2 would be the XP GUI shell (explorer). Internally, unix has a monolithic kernel while XP has a microkernel (more or less). (Linux is also monolithic and this was the subject of a flamewar between Tovalds and Tennenbaum. Please remember our rules and do not start a flame war here. The thread will be quickly closed should that happen.) And a final large difference is the windows registry concept.
Your diagram does not strike me as correct. The shell should be a layer unto itself.
Swapping is moving entire processes into core or back to the swap area. At first Unix could swap but had no paging. After CPU's had MMU's paging became possible. Now unix pages all the the time and rarely swaps as a last resort. Some OS's (and I am thinking of HP-UX in particular) no longer swap at all. This leaves that swap area with a poor name! (Encrypted passwords have been removed from the password file too. Users rarely have home directories in /usr anymore. Unix has evolved a lot...)
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1. News, Links, Events and Announcements
Chapters on Linux and Unix:
http://www.prenhall.com/divisions/esm/app/author_tanenbaum/custom/mos2e/
Slides, figures, code, lots of goodies on-line!
CHAPTER 10 CASE STUDY 1: UNIX AND LINUX 671
10.1. HISTORY OF UNIX 672
10.1.1. UNICS 672
... (1 Reply)
Discussion started by: Neo
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2. Filesystems, Disks and Memory
We are currently running two servers each with remote file systems mounted on each other. They need upgrading from Solaris 2.6 to 8.
Does anyone know if there is a problem with having one server running Solaris 2.6 and the other v8?? Until we have time to upgrade them both. (2 Replies)
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3. UNIX for Advanced & Expert Users
I am interested in hearing anyones opinions on what OS they would choose to run a MySQl db and the reasons why, of course. I have a task to build a db server for a project that will be very busy if things work as the creative minds think that it will. I am running a FreeBSD box right now on... (0 Replies)
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4. UNIX for Advanced & Expert Users
Dear administrators I want to post the following question and, honestly, I don't know in which forum to post it since its general meaning.
my question is: Where the operating system are going?
Microkernel, monolithich or hybrid ?
Because this question involves more forums at the same but... (2 Replies)
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5. UNIX for Dummies Questions & Answers
Hi :)
I have unix Operating Systems 5
I need working for user logout befor 10 minutes,In the
case that he is not active :o
what do I do? :rolleyes: (4 Replies)
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Hello. I own a MacBook (black) running Leopard (Mac OS X 10.5.8), and I'm curious about a few things -- any help will be very, very much appreciated. I'm pretty much a newbie to Unix, although I have some very basic command-line skills with Mac OS X's Terminal. So while I know how to work the... (13 Replies)
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The assembly code generated by assembler, from a C-source code depends on the CPU architecture underlying it, eg x-86 . Then does the assembler output of a simple C-source code (containing common function-calls of both windows and linux) differ between Operating Systems ? (1 Reply)
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8. Google Chrome OS
we have
windows
linux- redhat ubuntu -or more i don't know
unix- solares
snow-lepord
and recently chrome
what do you think
well when i sow that all has extentions like exe -dsb i felt scared (1 Reply)
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LEARN ABOUT OPENDARWIN
dynamic_pager
dynamic_pager(8) BSD System Manager's Manual dynamic_pager(8)
NAME
dynamic_pager -- dynamic pager external storage manager
SYNOPSIS
dynamic_pager [-F filename] [-S filesize] [-H high-water-trigger] [-L low-water-trigger] [-P priority]
DESCRIPTION
The dynamic_pager daemon manages a pool of external swap files which the kernel uses to support demand paging. This pool is expanded with
new swap files as load on the system increases, and contracted when the swapping resources are no longer needed. The dynamic_pager daemon
also provides a notification service for those applications which wish to receive notices when the external paging pool expands or contracts.
OPTIONS
-F The base name of the filename to use for the external paging files. By default this is /private/var/vm/swapfile.
-S The fixed filesize [in bytes] to use for the paging files. By default dynamic_pager uses variable sized paging files, using larger
sized files as paging demands increase. The -S, -H and -L options disable that default and cause dynamic_pager to use a series of
fixed sized external paging files.
-H If there are less than high-water-trigger bytes free in the external paging files, the kernel will signal dynamic_pager to add a new
external paging file.
-L If there are more than low-water-trigger bytes free in the external paging files, the kernel will coalese in-use pages and signal
dynamic_pager to discard an external paging file. Low-water-trigger must be greater than high-water-trigger + filesize.
-P This option is currently unimplemented.
FILES
/private/var/vm/swapfile* Default external paging files.
SEE ALSO
macx_swapon(2), macx_swapoff(2).
Mac OS X July 8, 2003 Mac OS X