defragmentation in linux

ramu_ak · 01-27-2004, 02:50 AM

hi everyone
i am doing some work in defragmentation of disks.. when i googled about this, i found out tht linux file systems does not need defragmentation tools in general...but the reason is not specified any where.. can i get the reason for not needing the tools for ext3 fs.

hoping for some help

bye
a linux lover

UltimaGuy · 01-27-2004, 03:09 AM

The linux file systems, like ext3, reiserfs etc., does not need defragmentations as they are different from FAT and NTFS. They do not fragment easily, and are self-correcting. They will themselves take care of fragments without user's intervention.

vectordrake · 01-27-2004, 07:15 AM

Quote:

Originally posted by UltimaGuy
The linux file systems, like ext3, reiserfs etc., does not need defragmentations as they are different from FAT and NTFS. They do not fragment easily, and are self-correcting. They will themselves take care of fragments without user's intervention.

That's one of the reasons that the journal is created, right?

UltimaGuy · 01-27-2004, 07:36 AM

No, I think the journal is created for consistency reasons. It is responsible for the consistency of the FS in case of powerbreaks, etc.,

Why, even ext2, which has no journal, didn't need a defragment!

michaelk · 01-27-2004, 07:46 AM

True it will reduce fragmentation but the main advantages are better support for large filesystems and much faster at recovering from power outages and OS crashes.

http://www.linux-mag.com/2002-10/jfs_01.html

Prognosis · 01-27-2004, 04:32 PM

It's all just one more reason to love Linux and hate Windows.

SciYro · 01-27-2004, 06:18 PM

wich reason is that? i think ill put it at like #1000