Re: journal size reiserfs vs reiser4

[michael chang <thenewme91@gmail.com>]

On 9/2/05, PFC <lists@boutiquenumerique.com> wrote:
> 
> > It could probably be a lot less than 5%, 2% is more than enough I would
> > guess, but we also need to reserve space to get good performance.

Maybe 2% would be necessary for the delete operations -- the rest is
to prevent fragmentation (like I said) and various other tidbits. 
Simply, if df reports more than 85% full, generally people believe
that performance will go down (that space is unused, regardless). 
It'd be interesting for an optimized read-write fileystem with
repacker (not necessarily online) that still has excellent performance
even at 95-97% full.

>         I'm more than happy to lose 3 GB on my 60 gb /  5400 rpm crap laptop
> drive and have reiser4 transform it into something that feels more like a
> big f*king raptor. Everytime I boot into Windows I feel the burning pain
> of this crap drive combined with the cancer of NTFS. Uh-oh this file takes

Try emptying your prefetch, and see if that helps... defragmentation
won't work unless you have enough contiguous space for all of your
fragmented files.  Totally unlikely.  And Windows takes *forever* to
repack free space, and even then it doesn't do so solidly (if you have
barely enough space to defragment e.g. one file).

> long to load OH CRAP it's fragmented in 20000 bits (my personal record !).
> Gee. Gotta. Defrag. Again.

I've defragmented for 24-48 hours straight (repetated cycles) in
proprietary and built-in defragmenters -- and still it wouldn't
defragment even one or two of my largest, and most fragmented files (I
believe it's about 275 MB video file in 30000-40000 pieces).  Still'd
love to boot Windows off a Reiser4 partition...

>         Note that on your average Linux system with a zillion of small files the
> efficient reiser4 packing will save a lot of space.

Yes.

>         Un-tar the freedb database on a NTFS (or EXT3) partition and witness how
> your machine dies, then stop complaining about reiser4 eating 5% of your
> space dammit.

As soon as I can install root reiser4 and get repacker/resizer -- I'm
patient though. ^^

-- 
~Mike
 - Just my two cents
 - No man is an island, and no man is unable.