Would it be, by any chance, possible to tweak the thing so that reiserfs
plugins become kernel modules, so that the reiserfs core can be put in the
kernel without the plugins slowing down its acceptance ?
(and updating plugins without rebooting would be a nice extra)
The patch
I have made a little openoffice spreadsheet with the results.
You can have fun entering stuff and seeing the results.
http://peufeu.free.fr/compression.ods
Basically, a laptop having the same processor as my PC and a crummy 15
MB/s drive (like most laptop drives) will get a
Seperated FS and redundancy layers are an antiquated concept.. The
FS's job is to provide reliable storage, fully stop. It's shocking to
see that a dinosaur like SUN has figured this out but the free
software community still fights against it.
I so totally agree.
Some random
Do the file copying programs open their output files with
O_SEQUENTIAL ? If so, there is information to exploit...
You can change them to do so
I rather meant : if a program opens a file for write with O_SEQUENTIAL
(which should be done when copying files), will reiser4 exploit
This may have been mentioned before, but perhaps there could be a
trickle-out option along the lines of if the hard drive is idle (and
optionally only if it's spun up), slowly write out the changes to the
disk structure. This could also be paired with keeping as much of the
data in memory as
In the event of physical HD failure, the procedure goes like this:
Get mail saying a HDD is dead. Replace harddisk, resynchronize RAID.
Use Linux software RAID. Harddrives are cheaper that the time you'll lose
trying to recover your data.
I have reiserfs on RAID1 on my PC ; the
While I like the idea, the iram implementation is horrible for various
reasons :
- no ECC
- It uses SATA hence only a very little part of the RAM speed is used,
and large latencies are introduced.
- I wouldn't trust it for critical data.
Then, it would be faster to
Hehe. Wow. Sure, a benchmark that runs in 0.03 seconds for the fastest
one and 0.07 seconds for the slowest one looks pretty reliable to me. How
much time does it take to spawn the touch process 10k times ? Hm... I'd
guess most of the benchmark time ?
On Fri, 06 Jan 2006 19:10:47 +0100,
Just a few words about this slowdown thing.
I use linux-2.6.11-cko1-swsusp2 with reiser4 included. I won't upgrade to
a new version until Hans says the current one is at least as stable as it
was before starting the merge...
I get the slowdown once in a while, usually for 2-5
book/chapter[3]/paragraph[2]
I'd rather nitpick this to be :
book/chapters/3/paragraphs/2
simply because this makes little things like enumerating chapters,
paragraphs etc. easier (not having to do some sprintf(chapter%d,n)),
also all the items in the chapters/ are of the same type
Remember my message where I said reiser4 was preventing my laptop from
shutting down itself ?
Well it turned out that, in fact, it was a stupid shfs-mount process
which would refuse to die. Adding a killall ssh in the local.stop script
is a bit violent, but perfectly functional way, to
I do not know if a laptop battery running out behaves the same as a power
cord yanking, but this fact may be interesting :
As I was just reading some document, with no other activity, the
harddrive had spinned down since a while, and was NOT running (as in NOT
spinning) when the battery
Try a 2.6.12 or 2.6.13 kernel, without swsusp2 patches included (since
they don't work anyways, you shouldn't run a kernel with them in case
they do funky things). Maybe a recent -mm kernel?
OK, will try this ! thanks.
but nothiing relevant came out.
Thanks for your help.
On Tue, 18 Oct 2005 20:09:19 +0200, Alexander Zarochentsev
[EMAIL PROTECTED] wrote:
Hello,
On Monday 17 October 2005 22:56, PFC wrote:
I've been using Reiser4 on my laptop for a while and all I can say is,
well, that's the only
I've been using Reiser4 on my laptop for a while and all I can say is,
well, that's the only filesystem that makes a crap 5200rpm drive
responsive and usable. That's really great !
However, there are a few problems...
Sometimes, when I power down the laptop, the usual power down sequence
Why do you need separate ones? Having only a cryptcompress file plugin
you will be able
to create files which are either only encrypted or only compressed, just
set the transform
plugins properly.
It also make sense to have compression and crypto close to each other,
which lets the
An interesting idea: select the algo and a range of compression
levels per file,
A simple check on wether it's an already compressed file (using file
extension and magic number) should be quite easy to do and cheap.
Now, intrigued by this lzo thingie, I ran a little benchmark on my
I'm of the same opinion. If I have hardware that has a problem, and
causes downtime, it gets replaced or repaired. I don't switch to a
different piece of software to compensate for broken hardware.
With that said, I have seen ReiserFS expose hardware that had problems.
Hardware was
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.
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
250GB disk
Well, 250GB is the marketing capacity, the real formatted capacity is
always less (ask fdisk) also of course you have 1024 vs 1000
reiser4 reserves 5% of disk space for its internal needs.
So, do you mean this 5% is for metadata, and thus it would be used anyway
on any
Isn't this the RAM-based Prevalence ?
On Sat, 20 Aug 2005 11:58:59 +0200, Christian Iversen
[EMAIL PROTECTED] wrote:
On Saturday 20 August 2005 00:44, studdugie wrote:
MySQL is too slow for the task, even over localhost. I've benchmarked
it. Berkeley DB was 3x faster than MySQL for my
On Reiser4, I eperienced a really massive speedup when switching from
berkeley to plain filesystem on my subversion repository.
But this is on reiser4. Try it ;)
Also you can really easily defragment your reiserfs database-directory :
just tar and untar.
On Fri, 19 Aug 2005 23:49:40
Well, but then you have to tell postgres that it can assume these things
about reiser4.
you can already set the sync mode in the config file to a llot of
different choices, like fdatasync, fsync, O_SYNC, etc, so a reiser4 option
would be possibel I guess.
So for most webserver cases, FS speed doesn't matter. For the few
cases where it does, locality is usually fairly good... so who cares
if the new FS is 2x faster, when it is still 200x slower than ram. Add
ram.
But Reiser4 helps stuffing more files into the cache.
It also helps when
I just wanted to say thank you for putting together reiser4 :)
Same here. The first filesystem ever which makes a crummy laptop drive
look goo, and that's saying something.
If only it had a resizer :(
I would definitely give $25 for the repacker, which is the mandatory
condition to get the resizer. How many people would give $25 too ? why not
do a little fundraising ?
Drive A is a 500 gig striped RAID. Drive B is a 200 gig IDE drive. I
mv'ed all my data (about 100 gigs) from drive A to drive B. Drive B
then had its power plug fall out (don't ask me how I managed that), I
plugged it back in (stupid!) -- there was a spark -- drive B now won't
spin up, and
I have actually done this a couple of times with modern drives and found
it shockingly easy. You buy an identical drive, unscrew the board, and
screw the other board in, and it just works. The contacts are little
springs that connect correctly as long as the board is screwed on
If I did say I backed up 0x6ddd0 files in 8 minutes would he be happy ?
Most off topic thread of the year award.
But it's probably safe to say that outside of physics (and even there it
would
be odd), 123.456 is 1 dot 23456 * 10^5
Just a word about the testimonials page on the namesys.com site :
The LivingXML.net link points to a domain that doesn't exist...
You can use my testimonial if you like :
Since I've switched my laptop to reiser4, its crummy slow IDE drive
feels like it's got a rocket
I've got Gentoo and this is installed :
sys-fs/reiser4progs
Latest version available: 1.0.4
Latest version installed: 1.0.3
I believe the name of the tool has changed and is now resizefs.reiser4
A copy of the man page :
resizefs.reiser4(8)
In 1.0.3, I also had that manpage - but I had no binary. Do you
have a binary?
Looks like it is there :
nyuu root # grep resize /var/db/pkg/sys-fs/reiser4progs-1.0.3/CONTENTS
obj /usr/share/man/man8/resizefs.reiser4.8.gz
2142fde4cd6c41cfe319f34dd082c07c 1110658498
obj
[ebuild UD] sys-fs/reiser4progs-1.0.3 [1.0.4] -debug +readline
how do you obtain that information ?
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