reiser4 final - horror stories

neuron · Advocate Joined: 28 May 2002 Posts: 2371

anyone seen any yet? I kinda figured I'd see a few "it's fast but dont do XXX" fairly quickly, not that I'm paying attention, but does anyone have any horror stories on reiser4 final yet?

miseiler · Tux's lil' helper Joined: 17 Mar 2003 Posts: 118

Bigun · Advocate Joined: 21 Sep 2003 Posts: 2198

New filesystem?
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Nate_S · Guru Joined: 18 Mar 2004 Posts: 414

Suprisingly, as I've been casually following the reiser4 news, I have yet to see any reports of lost data. I have heard a few reports of crashes under load, or it not performing like it should, etc., but no lost data. (feel free to correct me if this is not the case)

miseiler · Tux's lil' helper Joined: 17 Mar 2003 Posts: 118

mmealman · Guru Joined: 02 Nov 2002 Posts: 348 Location: Florida

asimon · Posted: Fri Aug 27, 2004 6:11 pm Post subject:

I had a frozen rsync yesterday while rsyncing ~16 GB from one reiser4 partition to an other reiser4 partition. I was in single user mode and couldn't stop the process, hard disc activity was zero when I came back to the console and noticed the hanging rsync. After a rebooting no fs had errors but there where no files copied to the destination. I can't tell if it was reiser4's fault or rsync or the kernel or my bad karma.

Besides that I have reiser4 running on some non-critical data partitions where it is used for some heavy-duty compiling, no problems so far. But still I wait at least for two or three further bug-fix releases before I even play with the tought of using it for important data too.

neuron · Advocate Joined: 28 May 2002 Posts: 2371

syadnom · Guru Joined: 09 May 2002 Posts: 531

running reiser4 on my laptop. have been running pre-releases for sometime and moved up to file as soon as the patch for gentoo-dev-sources was out in the forums here.

i run gentoo-dev-sources-r3 right now with the reiser4 patch available right here in the forums and have had absolutely no problems.

did have a performance issue as i used the tar method to move my data off the drive and back on, the fix was to boot the reiser4 gentoo boot disk and copy the files from old directory to a new one so that reiser4 could reorder and repack the data for speed, then no problems.

works great, even when battery dies in middle of work, atomic filesystems rock!

Gandalf the White · Posted: Sun Aug 29, 2004 2:06 pm Post subject:

Well, yesterday I rebuilt my system from scratch, on a new reiser4 partition. Unfortunately Reedeman hasn't finished his newest and I couldn't wait, so I built it using 0.5.5 snapshot from June 23 I think. Anyway.... I was in love at first tar -xvjpf stage1........... Wow, this works great, my system is running faster and better than it ever has before. On reiser3 xmms used to choke if I had more than 3 things compiling at the same time, Yesterday I had 5 things compiling, listening to xmms, on top of plain xorg, and not a single choke. Anyone have any ideas how I could upgrade the reiser4 to the latest without reedeman's livecd?

will_in_wi · Tux's lil' helper Joined: 04 Feb 2004 Posts: 117

I switched the entire system over to reiser4 when it was released. Not a hiccup yet.

Robin79 · Posted: Sun Aug 29, 2004 3:02 pm Post subject:

Damm i just want to convert my old reiserfs3 to reiserfs4 but i cant i must format the disks

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Realmaker · Posted: Sun Aug 29, 2004 3:04 pm Post subject:

I'm just copying files to an old disk

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wdreinhart · Guru Joined: 11 Jun 2003 Posts: 569 Location: 4QFJ12345678

It's been working alright for me for the last 2 months now. There are a few "gotcha!" situations you need to watch for. First, you can't resize reiser4 filesystems yet. (Mr Reiser is hoping someone will pay him to implement this in the future) Second, current (post-1.0) versions of fsck.reiser4 don't recognize filesystems created with mkfs.reiser4 < 1.0. You'll have to use debugfs.reiser4 -C to update those filesystems to the new backup block format before you can fsck them again.

miseiler · Tux's lil' helper Joined: 17 Mar 2003 Posts: 118

syadnom · Guru Joined: 09 May 2002 Posts: 531

fyi,
for anyone with enough space OR an extra drive, DONT tar up your system. just use cp. this was reiser4 will realign and repack day and you can avoid the performance hit many people are experiencing with converted systems.

i just
mk /usr.new
cp -p /usr /usr.new

mv /usr /usr.old
mv /usr.new /usr

if you have any trouble,boot from a reiser4 enabled cd to do this.

-Sarbian- · n00b Joined: 22 May 2004 Posts: 18

Realmaker · Posted: Mon Aug 30, 2004 1:40 pm Post subject:

Is it possible to create a partition with an older version, install gentoo on it and convert it later to 1.0?
I don't want to wait for a new Redeeman live-cd

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RexM · Posted: Mon Aug 30, 2004 2:13 pm Post subject:

If somebody came out with a tool that would allow you to convert a reiserfs partition to a reiserfs4 partition... I might actually praise them and shower them with flowers and gifts.

syadnom · Guru Joined: 09 May 2002 Posts: 531

i filesystem conversion program would be iffy.

first, reiser4 partitions can't be resized(yet).
if they could, and the source filesystem could as well, then you could simply have a script resize the source filesystem to the smallest possible size, create a reiser4 partition and move files over, they resize the original again as the free space would now be available to shrink it more and the cycle continues.

OR

the partitions information could be stored into ram(or in a recovery files on the boot partition.)

a program could systematically cache data to ram starting and sector 0, erase the sector and start building a new reiser4 filesystem behind it. i think this would be dangeerous though.

CRV§ADER//KY · Guru Joined: 30 Aug 2004 Posts: 405 Location: Torino

wooooooo.......

I'm looking at the benchmarks right now....
http://www.namesys.com/benchmarks.html

ZERO performance loss when reading/writing on 8 simultaneous streams.....

I love it. :oops:

I'm definitely going to do it at least on my root partition within the next 3 months (while I'll wait at least 6 months to use it on my 100Gb-worth data partition.... :roll:

)
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yinyang · Posted: Mon Aug 30, 2004 7:29 pm Post subject:

It is surely worth of giving it a try, but I wouldn't believe a benchmark from the creator

Does anyone have any independent benchmarks?

Gentree · Posted: Tue Aug 31, 2004 7:36 am Post subject:

I have been using R4 since the begining of the year. Never had any problems.

I use it for portage (including portage_tmpdir where the compiling gets done) since it seems that R4 is strongest on large numbers of small files.

For a small number of large files (audio , video , cd images etc) xfs is probably a better choise.

Just do a search if you want some benchmarks.

HTH

@neuron
You may like to change the title of this thread, it unfairly gives the impression that there are substantial problems with R4. That is far from from what you are actually saying but it looks bad in the forum index.

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senzacionale · Guru Joined: 29 Jun 2004 Posts: 532 Location: Slovenia

i would like to know if reiser4 will be 100% compatitable with NTFS! Can we write on it without loosing any data!
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Gentree · Posted: Tue Aug 31, 2004 8:01 am Post subject:

Apparently there are issues with R4 and NFS (network file system) not to be confused with NTFS.

If you directly mount a windows NTFS partition under Linux it is the kernel that handles the file IO for that device and it should have no bearing on what other file systems you may or may not be using on other partitions.

HTH

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