JFS in Gentoo

[UNIX4ALL]

Ahul !:

Well, Im writing this from a Gentoo box with JFS filesystem, It works very fine, this is really bleeding edge . Well, the steps for put JFS in your Gentoo box are simple.

1) Make the partitions with the installer of any distribution who supports JFS.
2) Reboot and start the Gentoo Installation
3) mount the partitions in /mnt/gentoo but with this mount -t jfs /dev/*** (where *** are yours partitions).
4) Install all normally.
5) In the step of the kernel configuration get the gentoo-sources and put JFS support IN THE KERNEL, not at module.
6) emerge jfsutils
7)In /etc/fstab in fs type put -> jfs
Install Grub or Lilo (I use lilo because grub doesn't see my hd )
9) Reboot and enjoy JFS Speed and Power .

Ar-Timirnit

[monotux]

is there any disadvantages with jfs?
I know there are a few things to have in mind while using XFS (like don't shut it down ^^). I have understood (aka. I read it in the gentoo installation guide ) that JFS is quite young, and not very tested - it it anything to use on a server, or should I stick to reiserfs or etx2/3?
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Computer science is no more about computers than astronomy is about telescopes.

[sca]

Well, it's not as mature as ReiserFS or XFS and doesn't support Quotas and Extended Attributes (but POSIX-ACLs).
I read that JFS is in average faster than ReiserFS (with big files >= 2GB) when writing and generally faster when reading.
But that's just one Benchmark, so don't kill me if I'm wrong
(Für Deutsche, der Test ist im 'Linux Magazin' 03/2004)

[ArtMotion]

For me, I will never install Reiserfs on any harddisk as long as I want that data to be safe!

I was running a small (1GB Ram, 2,4 GHz CPU) Linux Server, which had to run Oracle 10g database and Squid.

After doing some database benchmarks, the Oracle had never completed to full benchmark. First I believed it was the fault of the Oracle 10g database, since it is very new and Gentoo is not certified for it. Then I found a lot of vs-... errors in the dmesg output. After some googling I found out that this error is ReiserFS related and it is possible that the disk is damaged
Okay, bad day, but I couldn't believe that the system and the database disk should break at the same time. So I did "reiserfsck --fix-fixable" on all partitions.

Oh, Boy! Ext2 never had so many errors! The system was totally shit.

Okay, I reinstalled everything again from scratch. Again with ReiserFS. 1 week uptime. No reboots. No errors in dmesg -> rerun Oracle benchmark -> again doesn't complete. A look at dmesg showed again f#cking Reiserfs problem.

Reinstalled again everything with ext3. Did benchmark again. Completes. No troubles in dmesg.

Accidentily unplung powercable (uups). Server rebooted. Did Oracle benchmark again -> still works

So. If anybody says Shitfs, ehm Reiserfs, is mature or stable: haha. ext3 works at least. Not that the Oracle does something bad, as my configuration uses only datafiles (= big files, where Oracle works inside them).

That's why I also have my notebook running not anymore on Reiserfs but on XFS. After switching to XFS (full backup, format with XFS, restore, lilo) I also have 300 mb more free space (I was not using Reiserfs tailpacking, since this is an other topic of problems).

Then I switched my notebook also to ext3, since I feels a bit faster than xfs, at least for what I use my notebook.

[Dr Gonzo]

I've used ReiserFS since I've been using Linux, for over 2 years. I've never had a data corruption.

However, I have recently had some screwups with a JFS partition a couple of times. I had a problem with kernel panics, and my JFS partition would always be unmountable afterwards. Mount would just say that it was the wrong type of FS.

Ext3 is okay, but very slow compared to Reiserfs. BTW, I think that ReiserFS is really designed more for handling a lot of small files, not very large files. Don't really know, as I have no experience with Oracle.
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"Families is where our nation finds hope, where wings take dream."

George W. Bush

[Rhyotte]

Hello,
JFS has worked well for me for well over a year now. I have never had any problems with it and i have purposely Powered Down repeatedly just to punish it and see if it could bounce back gracefully as what i read about it. Also you may want to go to Shark Linux website they use JFS as their primary PRODUCTION file system for their distro. From what I have read they have some pretty serious server hardware configs running in full on production enviroments. One word of caution, as per one of the Developers of JFS make sure you are using JFSUTILS 1.1.6.

Peace
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Linux- A way of life!

[stahlsau]

hi,
i kept using JFS for the last few months without any problem. Reiser4 proved very slow for me, so i went to JFS; later /me was bored and changed to XFS, again w/o a hitch.
Only noticed that XFS and JFS are very fast compared to reiser3/4.

[hoschi]

i am using jfs, too
no problems now


i read also the test in the linux magazin 03/04 (german), their "result":

jfs = fastest
xfs = fast, less work for cpu
reiserfs = very fast with small data, but in average operations slower than xfs/jfs, higher cpu-usage
ext2/3 = erm, old....

why i use jfs:
hmmm, why not?
i have no 4kb data, i want a fast filesystem, i have fast cpu (3600+), i like ibm (ok, there was a dark area in the past), i dont like the name "reiserfs"
_________________
Just you and me strogg!

[kalisphoenix]

*giggles*

I was freaking out there, for a second.

"WTF! Gentoo removed JFS support?"

And then I read again and realized that the thread was started two years ago.

Man, these thread resurrections fsck with me.

[Gentree]

[Gentree]