[CentOS] Is ext4 safe for a production server?

Jure Pečar pegasus at nerv.eu.org
Sat Dec 5 20:37:56 UTC 2009

On Sat, 05 Dec 2009 10:48:56 -0800
John R Pierce <pierce at hogranch.com> wrote:

> Timo Schoeler wrote:
> > For enterprise environments my favorite FS is XFS, YMMV, though.
> >   
> I've always avoided XFS because A) it wsan't supported natively in RHEL 
> anyways, and B) I've heard far too many stories about catastrophic loss 
> problems and day long FSCK sessions after power failures [1] or what 
> have you
> is B) no longer an issue?

You get horror stories about anything, depending on which people you ask.
For example, where reiserfs was supposed to eat data left and right some
years ago, I had 6 data losing crashes on ext3 and 0 with reiserfs. On same
machine, same disks, so same conditions. Go figure.

> I wanna know how come JFS/JFS2 (originally from IBM) isn't more popular 
> in the linux world?  At least as implemented in AIX, its rock stable, 
> journaling, excellent performance, and handles both huge files and lots 
> of tiny files without blinking.   jfs2 handles really huge file systems, 
> too.  I really like how, in AIX, the VM and FS tools are coordinated, so 
> expanding and reorganizing file systems is trivial, nearly as simple as 
> Sun's ZFS.

AFAIK AIX JFS != Linux JFS. It's more like OS/2 JFS and IBM
ported it to linux to enable their os/2 customers to move to linux.

Also whenever fs reliability discussion pops up I like to point people to
this paper: http://www.cs.wisc.edu/wind/Publications/iron-sosp05.pdf
Tables on page 8 are most amusing.
Also shows which filesystems were developed in an academic world and which
were engineered in a real world ;)


Jure Pečar

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