[CentOS] ext4 in CentOS 5.6?

[Marian Marinov]

On Thursday 23 June 2011 22:41:50 PJ wrote:
> On Thu, Jun 23, 2011 at 12:31 PM, PJ <pauljerome at gmail.com> wrote:
> > On Thu, Jun 23, 2011 at 1:07 PM, Marian Marinov <mm at yuhu.biz> wrote:
> >> On Thursday 23 June 2011 19:16:37 PJ wrote:
> >>> I'm sure many are running ext4 FS's in production, but just want to be
> >>> re-assured that there are not currently any major issues before
> >>> starting a new project that looks like it will be using ext4.
> >>> 
> >>> I've previously been using xfs but the software for this project
> >>> requires ext3/ext4.
> >>> 
> >>> I'm always very cautious before jumping onto a new FS, (new in the
> >>> sense it is officially supported now)
> >>> 
> >>> Thanks in advance!
> >> 
> >> I'm running some 50 servers with ext4 each server has 2x15TB ext4
> >> partitions. I haven't had an issue with that setup. The first server
> >> was setup 3 years ago. It is quite faster then XFS in terms of write
> >> performance and thus far reliable without any major problem.
> >> 
> >> Keep in mind that user land tools are limited and the biggest partition
> >> you can create with them at the moment is 16TB. You can recompile the
> >> tools and remove this limitation if that is a problem for you.
> >> 
> >> Regards,
> >> Marian Marinov
> > 
> > Thanks for all the great replies everyone.
> > 
> > I've got an 18TB partition - the limit is 16TB even in x86_64?
> 
> Answering my own question yes, 16TB is the limit.
> Has anyone here successfully compiled their own version of e2fsprogs
> that works over 16TB?
> 
> Looking at https://ext4.wiki.kernel.org/index.php/Ext4_Howto it says:
> "The code to create file systems bigger than 16 TiB is, at the time of
> writing this article, not in any stable release of e2fsprogs. It will
> be in future releases."
> 
> Not sure if the wiki is out of date or not...

What I have seen is only a alpha/beta quality code that adds this 
functionality.

I would not suggest that you use those patches. At least not on a production 
machine. I only wanted to mention that there is such code... not that it is 
actually working :)

Marian
> 
> Thanks!
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