We have a single 27TB partition (35 x 1TB drives as RAID5+0 in an HP MDS600), just formatted it xfs and had no problems with it so far. It's used as scratch space so not too concerned about performance. --Russell > -----Original Message----- > From: centos-bounces at centos.org [mailto:centos-bounces at centos.org] On > Behalf Of Marian Marinov > Sent: Friday, 24 June 2011 7:48 a.m. > To: CentOS mailing list > Subject: Re: [CentOS] ext4 in CentOS 5.6? > > On Thursday 23 June 2011 22:31:28 PJ 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? > > Yes. At least it was so, last year. I haven't checked recently. And I > don't have a spare machine to repartition for the test. > We have a 30TB RAID6 array and I was really annoyed that I had to make > two partitions to utilze the whole space. > > The wiki pages are still not updated: > http://en.wikipedia.org/wiki/Comparison_of_file_systems > https://ext4.wiki.kernel.org/index.php/Ext4_Howto > > NOTE: Although very large fileystems are on ext4's feature list, > current e2fsprogs currently still limits the filesystem size to 2^32 > blocks (16TiB for a 4KiB block filesystem). Allowing filesystems larger > than 16T is one of the very next high-priority features to complete for > ext4. > > > > > _______________________________________________ > > CentOS mailing list > > CentOS at centos.org > > http://lists.centos.org/mailman/listinfo/centos > > -- > Best regards, > Marian Marinov ======================================================================= Attention: The information contained in this message and/or attachments from AgResearch Limited is intended only for the persons or entities to which it is addressed and may contain confidential and/or privileged material. Any review, retransmission, dissemination or other use of, or taking of any action in reliance upon, this information by persons or entities other than the intended recipients is prohibited by AgResearch Limited. If you have received this message in error, please notify the sender immediately. =======================================================================