[ale] Linux 5.0 File-System Benchmarks: Btrfs vs. EXT4 vs. F2FS vs. XFS

[Beddingfield, Allen]

The "df" output is annoying, but I'm not sure why it would be a 
showstopper. It is easy enough to still make sense of.

I think it is just a matter of "df" being so old that it can't account 
for BtrFS.  Just because an old utility has trouble interpreting 
something written many years later, I'm not going to rule out the new 
thing. (This very argument got heated on the SUSE beta list for SLES 15 
about dropping ipconfig for the same reason - it is too old to interpret 
data accurately from all modern configs).

However, BtrFS introduces so much added complication and things that can 
go wrong that I use it very sparingly.  Even though it is the 
out-of-the-box default FS on SLES, I tend to use XFS for simplicity.
Allen B.

On 1/10/19 6:47 AM, Jim Kinney via Ale wrote:
> Inability to reduce xfs partition size is it's only problem. I've hit 
> size limit for ext4. The (newly realized for me) issue of df being 
> screwy with btrfs is a showstopper.
> 
> I've always mitigated performance issues with more spindles. Now it's 
> nvme for journals and cache.
> 
> At an oracle training (sales pitch), they showed specs on a specific 
> configuration with really good numbers. Basically indexes were stored on 
> raid1 nvme and data on spinning rust. Makes complicated joins screaming 
> fast. Postresql can do it too.
> 
> On January 9, 2019 8:56:30 PM EST, DJ-Pfulio via Ale <ale at ale.org> wrote:
> 
>     F2FS did well in that comparison. Surprising.
>     Been using ext4 for almost everything for years.  Sometimes being able
>     to reduce a file system is handy.
> 
>     When I learned that btrfs lied to df and du, I was out.
> 
>     On 1/9/19 8:41 PM, Raj Wurttemberg via Ale wrote:
> 
>         I saw that you all were talking about the BTRFS file system and
>         remembered
>         this article from a few days ago. I build and maintain large SAP
>         HANA
>         database servers (physical and virtual) so my only choice is the
>         XFS file
>         system which we have been quite happy with.
> 
>         Anyway... Interesting read.... :)
> 
>         Linux 5.0 File-System Benchmarks: Btrfs vs. EXT4 vs. F2FS vs. XFS
> 
>         https://www.phoronix.com/scan.php?page=article&item=linux-50-filesystems&num
>         =1
> 
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-- 
Allen Beddingfield
Systems Engineer
Office of Information Technology
The University of Alabama
Office 205-348-2251
allen at ua.edu