Re: Confusing output from fi us/df

[Hans van Kranenburg <hans.van.kranenburg@mendix.com>]

Hi,

On 06/21/2016 01:30 AM, Marc Grondin wrote:
>
> I have a btrfs filesystem ontop of a 4x1tb mdraid raid5 array and I've
> been getting confusing output on metadata usage. Seems that even tho
> both data and metadata are in single profile metadata is reporting
> double the space(as if it was in dupe profile)

I guess that's a coincidence.

 From the total amount of space you have (on top of the mdraid), there's 
3 GiB allocated/reserved for use as metadata. Inside that 3 GiB, 1.53GiB 
of actual metadata is present.

>[...]
> Metadata,single: Size:3.00GiB, Used:1.53GiB
> /dev/mapper/storage2 3.00GiB

> Metadata, single: total=3.00GiB, used=1.53GiB

If you'd change to DUP, it would look like:

for fi usage:

Metadata,single: Size:3.00GiB, Used:1.53GiB
/dev/mapper/storage2 6.00GiB

for fi df:

Metadata, single: total=3.00GiB, used=1.53GiB

Except for the 6.00GiB which would show the actual usage on disk, the 
other metadata numbers all hide the profile ratio.

Hans