Aw: Re: UBIFS: Is it possible to get the compressed size of a file?

[markus.heininger at online.de]

Hello,

in our system we´re using ring buffers where it is necessary to
remove old files from certain directories when the physical usage
of each directory is above a certain level which is different for each 
folder.

Evaluating the output of "df" after write access might be difficult
since there are several concurrent writing processes.

But many thanks for your answer, it seems that there is no easy
way to get the information needed and we must investigate further on
our own.

With best regards,
Markus

Gesendet: Mittwoch, 17. Dezember 2014 um 07:22 Uhr
Von: hujianyang <hujianyang at huawei.com>
An: "markus.heininger at online.de" <markus.heininger at online.de>
Cc: linux-mtd at lists.infradead.org, "Artem Bityutskiy" <dedekind1 at gmail.com>
Betreff: Re: UBIFS: Is it possible to get the compressed size of a file?
On 2014/12/12 16:10, markus.heininger at online.de wrote:
> Hello,
>
> when using compression along with UBIfs, fstat reports the uncompressed file size
> (as it should do). Is there a simple way to get the compressed file size, thus the real space
> a single file needs on the flash memory?

Why you need this?

I know *df* shows the space of a partition. Run *sync* after
a file created or appended, the space change of this partition
maybe could show you the compressed size of this file.

Is that enough for you?

>
> Many thanks,
> Markus
>