> On 22/01/2021 20:29 Ron Garret <r...@flownet.com> wrote:
> 
>  
> On Jan 22, 2021, at 10:05 AM, @lbutlr <krem...@kreme.com> wrote:
> 
> > On 22 Jan 2021, at 09:07, Ron Garret (gmail) <ron.gar...@gmail.com> wrote:
> >> On Jan 22, 2021, at 8:02 AM, @lbutlr <krem...@kreme.com> wrote:
> >> 
> >>> On 21 Jan 2021, at 18:08, MRob <mro...@insiberia.net> wrote:
> >>>> Hello,
> >>>> I just found user who has single folder (standard maildir format) that 
> >>>> filled with over 8mil files and 800GB in the /tmp subdirectory of that 
> >>>> folder:
> >>> 
> >>> Are they real files or hard links?
> >> 
> >> How would you distinguish a hard link from a “real file”?
> > 
> > ls -l will show the number of hard links to a file in the first column 
> > after the permissions (or it showed the number off files (including . and 
> > ..) inside a directory if it's a directory entry).
> 
> Ah, I misinterpreted the question then.  You meant (I presume) “Are they 8 
> million distinct files, or 8 million hard links to a (much) smaller number of 
> actual underlying inodes.”
> 
> So then my next question is (and I’m not intending to challenge you here, I’m 
> just trying to get a better understanding of how dovecot works under the 
> hood): where would these hard links come from?  What does dovecot use hard 
> links for?
> 
> rg

There should not be any files under /tmp normally. If there are, you can look 
at what they are, and decide whether to rm them or move them under /new.

Maildir delivery says that you first write the file under /tmp and then 
link-unlink the file into /new.

Aki

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