Steven Hartland
2016-Oct-20 16:17 UTC
zfs, a directory that used to hold lot of files and listing pause
Do you have atime enabled for the relevant volume?
If so disable it and see if that helps:
zfs set atime=off <volume>
Regards
Steve
On 20/10/2016 14:47, Eugene M. Zheganin wrote:> Hi.
>
> I have FreeBSD 10.2-STABLE r289293 (but I have observed this situation
> on different releases) and a zfs. I also have one directory that used
> to have a lot of (tens of thousands) files. I surely takes a lot of
> time to get a listing of it. But now I have 2 files and a couple of
> dozens directories in it (I sorted files into directories).
> Surprisingly, there's still a lag between "ls" and an output:
>
>
> ===Cut==>
> # /usr/bin/time -h ls
> .recycle 2016-01 2016-04 2016-07
> 2016-10 sort-files.sh
> 2014 2016-02 2016-05 2016-08
> ktrace.out sort-months.sh
> 2015 2016-03 2016-06 2016-09
> old sounds
> 5.75s real 0.00s user 0.02s sys
>
> ===Cut==>
>
> I've seen this situation before, on other servers, so it's not the
> first time I encounter this. However, it's not 100% reproducible (I
> mean, if I fill the directory with dozens of thousands of files, I
> will not certainly get this lag after the deletion).
>
> Has anyone seen this and does anyone know how to resolve this ? It's
> not critical issue, but it makes thing uncomfortable here. One method
> I'm aware of: you can move the contents of this directory to some
> other place, then delete it and create again. But it's kind of a nasty
> workaround.
>
>
> Thanks.
>
> Eugene.
>
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Eugene M. Zheganin
2016-Oct-21 03:52 UTC
zfs, a directory that used to hold lot of files and listing pause
Hi. On 20.10.2016 21:17, Steven Hartland wrote:> Do you have atime enabled for the relevant volume?I do.> > If so disable it and see if that helps: > zfs set atime=off <volume> >Nah, it doesn't help at all. Thanks. Eugene.