Re: Restart is required?

[Jaroslaw Owsiewski <jaroslaw.owsiewski@xxxxxxxxxxxxxxxx>]

Thanks for your reply and information. Yes, we are using filestore. Will it still work in Luminous: ?? 

http://docs.ceph.com/docs/master/rados/configuration/filestore-config-ref/ :

"filestore merge threshold

Description:	Min number of files in a subdir before merging into parent NOTE: A negative value means to disable subdir merging

"

will variable definition like "filestore_merge_treshold = -50" (negative value) work? (in Jewel it worked like a charm)

Regards

-- 

Jarek

-- 

Jarosław Owsiewski

2017-11-16 16:47 GMT+01:00 David Turner <drakonstein@xxxxxxxxx>:

The filestore_split_multiple command does indeed need a restart of the OSD daemon to take effect.  Same with the filestore_merge_threshold.  These settings also only affect filestore.  If you're using bluestore, then they don't mean anything.

You can utilize the ceph-objectstore-tool to split subfolders while the OSD is offline as well.  I use the following command to split the subfolders on my clusters while the OSDs on a node are offline.  It should grab all of your OSDs on a node and split their subfolders to match the settings in the ceph.conf file.  Make sure you understand what the commands do and test them in your environment before running this (or your personalized version of it).

ceph osd set noout

sudo systemctl stop ceph-osd.target

for osd in $(mount | grep -Eo ceph-[0-9]+ | cut -d- -f2 | sort -nu); do

  for run_in_background in true; do

    echo "Starting osd $osd"

    sudo -u ceph ceph-osd --flush-journal -i=${osd}

    for pool in $(ceph osd lspools | gawk 'BEGIN {RS=","} {print $2}'); do

      sudo -u ceph ceph-objectstore-tool --data-path /var/lib/ceph/osd/ceph-${osd} \

        --journal-path /var/lib/ceph/osd/ceph-${osd}/journal \

        --log-file=/var/log/ceph/objectstore_tool.${osd}.log \

        --op apply-layout-settings \

        --pool $pool \

        --debug

    done

    echo "Finished osd.${osd}"

    sudo systemctl start ceph-osd@$osd.service

  done &

done

wait

sudo systemctl start ceph-osd.target

On Thu, Nov 16, 2017 at 9:19 AM Piotr Dałek <piotr.dalek@xxxxxxxxxxxx> wrote:

On 17-11-16 02:44 PM, Jaroslaw Owsiewski wrote:
> HI,
>
> what exactly means message:
>
> filestore_split_multiple = '24' (not observed, change may require restart)
>
> This has happend after command:
>
> # ceph tell osd.0 injectargs '--filestore-split-multiple 24'

It means that "filestore split multiple" is not observed for runtime
changes, meaning that new value will be stored in osd.0 process memory, but
not used at all.

> Do I really need to restart OSD to make changes to take effect?
>
> ceph version 12.2.1 () luminous (stable)

Yes.

--
Piotr Dałek
piotr.dalek@xxxxxxxxxxxx
https://www.ovh.com/us/
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