Hi,
to check a current value use the following command on the machine where the OSD
you want to check is running
ceph daemon osd.{id} config show | grep {parameter}
Or
ceph daemon osd.{id} config get {parameter}
What you are seeing is actually a known glitch where you are being told it has
no effect when in fact it does. See capture below
[root@luminous ceph-deploy]# ceph daemon osd.0 config get osd_max_backfills
{
"osd_max_backfills": "1"
}
[root@luminous ceph-deploy]# ceph tell osd.* injectargs '--osd_max_backfills 2'
osd.0: osd_max_backfills = '2' rocksdb_separate_wal_dir = 'false' (not
observed, change may require restart)
osd.1: osd_max_backfills = '2' rocksdb_separate_wal_dir = 'false' (not
observed, change may require restart)
osd.2: osd_max_backfills = '2' rocksdb_separate_wal_dir = 'false' (not
observed, change may require restart)
[root@luminous ceph-deploy]# ceph daemon osd.0 config get osd_max_backfills
{
"osd_max_backfills": "2"
}
Regards
JC
> On Nov 21, 2017, at 15:17, Karun Josy <[email protected]> wrote:
>
> Hello,
>
> We added couple of OSDs to the cluster and the recovery is taking much time.
>
> So I tried to increase the osd_max_backfills value dynamically. But its
> saying the change may need restart.
>
> $ ceph tell osd.* injectargs '--osd-max-backfills 5'
> osd.0: osd_max_backfills = '5' osd_objectstore = 'bluestore' (not observed,
> change may require restart) rocksdb_separate_wal_dir = 'false' (not observed,
> change may require restart)
> ------------
> ------------
> =============
>
> The value seems to be not changed too.
>
> [cephuser@ceph-las-admin-a1 home]$ ceph -n osd.0 --show-config | grep
> osd_max_backfills
> osd_max_backfills = 1
>
> Do I have to really restart all the OSD daemons ?
>
>
>
> Karun
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