Test pool with 1 pg

[root@ceph1 ~]# ceph osd pool create test.pool 1 1 replicated replicated_host_nvme
[root@ceph1 ~]# ceph osd pool get test.pool pg_num
pg_num: 1
[root@ceph1 ~]# ceph osd pool get test.pool pgp_num
pgp_num: 1
[root@ceph1 ~]# ceph pg ls-by-pool test.pool
PG    OBJECTS  DEGRADED  MISPLACED  UNFOUND  BYTES  OMAP_BYTES*  OMAP_KEYS*  LOG  STATE         SINCE  VERSION  REPORTED  UP           ACTING       SCRUB_STAMP                      DEEP_SCRUB_STAMP
14.0        0         0          0        0      0            0           0    0  active+clean     5m      0'0  52831:12  [8,69,24]p8  [8,69,24]p8  2020-10-20T16:00:10.152988-0500  2020-10-20T16:00:10.152988-0500

* NOTE: Omap statistics are gathered during deep scrub and may be inaccurate soon afterwards depending on utilization. See http://docs.ceph.com/docs/master/dev/placement-group/#omap-statistics for further details.