Get the PG distribution per osd in command line :
pool : 0 1 2 3 | SUM
------------------------------------------------
osd.10 6 6 6 84 | 102
osd.11 7 6 6 76 | 95
osd.12 4 4 3 56 | 67
osd.20 5 5 5 107 | 122
osd.13 3 3 3 73 | 82
osd.21 9 10 10 110 | 139
osd.14 3 3 3 85 | 94
osd.15 6 6 6 87 | 105
osd.22 6 6 5 87 | 104
osd.23 10 10 10 87 | 117
osd.16 7 7 7 102 | 123
osd.17 5 5 5 99 | 114
osd.18 4 4 4 103 | 115
osd.19 7 7 7 112 | 133
osd.0 5 5 5 72 | 87
osd.1 5 5 6 83 | 99
osd.2 3 3 3 74 | 83
osd.3 5 5 5 61 | 76
osd.4 3 3 4 76 | 86
osd.5 5 5 5 78 | 93
osd.6 3 2 2 78 | 85
osd.7 3 3 3 88 | 97
osd.8 9 9 9 91 | 118
osd.9 5 6 6 79 | 96
------------------------------------------------
SUM : 128 128 128 2048 |
The command :
ceph pg dump | awk '
BEGIN { IGNORECASE = 1 }
/^PG_STAT/ { col=1; while($col!="UP") {col++}; col++ }
/^[0-9a-f]+\.[0-9a-f]+/ { match($0,/^[0-9a-f]+/); pool=substr($0, RSTART, RLENGTH); poollist[pool]=0;
up=$col; i=0; RSTART=0; RLENGTH=0; delete osds; while(match(up,/[0-9]+/)>0) { osds[++i]=substr(up,RSTART,RLENGTH); up = substr(up, RSTART+RLENGTH) }
for(i in osds) {array[osds[i],pool]++; osdlist[osds[i]];}
}
END {
printf("\n");
printf("pool :\t"); for (i in poollist) printf("%s\t",i); printf("| SUM \n");
for (i in poollist) printf("--------"); printf("----------------\n");
for (i in osdlist) { printf("osd.%i\t", i); sum=0;
for (j in poollist) { printf("%i\t", array[i,j]); sum+=array[i,j]; sumpool[j]+=array[i,j] }; printf("| %i\n",sum) }
for (i in poollist) printf("--------"); printf("----------------\n");
printf("SUM :\t"); for (i in poollist) printf("%s\t",sumpool[i]); printf("|\n");
}'
Copy-paste should work directly. The sum at bottom of the table must match to (pg_num x size).
You can find pg_num recommandations here : http://ceph.com/docs/master/rados/operations/placement-groups/
Also, a pg_num Calculator is avaible here : https://docs.ceph.com/en/latest/rados/operations/pgcalc/
To view the number of pg per osd : http://cephnotes.ksperis.com/blog/2015/02/23/get-the-number-of-placement-groups-per-osd/