i want change the omapval of a rbd size so i do some thing like :
1、create a rbd name zp3 with size 10G
[root@lab8106 rbdre]# rbd create zp3 --size 10G
2、see rbd information
[root@lab8106 rbdre]# rbd info zp3
rbd image 'zp3':
size 10240 MB in 2560 objects
order 22 (4096 kB objects)
block_name_prefix: rbd_data.39652e242dd4
format: 2
features: layering
flags:
3、inquire the rbd size omapval
[root@lab8106 rbdre]# rados -p rbd getomapval rbd_header.39652e242dd4 size
value (8 bytes) :
0000 : 00 00 00 80 02 00 00 00 : ........
as i see the value of size is 00 00 00 80 02 00 00 00 ;a hex dump valume
4、set rbd size with a radom value 111111111 (i dont know how to choose value do set it that is my problem)
[root@lab8106 rbdre]# rados -p rbd setomapval rbd_header.39652e242dd4 size 111111111
5、inquire the rbd size omapval again
[root@lab8106 rbdre]# rados -p rbd getomapval rbd_header.39652e242dd4 size
value (9 bytes) :
0000 : 31 31 31 31 31 31 31 31 31 : 111111111
6、inquire the rbd size info again
[root@lab8106 rbdre]# rbd info zp3
rbd image 'zp3':
size 3148 PB in 845114819781 objects
order 22 (4096 kB objects)
block_name_prefix: rbd_data.39652e242dd4
format: 2
features: layering
flags:
=============================================
so my question is how can i set the rbd size omapval to be:
0000 : 00 00 00 80 02 00 00 00
rados -p rbd setomapval rbd_header.39652e242dd4 size (value)
the value how to write it?
thank you for your help
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