创建pv
pvcreate /dev/sda3
pvcreate /dev/sda7
创建vg
vgcreate dbf2_vg /dev/sda3 /dev/sda7
创建lv
- -i 指定跨PV的个数为2
- -I 指定条带单元的大小,对应于I/O中数据单元块的大小;数值必须为2的幂,单位KB
- -n 制定卷的名称
- -L 卷的大小
#指定大小
lvcreate -n var_lv -L 10G dbf2_vg
#使用剩余所有空间
lvcreate -l +100%FREE -n meta_lv dbf2_vg
#创建条带卷
lvcreate -L 2G -i2 -I 64 -n meta_lv dbf2_vg
查看lv情况
- 默认配置
[root@demo_node3 ~]# lvs --segment
LV VG Attr #Str Type SSize
dbf_lv dbf_vg -wi-a----- 1 linear 447.13g
dbf_lv dbf_vg -wi-a----- 1 linear 447.13g
[root@demo_node3 ~]# lvs -a -o+lv_layout,lv_role,stripes,devices
LV VG Attr LSize Pool Origin Data% Meta% Move Log Cpy%Sync Convert Layout Role #Str Devices
dbf_lv dbf_vg -wi-a----- 894.26g linear public 1 /dev/sdb(0)
dbf_lv dbf_vg -wi-a----- 894.26g linear public 1 /dev/sdc(0)
- 条带化
[root@demo_node3 ~]# lvs --segment
LV VG Attr #Str Type SSize
dbf_lv dbf_vg -wi-ao---- 2 striped 894.26g
[root@demo_node3 ~]# lvs -a -o+lv_layout,lv_role,stripes,devices
LV VG Attr LSize Pool Origin Data% Meta% Move Log Cpy%Sync Convert Layout Role #Str Devices
dbf_lv dbf_vg -wi-ao---- 894.26g striped public 2 /dev/sdb(0),/dev/sdc(0)