kk Blog —— 通用基础

pvdisplay -m /dev/sdd1

Move all physical extents that are used by simple LVs on the specified PV to free physical extents elsewhere in the VG.
pvmove /dev/sdb1

Use a specific destination PV when moving physical extents.
pvmove /dev/sdb1 /dev/sdc1

Move extents belonging to a single LV.
pvmove -n lvol1 /dev/sdb1 /dev/sdc1

Rather than moving the contents of an entire device, it is possible to move a range of physical extents, for example numbers 1000 to 1999 inclusive on the specified PV.
pvmove /dev/sdb1:1000-1999

A range of physical extents to move can be specified as start+length. For example, starting from PE 1000. (Counting starts from 0, so this refers to the 1001st to the 2000th PE inclusive.)
pvmove /dev/sdb1:1000+1000

Move a range of physical extents to a specific PV (which must have sufficient free extents).
pvmove /dev/sdb1:1000-1999 /dev/sdc1

Move a range of physical extents to specific new extents on a new PV.
pvmove /dev/sdb1:1000-1999 /dev/sdc1:0-999

If the source and destination are on the same disk, the anywhere allocation policy is needed.
pvmove --alloc anywhere /dev/sdb1:1000-1999 /dev/sdb1:0-999

The part of a specific LV present within in a range of physical extents can also be picked out and moved.
pvmove -n lvol1 /dev/sdb1:1000-1999 /dev/sdc1

 [root@redhat6 ~]# pvs -o+pv_used
  PV         VG         Fmt  Attr PSize  PFree Used  
  /dev/sda2  vg_redhat6 lvm2 a--  14.51g    0   14.51g
  /dev/sdb   vg_redhat6 lvm2 a--   4.00g 2.62g   1.38g
  /dev/sdc   vg_redhat6 lvm2 a--   6.00g 5.60g 404.00m

[root@redhat6 ~]# pvmove /dev/sdb /dev/sdc
  /dev/sdb: Moved: 0.8%
  /dev/sdb: Moved: 28.3%
  /dev/sdb: Moved: 42.5%
  /dev/sdb: Moved: 57.2%
  /dev/sdb: Moved: 72.8%
  /dev/sdb: Moved: 92.6%
  /dev/sdb: Moved: 100.0%

[root@redhat6 ~]# pvs -o+pv_used
  PV         VG         Fmt  Attr PSize  PFree Used 
  /dev/sda2  vg_redhat6 lvm2 a--  14.51g    0  14.51g
  /dev/sdb   vg_redhat6 lvm2 a--   4.00g 4.00g     0
  /dev/sdc   vg_redhat6 lvm2 a--   6.00g 4.22g  1.77g

[root@redhat6 ~]# vgreduce /dev/vg_redhat6 /dev/sdb 
  Removed "/dev/sdb" from volume group "vg_redhat6" 

[root@redhat6 ~]# pvs
  PV         VG         Fmt  Attr PSize  PFree
  /dev/sda2  vg_redhat6 lvm2 a--  14.51g    0
  /dev/sdb              lvm2 a--   4.00g 4.00g
  /dev/sdc   vg_redhat6 lvm2 a--   6.00g 4.22g 

[root@redhat6 ~]# vgcreate vg_pgroot  /dev/sdb
  Volume group "vg_pgroot" successfully created
[root@redhat6 ~]# vgs
  VG         #PV #LV #SN Attr   VSize  VFree
  vg_pgroot    1   0   0 wz--n-  4.00g 4.00g
  vg_redhat6   2   4   0 wz--n- 20.50g 4.22g

[root@redhat6 ~]# pvs
  PV         VG         Fmt  Attr PSize  PFree
  /dev/sda2  vg_redhat6 lvm2 a--  14.51g    0
  /dev/sdb   vg_pgroot  lvm2 a--   4.00g 4.00g
  /dev/sdc   vg_redhat6 lvm2 a--   6.00g 4.22g

fetch('http://localhost:8080/springmvc/test_get.do?name=who', {
	method: 'GET',
	headers: {
		'Content-Type': 'application/x-www-form-urlencoded',
	},
}).then((resp)=>{return resp.text()}).then((data)=>{console.log(data)});

fetch('http://localhost:8080/springmvc/test_post.do', {
	method: 'POST',
	headers: {
		'Content-Type': 'application/x-www-form-urlencoded',
	},
	body: 'name=who'
}).then((resp)=>{return resp.text()}).then((data)=>{console.log(data)});