AIX条带LV的在线迁移

migratepv可以很方便地把LV从源PV迁移到目标PV，但如果是条带LV，则没那么容易了。

条带LV跨多PV，因migratepv每次只能对一个具体的PV进行操作，而且目标PV不能同时是源PV；因此我们可以加入新PV到VG中，然后分开迁移，每次只针对一个PV进行migratepv即。

 

以下是测试实例

# lslv -l slv
slv:N/A
PV                COPIES        IN BAND       DISTRIBUTION 
hdisk0            002:000:000   0%            002:000:000:000:000
hdisk1            002:000:000   100%          000:002:000:000:000

# lslv slv
LOGICAL VOLUME:     slv                    VOLUME GROUP:   rootvg
LV IDENTIFIER:      005c57bf00004c0000000129b3280cb0.11 PERMISSION:     read/write
VG STATE:           active/complete        LV STATE:       closed/syncd
TYPE:               jfs                    WRITE VERIFY:   off
MAX LPs:            512                    PP SIZE:        64 megabyte(s)
COPIES:             1                      SCHED POLICY:   striped
LPs:                4                      PPs:            4
STALE PPs:          0                      BB POLICY:      relocatable
INTER-POLICY:       maximum                RELOCATABLE:    no
INTRA-POLICY:       middle                 UPPER BOUND:    2
MOUNT POINT:        N/A                    LABEL:          None
MIRROR WRITE CONSISTENCY: on/ACTIVE                             
EACH LP COPY ON A SEPARATE PV ?: yes (superstrict)                     
Serialize IO ?:     NO                                    
STRIPE WIDTH:       2                                     
STRIPE SIZE:        8K   

 

# migratepv -l slv hdisk0 hdisk1 
0516-1244 migratepv: Destination physical volume hdisk1 contains
        partitions of the logical volume slv.
0516-812 migratepv: Warning, migratepv did not completely succeed;
        all physical partitions have not been moved off the PV.

 

# lspv
hdisk0          0004248ff72a949f                    rootvg          active
hdisk1          0004248ff76aef39                    rootvg          active
hdisk2          0004248ff76b1f4b                    None           
# extendvg rootvg hdisk2
0516-1398 extendvg: The physical volume hdisk2, appears to belong to
another volume group. Use the force option to add this physical volume
to a volume group.
0516-792 extendvg: Unable to extend volume group.
# extendvg -f rootvg hdisk2
# lspv
hdisk0          0004248ff72a949f                    rootvg          active
hdisk1          0004248ff76aef39                    rootvg          active
hdisk2          0004248ff76b1f4b                    rootvg          active
# migratepv -l slv hdisk0 hdisk2
# lslv -l slv
slv:N/A
PV                COPIES        IN BAND       DISTRIBUTION 
hdisk2            002:000:000   100%          000:002:000:000:000
hdisk1            002:000:000   100%          000:002:000:000:000

 

如果有HDISK4，那么把它加入ROOTVG中后，可以利用以上办法把存放在HDISK1中的slv迁移到HDISK4上