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Saturday, April 12, 2014

Extending Mirror-Stripe Volume in Veritas Volume Manager



File System Size before FS Extension:
#bdf /test_mnt
Filesystem          kbytes    used   avail %used Mounted on
/dev/vx/dsk/testdg/testvol
                   8313856   17896 8231160    0% /test_mnt

Checking the Layout of the volume:

#vxprint -htg testdg -v testvol
V  NAME         RVG/VSET/CO  KSTATE   STATE    LENGTH   READPOL   PREFPLEX UTYPE
PL NAME         VOLUME       KSTATE   STATE    LENGTH   LAYOUT    NCOL/WID MODE
SD NAME         PLEX         DISK     DISKOFFS LENGTH   [COL/]OFF DEVICE   MODE
SV NAME         PLEX         VOLNAME  NVOLLAYR LENGTH   [COL/]OFF AM/NM    MODE
SC NAME         PLEX         CACHE    DISKOFFS LENGTH   [COL/]OFF DEVICE   MODE
DC NAME         PARENTVOL    LOGVOL
SP NAME         SNAPVOL      DCO
EX NAME         ASSOC        VC                       PERMS    MODE     STATE

v  testvol      -            ENABLED  ACTIVE   8313856  SELECT    -        fsgen
pl testvol-01   testvol      ENABLED  ACTIVE   8313856  STRIPE    2/64     RW
sd testdg02_4g-01 testvol-01 testdg02_4g 0     4156928  0/0       apevmx11_070c ENA
sd testdg01_4g-01 testvol-01 testdg01_4g 0     4156928  1/0       apevmx11_0398 ENA
pl testvol-02   testvol      ENABLED  ACTIVE   8313856  STRIPE    2/64     RW
sd testdg02_4gm-01 testvol-02 testdg02_4gm 0   4156928  0/0       apevmx12_07b5 ENA
sd testdg01_4gm-01 testvol-02 testdg01_4gm 0   4156928  1/0       apevmx12_0398 ENA

The Above Volume is two-way mirror-stripe Volume

Extending the volume by: 8G
Initializing a disk:
# vxdisksetup -i apevmx11_070d
# vxdisksetup -i apevmx11_070e
# vxdisksetup -i apevmx12_07b6
# vxdisksetup -i apevmx12_07b7

Adding the disk to the diskgroup:

# vxdg -g testdg adddisk testdg03_4g=apevmx11_070d
# vxdg -g testdg adddisk testdg04_4g=apevmx11_070e
# vxdg -g testdg adddisk testdg03_4gm=apevmx12_07b6
# vxdg -g testdg adddisk testdg04_4gm=apevmx12_07b7

Checking the free space available with the given disk:
#vxassist -g testdg maxgrow testvol layout=mirror-stripe ncol=2 alloc=testdg03_4g testdg04_4g testdg03_4gm testdg04_4gm
Volume testvol can be extended by 8313856 to: 16627712 (16238Mb)

The above output says that the volume could be max extended by 8313856s, and after increase of this volume by 4156416s, the final size would be 16238Mb or 16627712s

Resizing the Volume
# /etc/vx/bin/vxresize -g testdg -F vxfs testvol +8313856s alloc=testdg03_4g testdg04_4g testdg03_4gm testdg04_4gm

Checking the Layout of the volume:
#vxprint -htg testdg -v testvol
V  NAME         RVG/VSET/CO  KSTATE   STATE    LENGTH   READPOL   PREFPLEX UTYPE
PL NAME         VOLUME       KSTATE   STATE    LENGTH   LAYOUT    NCOL/WID MODE
SD NAME         PLEX         DISK     DISKOFFS LENGTH   [COL/]OFF DEVICE   MODE
SV NAME         PLEX         VOLNAME  NVOLLAYR LENGTH   [COL/]OFF AM/NM    MODE
SC NAME         PLEX         CACHE    DISKOFFS LENGTH   [COL/]OFF DEVICE   MODE
DC NAME         PARENTVOL    LOGVOL
SP NAME         SNAPVOL      DCO
EX NAME         ASSOC        VC                       PERMS    MODE     STATE

v  testvol      -            ENABLED  ACTIVE   16627712 SELECT    -        fsgen
pl testvol-01   testvol      ENABLED  ACTIVE   16627712 STRIPE    2/64     RW
sd testdg02_4g-01 testvol-01 testdg02_4g 0     4156928  0/0       apevmx11_070c ENA
sd testdg03_4g-01 testvol-01 testdg03_4g 0     4156928  0/4156928 apevmx11_070d ENA
sd testdg01_4g-01 testvol-01 testdg01_4g 0     4156928  1/0       apevmx11_0398 ENA
sd testdg04_4g-01 testvol-01 testdg04_4g 0     4156928  1/4156928 apevmx11_070e ENA
pl testvol-02   testvol      ENABLED  ACTIVE   16627712 STRIPE    2/64     RW
sd testdg02_4gm-01 testvol-02 testdg02_4gm 0   4156928  0/0       apevmx12_07b5 ENA
sd testdg03_4gm-01 testvol-02 testdg03_4gm 0   4156928  0/4156928 apevmx12_07b6 ENA
sd testdg01_4gm-01 testvol-02 testdg01_4gm 0   4156928  1/0       apevmx12_0398 ENA
sd testdg04_4gm-01 testvol-02 testdg04_4gm 0   4156928  1/4156928 apevmx12_07b7 ENA

File System Size after FS Increase
#bdf /test_mnt
Filesystem          kbytes    used   avail %used Mounted on
/dev/vx/dsk/testdg/testvol
                   16627712   18152 16479808    0% /test_mnt

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