Extending 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 -g testdg -htrL -v testvol

ST NAME         STATE        DM_CNT   SPARE_CNT         APPVOL_CNT

DM NAME         DEVICE       TYPE     PRIVLEN  PUBLEN   STATE

RV NAME         RLINK_CNT    KSTATE   STATE    PRIMARY  DATAVOLS  SRL

RL NAME         RVG          KSTATE   STATE    REM_HOST REM_DG    REM_RLNK

CO NAME         CACHEVOL     KSTATE   STATE

VT NAME         RVG          KSTATE   STATE    NVOLUME

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

dm testdg01_4g  apevmx11_0398 auto    32768    4160384  -

dm testdg02_4g  apevmx11_070c auto    32768    4157312  -

v  testvol      -            ENABLED  ACTIVE   8313856  SELECT    testvol-01 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

The Above Volume is two-way stripe Volume

Extending the volume by: 8G

Initializing a disk:

# vxdisksetup -i apevmx11_070d

# vxdisksetup -i apevmx11_070e

Adding the disk to the diskgroup:

# vxdg -g testdg adddisk testdg03_4g=apevmx11_070d

# vxdg -g testdg adddisk testdg04_4g=apevmx11_070e

Checking the free space available with the given disk:

#vxassist -g testdg maxgrow testvol layout=stripe ncol=2 alloc=testdg03_4g testdg04_4g

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

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    testvol-01 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

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