AIX : How To Extend File System

How To Extend File System:

1> Suppose we want to increase below file system

# df -k /export/nim/mksysb

Filesystem    1024-blocks      Free %Used    Iused %Iused Mounted on

/dev/mksysb6051   138412032  22990208   84%       47     1% /export/nim/mksysb

2> Check to which VG this LV belong

# lslv mksysb6051

LOGICAL VOLUME:     mksysb6051             VOLUME GROUP:   nim6051T2C

LV IDENTIFIER:      00c32b7700004c000000013b97085b50.3 PERMISSION:     read/write

VG STATE:           active/complete        LV STATE:       opened/syncd

TYPE:               jfs2                   WRITE VERIFY:   off

MAX LPs:            1024                   PP SIZE:        256 megabyte(s)

COPIES:             1                      SCHED POLICY:   parallel

LPs:                528                    PPs:            528

STALE PPs:          0                      BB POLICY:      relocatable

INTER-POLICY:       minimum                RELOCATABLE:    yes

INTRA-POLICY:       middle                 UPPER BOUND:    1024

MOUNT POINT:        /export/nim/mksysb     LABEL:          /export/nim/mksysb

DEVICE UID:         0                      DEVICE GID:     0

DEVICE PERMISSIONS: 432                                   

MIRROR WRITE CONSISTENCY: on/ACTIVE                             

EACH LP COPY ON A SEPARATE PV ?: yes                                    

Serialize IO ?:     NO                                    

INFINITE RETRY:     no                                    

DEVICESUBTYPE:      DS_LVZ                                       

COPY 1 MIRROR POOL: None                                  

COPY 2 MIRROR POOL: None                                  

COPY 3 MIRROR POOL: None                                  

3> Check if physical volume have the free space. Here highlighted field shows only 2560 M is free.

# lsvg nim6051T2C

VOLUME GROUP:       nim6051T2C               VG IDENTIFIER:  00c32b7700004c000000013b97085b50

VG STATE:           active                   PP SIZE:        256 megabyte(s)

VG PERMISSION:      read/write               TOTAL PPs:      1599 (409344 megabytes)

MAX LVs:            256                      FREE PPs:       10 (2560 megabytes)

LVs:                7                        USED PPs:       1589 (406784 megabytes)

OPEN LVs:           7                        QUORUM:         2 (Enabled)

TOTAL PVs:          1                        VG DESCRIPTORS: 2

STALE PVs:          0                        STALE PPs:      0

ACTIVE PVs:         1                        AUTO ON:        yes

MAX PPs per VG:     32768                    MAX PVs:        1024

LTG size (Dynamic): 1024 kilobyte(s)         AUTO SYNC:      no

HOT SPARE:          no                       BB POLICY:      relocatable

MIRROR POOL STRICT: off                                      

PV RESTRICTION:     none                     INFINITE RETRY: no

DISK BLOCK SIZE:    512                               

4> To increase the file system by 2000MB

   #chfs -a size=+2G /export/nim/mksysb
   #chfs -a size=+2000M /export/nim/mksysb

   Without “+” sign it will make the file system size as mentioned. With “+” sign it basically increase it by mentioned size.