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How To Expand A Filesystem in AIX
Quick and easy steps to expand your AIX filesystem using smit, lsvg and chfs commands.

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AIX – How to extend JFS filesystem – – KB Home –

AIX – How to extend JFS filesystem · 1. Identify the filesystem you want to extend. · 2. Take example to extend /local. · 3. Find out if the volume …

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How To Expand A Filesystem in AIX – devopszones

How To Expand A Filesystem in AIX. aix_logog. On One fine day our /data directory reached 90%. We have been alarmed to extend the file …

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How to extend AIX file system df lsvg chfs – wachid web id

How to extend AIX file system df lsvg chfs · # lslv hd1. LOGICAL VOLUME: hd1 · VOLUME GROUP: rootvg. LV IDENTIFIER: …

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Increase filesystem and or logical volume

Hi, I am new to unix. I am working on Red Hat Linux and se by se on AIX also. After reading the concepts of Storage, I am now really …

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How to increase filesystem/logical volume in AIX – NGELinux

Today we will the steps to know how we can increase the filesystem in AIX. AIX is far more flexible than linux/solaris, and prove on the …

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【VDEDU】How To Expand A Filesystem in AIX
【VDEDU】How To Expand A Filesystem in AIX

주제에 대한 기사 평가 extend filesystem aix

  • Author: 崔旭
  • Views: 조회수 846회
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  • Date Published: 2016. 7. 10.
  • Video Url link: https://www.youtube.com/watch?v=t5ADeGCvuRY

How to extend JFS filesystem –

AIX – How to extend JFS filesystem

JFS on AIX machines can be extend online if needed.

To do so follow the steps below.

1. Identify the filesystem you want to extend.

Main thing we want to find out is on which logical volume it is using.

======================================================================

root@server # df -k

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

/dev/hd4 2162688 1202732 45% 24199 3% /

/dev/hd2 4521984 1029652 78% 62093 6% /usr

/dev/hd9var 655360 216404 67% 23739 15% /var

/dev/hd3 851968 810960 5% 275 1% /tmp

/dev/hd1 65536 47976 27% 362 3% /home

/proc – – – – – /proc

/dev/hd10opt 1376256 660400 53% 5555 2% /opt

/dev/locallv 32178176 4725020 86% 102939 2% /local

======================================================================

2. Take example to extend /local. It is under logical volume locallv.

Find out which volume group locallv reside on.

======================================================================

root@pat2011 # lslv locallv

LOGICAL VOLUME: locallv VOLUME GROUP: rootvg

LV IDENTIFIER: 00c4b81e00004c000000014134478035.9 PERMISSION: read/write

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

TYPE: jfs WRITE VERIFY: off

MAX LPs: 584 PP SIZE: 64 megabyte(s)

COPIES: 1 SCHED POLICY: parallel

LPs: 491 PPs: 491

STALE PPs: 0 BB POLICY: relocatable

INTER-POLICY: minimum RELOCATABLE: yes

INTRA-POLICY: center UPPER BOUND: 4

MOUNT POINT: /local LABEL: /local

MIRROR WRITE CONSISTENCY: on/ACTIVE

EACH LP COPY ON A SEPARATE PV ?: yes

Serialize IO ?: NO

INFINITE RETRY: no

======================================================================

3. Find out if the volume group it resides on has enough free space to extend [free PP].

======================================================================

root@server # lsvg rootvg

VOLUME GROUP: rootvg VG IDENTIFIER: 00c4b81e00004c000000014134478035

VG STATE: active PP SIZE: 64 megabyte(s)

VG PERMISSION: read/write TOTAL PPs: 714 (45696 megabytes)

MAX LVs: 256 FREE PPs: 13 (832 megabytes)

LVs: 14 USED PPs: 701 (44864 megabytes)

OPEN LVs: 12 QUORUM: 2 (Enabled)

TOTAL PVs: 2 VG DESCRIPTORS: 3

STALE PVs: 0 STALE PPs: 0

ACTIVE PVs: 2 AUTO ON: no

MAX PPs per VG: 32512

MAX PPs per PV: 1016 MAX PVs: 32

LTG size (Dynamic): 256 kilobyte(s) AUTO SYNC: no

HOT SPARE: no BB POLICY: relocatable

PV RESTRICTION: none INFINITE RETRY: no

======================================================================

4. If it has enough space, proceed to extend using below command.

In this example we want to extend 10MB to /local.

======================================================================

root@server # chfs -a size=+10M /local

======================================================================

How To Expand A Filesystem in AIX

How To Expand A Filesystem in AIX

# df -k /data

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

/dev/hd1 2097152 218780 90% 25894 30% /data

#

# lsvg rootvg

VOLUME GROUP: rootvg VG IDENTIFIER: 0007b8420000d9000000011f2491100e

VG STATE: active PP SIZE: 128 megabyte(s)

VG PERMISSION: read/write TOTAL PPs: 599 (76672 megabytes)

MAX LVs: 256 FREE PPs: 282 (36096 megabytes)

LVs: 13 USED PPs: 317 (40576 megabytes)

OPEN LVs: 11 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: 32512

MAX PPs per PV: 1016 MAX PVs: 32

LTG size (Dynamic): 256 kilobyte(s) AUTO SYNC: no

HOT SPARE: no BB POLICY: relocatable

#

# df -k /data Filesystem 1024-blocks Free %Used Iused %Iused Mounted on

/dev/hd1 2097152 218780 90% 25894 30% /data

# chfs -a size=+2500M /data Filesystem size changed to 5242880

# df -k /data

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

/dev/hd1 2621440 742988 72% 25894 13% /data

#

On One fine day our /data directory reached 90%. We have been alarmed to extend the file system.Our /data directory reached 90%Do we have enough space available in VG to expand?Use chfs command to expandExampleschfs -a size=4G /datachfs -a size=4000M /datachfs -a size=+4G /datachfs -a size=+50M /dataWhat those meanThe “M” stands for megabytesThe “G” stands for gigabytesThe “+” is relative sizing: change the current amount by adding this muchWithout the “+” is absolute sizing: change the current amount TO this muchHere we are increasing the filesystem by 2.5G or 2500M

How to extend AIX file system df lsvg chfs

Summary

df -k [FILESYSTEM] to find out existing filesystem usage and LV for that filesystem

lslv [LVNAME] to find out VG for that LV

lsvg [VGNAME] to find out how many PPs are free

chfs -a size=[size setting] [FILESYSTEM]to grow the filesystem

If your chfs command above errors out with 0516-787 extendlv: Maximum allocation for logical volume LVNAME is NUMBER, then you need to: chlv -x [num] [lvname]

df -k [FILESYSTEM] to see changes made

Our /home directory reached 90%

# df -k /home

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

/dev/hd1 2097152 218780 90% 25894 30% /home

#

Do we have enough space available in VG to expand?

Find out the VG.

# lslv hd1

LOGICAL VOLUME: hd1 VOLUME GROUP: rootvg

LV IDENTIFIER: 0007b8420000d9000000011f2491100e.8 PERMISSION: read/write

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

TYPE: jfs2 WRITE VERIFY: off

MAX LPs: 512 PP SIZE: 128 megabyte(s)

COPIES: 1 SCHED POLICY: parallel

LPs: 20 PPs: 20

STALE PPs: 0 BB POLICY: relocatable

INTER-POLICY: minimum RELOCATABLE: yes

INTRA-POLICY: center UPPER BOUND: 32

MOUNT POINT: /home LABEL: /home

MIRROR WRITE CONSISTENCY: on/ACTIVE

EACH LP COPY ON A SEPARATE PV ?: yes

Serialize IO ?: NO

#

How much space is available in the VG?

# lsvg rootvg

VOLUME GROUP: rootvg VG IDENTIFIER: 0007b8420000d9000000011f2491100e

VG STATE: active PP SIZE: 128 megabyte(s)

VG PERMISSION: read/write TOTAL PPs: 599 (76672 megabytes)

MAX LVs: 256 FREE PPs: 282 (36096 megabytes)

LVs: 13 USED PPs: 317 (40576 megabytes)

OPEN LVs: 11 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: 32512

MAX PPs per PV: 1016 MAX PVs: 32

LTG size (Dynamic): 256 kilobyte(s) AUTO SYNC: no

HOT SPARE: no BB POLICY: relocatable

#

Use chfs command to expand

Examples

chfs -a size=3G /home

chfs -a size=3000M /home

chfs -a size=+1G /home

chfs -a size=+500M /home

What those mean

The “M” stands for megabytesThe “G” stands for gigabytesThe “+” is relative sizing: change the current amount by adding this muchWithout the “+” is absolute sizing: change the current amount TO this muchNOTE: You can use “-” to decrease a filesystem size. Generally speaking for LVs, it is harder to shrink a filesystem. Sometimes it cannot be done while the filesystem is mounted, and sometimes depending on fragmentation it may not be able to be done at all. I have found AIX to be more robust in this department than various Linux LVM implementations. Generally speaking, though, when you increase your filesystem size, it is best to think of it as permanent .. (for the most part).

From the chfs man page …

If Value has the M suffix, it is interpreted to be in Megabytes. If Value has a G suffix, it is interpreted to be in Gigabytes. If Value begins with a +, it is interpreted as a request to increase the file system size by the specified amount. If the specified size is not evenly divisible by the physical partition size, it is rounded up to the closest number that is evenly divisible.

My example.. Change to absolute size 2.5G or 2500M

# df -k /home

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

/dev/hd1 2097152 218780 90% 25894 30% /home

# chfs -a size=2500M /home

Filesystem size changed to 5242880

# df -k /home

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

/dev/hd1 2621440 742988 72% 25894 13% /home

#

If chfs errors with 0516-787: extendlv: Maximum allocation (etc)…

If you get an error like:

0516-787 extendlv: Maximum allocation for logical volume vg01vol1

is 512.

This means that you have hit the limit on the LV of how large you can make it.

The first time I hit this error I almost had a heart attack. Fortunately, you can extend this very easily either using chlvor smitty

In this example I was trying to expand my LV (mydatalv01) to 600 PPs and the limit was 512 PPs

# chlv -x 600 mydatalv01

After that you can then do your chfs command

# chfs -a size=+25G /mydata01

In smitty:

smitty chlv -> Change a Logical Volume -> [ENTER] -> LOGICAL VOLUME name -> [F4]

And from there you can change LV properties.

DONE!

Increase filesystem and or logical volume

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How to increase filesystem/logical volume in AIX ?

Today we will the steps to know how we can increase the filesystem in AIX.

AIX is far more flexible than linux/solaris, and provide on the fly filesystem increase/shrink facility.

Lets see how to increase the filesystem, and in case storage space is increased, then how to detect that on filesystem.

1. Increase a partition by 50GB.

ngeunix560 –> chfs -a size=+50G /oragrid Filesystem size changed to 272236544 ngeunix560 –> df -gt /oragrid Filesystem GB blocks Used Free %Used Mounted on /dev/prodglv 129.81 52.99 76.82 41% /oragrid

2. What data to provide to storage/SAN team for increase of disk.

ngeunix579 –> df -g /mtpsit4f Filesystem GB blocks Free %Used Iused %Iused Mounted on /dev/mtp4flv 4.62 4.62 1% 10 1% /mtpsit4f ngeunix579 –> lslv -l mtp4flv mtp4flv:/mtpsit4f PV COPIES IN BAND DISTRIBUTION 3pardata0_71439 074:000:000 100% 000:074:000:000:000 ngeunix579 –> lsattr -El 3pardata0_71439 dmpname 3pardata0_71439 DMP Device name True pvid 00cfc3470009037d0000000000000000 Physical volume identifier True unique_id 3PARdata%5FVV%5FFBDC%5F170F0001FBDC Unique device identifier True ngeunix579 –> Now provide above details to SAN team in increase the space on this PV.

3. How to scan the new added space in our VG.

First send email request for growth to SAN Support.

Once they have increased the PV size, we can scan the new increased change using below command.

ngeunix560 –> chvg -g productsvg ngeunix560 –>

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