AIX - LVM - Extend Logical Volume

AIX - LVM - Extend Logical Volume

If we want to increase LV size using extendlv command

#lslv newlv

The above command shows LV size, no of LP’s and some other information about LV, suppose LV has 10 LP’s and usage is up to 95% full, that time we can increase the LV size online by adding no of LP’s in newlv i.e.

#extendlv newlv 5

After executing the above command 5 PP’s added with newlv, then some additional space will available in newlv. Suppose you want to see this changes again use the lslv command

#lslv newlv (it will show no of LV’s is 15 and some additional space)

Website Load - Measure Time

Website Load - Measure Time

AIX - LVM - List Logical Volume

List LV

Suppose we want see what are the Lv’s available in datavg, then your command will be

#lsvg –l datavg
It will login list LV details

newlv

Now we want see newlv properties, then your command will be



#lslv newlv

The above command is used to display the newlv properties, i.e. available pp’s mount pint, label name, stale partitions. Etc.

#lslv –m newlv – To display the lvcopy information’s

AIX - LVM - Create Logical Volume

Create LV

All the File systems belongs to individual LV, after creating the VG’s we should create the LV using mklv command

Suppose you want to create LV name as newlv

#mklv –y newlv –t jfs2 datavg 5 hdisk4

-y for confirmation
-t type mentioning the filesystem type i.e. jfs or jfs2,
Datavg – lv created on datavg
5 – 5 PP’s allocated for newlv ( 1 pp size 32MB the newlv size is 32MB*5 = 160MB)
Hdisk4 – that newlv is belongs to PV hdisk4

AIX - LVM - Varryoff Volume Group

Varryoff VG

This is just for VG deactivation; some clients want to deactivate VG for project Restriction. Suppose customer want deactivate testvg then your command will be

#lsvg –o
Rootvg
Datavg
Testvg

#Varryoff testvg

#lsvg –o
Rootvg
Datavg

The above command display only two online VG’s and it will not show testvg because testvg is offline VG.

AIX - LVM - VarryOn Volume Group

AIX - LVM - VarryOn Volume Group

Varryon VG

This is just for VG activation; some times clients want to deactivate VG for project restriction. After that we want to activate the VG for further data access

Suppose we want to activate testvg, then your command will be

#lsvg
Rootvg
Datavg
Testvg

The above command shows what are VG’s available

#lsvg –o
Rootvg
Datavg

The above commands shows only online VG’s because testvg is offline so we have to activate testvg

#varryonvg testvg

#lsvg –o
Rootvg
Datavg
Testvg

Now above command is display the testvg.

AIX - Reduce Volume Group

Reduce VG

We can remove the VG using reducevg command, if we want remove testvg and testvg has one pv hdisk9

#lsvg –p testvg
Hdisk9
#

Now we will remove the pv from testvg

#reducevg –f testvg hdisk9

f- option is used to force reduce, you have data in pv hdisk9, that time I will not any questions, directly it will remove the pv from testvg. Suppose 2 PV’s available in testvg then one by one we can reduce the PV’s

AIX -Extend Volume Group

AIX -Extend Volume Group

Extend VG

We can increase VG size by adding Pv into existing VG, example: extendvg command

#lsvg –p datavg
Hdisk4
Hdisk5
#
datavg has 2 PV’s now we want to extend datavg, then your command will be

#extendvg datavg hdisk6

After executed command hdisk6 pv added with datavg

#lsvg –l datavg
Hdisk4
Hdisk5
Hdisk6

AIX - List Volume Group

AIX - List Volume Group

List VG

We can list VG information using following commands

#lsvg – It will display the available vg’s
#lsvg datavg – It will display full details about datavg only
#lsvg –o It will display the online vg’s
#lsvg – l datavg – It will display the all logical volume details across the datavg
#lsvg –p datavg – It will display the information about all PV’s in datavg

Above operations can be performed by using lsvg commands

AIX - Create Voulme Group

AIX - Create Voulme Group

We can create VG by using mkvg commands

#mkvg –s 32 –y datavg hdisk4

The above command is creating datavg using pv hdisk4 and pp size is 32MB

#mkvg datavg hdisk4

The above command will create datavg using pv hdisk4 and pp size is by default 128MB.