Veritas Volume Manager -10 [manual creation of concat & stripe mirror]

      VXVM-10 (Manual)

What we will learn in Next Few Pages,

·         Layered Volume via vxmake

·         Concat-mirror / stripe-mirror

We need

4 Subdisks

4 Plexes – 1 SD for each plex

2 volumes – 2 plexes for each volume

Did u visualize the diagram?

DG,

root@pr-01:>/# vxdg init mdg cds=off d2=c2t2d0 d3=c2t3d0 d4=c2t4d0 d5=c2t5d0

SUBDISK,

root@pr-01:>/# vxmake -g mdg sd d2-01 d2,0,1900032

root@pr-01:>/# vxmake -g mdg sd d3-01 d3,0,1900032

root@pr-01:>/# vxmake -g mdg sd d4-01 d4,0,1900032

root@pr-01:>/# vxmake -g mdg sd d5-01 d5,0,1900032

PLEX,

root@pr-01:>/# vxmake -g mdg plex layer1-01 sd=d2-01

root@pr-01:>/# vxmake -g mdg plex layer1-02 sd=d3-01

root@pr-01:>/# vxmake -g mdg plex layer2-01 sd=d4-01

root@pr-01:>/# vxmake -g mdg plex layer2-02 sd=d5-01

VOLUME,

root@pr-01:>/# vxmake -g mdg -U fsgen vol layer1 plex=layer1-01,layer1-02

root@pr-01:>/# vxmake -g mdg -U fsgen vol layer2 plex=layer2-01,layer2-02

VOLUME START,

root@pr-01:>/# vxvol -g mdg start layer1

root@pr-01:>/# vxvol -g mdg start layer2

Both volumes are supposed to be start here, b’coz after that these will change in subvolumes. And subvolumes cannot be started

SET THE LAYERED ON (FOR MIRROR)

root@pr-01:>/# vxedit -g mdg set layered=on layer1

root@pr-01:>/# vxedit -g mdg set layered=on layer2

root@pr-01:>/# vxmake -g mdg sd test-subvol01 layer1,0,1900032

root@pr-01:>/# vxmake -g mdg sd test-subvol02 layer2,0,1900032

root@pr-01:>/# vxmake -g mdg plex plex1 sd=test-subvol01,test-subvol02

           This will create default Concat-Mirror Structure

           If want to create Stripe-Mirror then,

#vxmake –g mdg plex plex1 layout=stripe ncol=2 stwidth=128 sd=test-subvol01,test-subvol02

root@pr-01:>/# vxmake -g mdg -U fsgen vol catvol plex=plex1

root@pr-01:>/# vxvol -g mdg start catvol

VxVM vxvol INFO V-5-1-12459 Volume layer1 of diskgroup mdg is already started

VxVM vxvol INFO V-5-1-12459 Volume layer2 of diskgroup mdg is already started

root@pr-01:>/# vxprint -htq

Disk group: mdg

dg mdg          default      default  4000     1411648030.30.pr-01

dm d2           c2t2d0s2     auto     65536    1900032  -

dm d3           c2t3d0s2     auto     65536    1900032  -

dm d4           c2t4d0s2     auto     65536    1900032  -

dm d5           c2t5d0s2     auto     65536    1900032  -

v  catvol       -            ENABLED  ACTIVE   3800064  ROUND     -        fsgen

pl plex1        catvol       ENABLED  ACTIVE   3800064  CONCAT    -        RW

sv test-subvol01 plex1       layer1   1        1900032  0         2/2      ENA

sv test-subvol02 plex1       layer2   1        1900032  1900032   2/2      ENA

v  layer1       -            ENABLED  ACTIVE   1900032  ROUND     -        fsgen

pl layer1-01    layer1       ENABLED  ACTIVE   1900032  CONCAT    -        RW

sd d2-01        layer1-01    d2       0        1900032  0         c2t2d0   ENA

pl layer1-02    layer1       ENABLED  ACTIVE   1900032  CONCAT    -        RW

sd d3-01        layer1-02    d3       0        1900032  0         c2t3d0   ENA

v  layer2       -            ENABLED  ACTIVE   1900032  ROUND     -        fsgen

pl layer2-01    layer2       ENABLED  ACTIVE   1900032  CONCAT    -        RW

sd d4-01        layer2-01    d4       0        1900032  0         c2t4d0   ENA

pl layer2-02    layer2       ENABLED  ACTIVE   1900032  CONCAT    -        RW

sd d5-01        layer2-02    d5       0        1900032  0         c2t5d0   ENA

DID U GOT what happened?

NO? Let’s explain

root@pr-01:>/# vxedit -g mdg set layered=on layer1

root@pr-01:>/# vxedit -g mdg set layered=on layer2

We initiate or direct here for mirroring that we are going to create layered volumes

root@pr-01:>/# vxmake -g mdg sd test-subvol01 layer1,0,1900032

root@pr-01:>/# vxmake -g mdg sd test-subvol02 layer2,0,1900032

Here we made 2 subvolumes from volumes layer1 & layer2

root@pr-01:>/# vxmake -g mdg plex plex1 sd=test-subvol01,test-subvol02

Now created plex from newly created subvolumes

root@pr-01:>/# vxmake -g mdg -U fsgen vol catvol plex=plex1

Now created Volume on the top of newly created plex

root@pr-01:>/# vxvol -g mdg start catvol

Started the volume

NOW we can create FS on the volume “catvol” and mount it.