Share VG´s without Cluster HA

[Andrew_adm]

Hi,
Customer has a HA Cluster (over X.25) and wants to halt cluster keeping data and accessing them in two possible ways (not decided yet), without using cluster again:
1.- Every node( 2 nodes) have to be able to access data in simultaneously way to the same VG´s
2.- Non simultaneous access is required from nodes.
My doubt comes about how to use -S and -c vgchange´s parameters.
I thought a plan as follows:
1.- Stop application, halt package on every node
2.-# vgchange -a n /dev/vgXX
# vgchange -S y -c n /dev/ vgXX (has it sense? ), is possible to share accessing VG´s without HA cluster?
3.- umount mounted_points
4.-vgchange -a y /dev/vgxx

I´ve read a VG´s can be accessed from several servers activating only on one node Read&write access and Read only access on the rest of systems. Will i get share vg access with -S y and -c n in conjunction?
I need help.

We´ll get non simultaneous access
exporting/importing maps on every server.
I need help,

Thanks.

Regards

[IT_2007]

I don't think it is possible to access VG on multiple nodes without HA cluster.

-S option is for Cluster mode only.

[Luk Vandenbussche · Accepted solution]

You can do this with Read / Write access on one node and read only access on the other nodes.

On the first node

vgchange -a y vgxx

On the other node

vgchange -a r vgxx

[Andrew_adm]

If customer dont like Read/Write access on one node and Read Only Access on the other one, which would it be the solution to access simultaneouly from each server? would it be to create another VG with the same data to be used for the other system?
Thx

[sajeer_2]

If customer dont like Read/Write access on one node and Read Only Access on the other one, which would it be the solution to access simultaneouly from each server?

Other option is to use NFS

[Andrew_adm]

Hi guys !
Thank you everyone for your help, customer has decided other solution, it will consist in 2 VG´s, old one with data stored and a new empty one, this one will be used to run the same application and to save data generated by it in a independent way from the other node.By my side thread ended.

Best regards.