Setting up Production Server in R12.2

[Vithal]

Hi,

We are planning to setup production servers for R12.2.

For this we have procured 2 servers each for application tier.
Also we have 2 servers for Db tier as well.

Since we won't have rac we will have to run the db instance exclusively on one node only ,
keeping the other as a standby only.
i.e a active passive config.

I was wondering that if we keep the database mount point /d01 on an NFS between the 2 db nodes , we can

1: save disk space.
2. in case active node 1 goes down , we can immediately start the database on node2.
    else would have to restore cold backup to /d01 of node2.
3. if case 2 above arises , i suppose we would have to run adcfgclone on node 2 db tier,
4. However does Oracle support running a database on an NFS ?

Regarding the application tier , also we will have similar situation.
one active and one passive node.
I was wondering that if we keep the application mount point /a01 on an NFS between the 2 Ap nodes , we can :

1. save disk space
2. in case active node 1 goes down , we can  start the application on node2.
    else would have to restore cold backup to /a01 of node2.
3. if case 2 above arises , i suppose we would have to run adcfgclone on node 2 app tier ?
4. However does Oracle support running a Application on an NFS ?

Thanks in advance
Vithal.

[ErmanArslansOracleBlog]

For apps tier, you can definetly use NFS. It is supported and documented. It is called as Shared Application Filesystem (multi-node). In this conf, your apps tier is running on multi node .. (the second node's apps tier is coming from the first node via NFS)

For db tier, it is supported. "Network file system (NFS) on a certified network-attached storage (NAS) filer"
However, I won't recommend it. You will have problems with DB I/O.. (performance)

Here is what Oracle says about it:

The performance of Oracle software and databases stored on NAS devices depends on the performance of the network connection between the servers and the network-attached storage devices.For better performance, Oracle recommends that you connect servers to NAS devices using private dedicated network connections. NFS network connections should use Gigabit Ethernet or better.

[vitha]

Thanks ,

However can you advise on the other details i am asking about.
Lke if we go for an NFS like solution , how to switch over to the second node ?

Regards,
Vithal.

[ErmanArslansOracleBlog]

Basically, you get a downtime when the first node is down.
Then you mount the NFS shares directly to the second node and start the services on the second node.  (by fixing any configuration issues during this way)