OCM 12c Preparation - Prepare your Environment

As we have many situations to deal with in the topics, my recommendation is creating 6 VMs using Virtualbox:

1. Oracle DB Single Instance + Oracle Data Guard
   • RAM: 4G
   • / = 10G ; SWAP = 8G ; /u01 = 40G (Ora Binaries + Datafiles)
2. Oracle Enterprise Manager + Oracle Data Guard
   • RAM: 6G
   • / = 10G ; SWAP = 8G ; /u01 = 70G (Ora Binaries + EM Binaries + Datafiles)
3. Oracle RAC Node 1 - Hub
4. Oracle RAC Node 2 - Hub
5. Oracle RAC Node 3 - Hub
6. Oracle RAC Node 4 - Leaf
   • For all RACs:
   • RAM: ( Hub with mgmtdb: 4G / Other Hubs: 3.4G / Leafs: 1.6G )
   • / = 10G ; SWAP = 8G ; /u01 = 16G (Ora Binaries)

With those 6 servers, you can practice:

• Single Instances (CDB + Non CDB + PDB Clone) and EM using Servers 1 and 2 above.
• DataGuard with Primary + Far Sync + Physical/Logical Stdby, also using Servers 1 and 2. You can simulate Far Sync instances creating them on the same server.
• RAC (Hub or Leaf nodes) with Servers 3 to 6 (use Servers 5 and 6 to play with adding/removing nodes)

I won't show here how to create an VirtualBox and install Oracle Linux software, as you can find about 533,000 results in 0.34 seconds using Google. I recommend using the standard Linux installation that comes with 643 RPMs and add the minimum packages necessary for oracle with oracle-rdbms-server-12cR1-preinstall.x86_64 rpm.

When using a 16GB memory notebook to practice with the Virtualbox VMs, will be hard to have all the machines up and running at the same time. So only have turned on the machines which are necessary for the correspondent skill set.

Try to create VM's with the least possible RAM and Disk memory allocated.

• RAM Memory utilization of Oracle Linux 6.5 running w/o Grid or Oracle softwares - 157 MBs.
• So 4 GBs of RAM should be enough for all scenario (except EM machine, which I recommend 6 GBs)
• In all servers I do recommend around 10G for "/" and 8G for SWAP (keep your unzipped installers on a shared external folder).
• On RAC Servers, add external disks for ASM Disks.

And remember, the official Oracle Doc is the only material that you will have on the exam day, so being fast and getting as soon as possible to the item in the DOC is a necessity. Have it shared in all your servers.

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