Tag Archives: Installation

Playing with Oracle 12c and Virtual Box

I keep “playing’” with 12c, and this time I’d like to show you how easy is to install the Pre-Built VMs provided by Oracle.

As I mentioned, the process is very simple, these are the requirements to install it:

  • At least 2GB RAM. Default VM is 1G RAM, for better performance increase.
  • At least 15GB of free space (Note: virtualization works best with contiguous space so it is a good idea if on Windows to run a defrag program, and make sure you are using NTFS for your file system to handle large files on Windows. )
  • 2GHz Processor (a lesser processor will be acceptable but slower)
  • Mozilla Firefox 2.0 or higher, Internet Explorer 7 or higher, Safari 3.0 and higher or Google Chrome 1.0 or higher
  • Adobe Acrobat reader
  • Admin privileges on your box

So now that you know the minimum requirements, let’s move to the installation process:

  1. Download and install Oracle VM VirtualBox on your host system from HERE.
  2. Download the Virtual Machine from HERE. (DownloadOTN_Developer_Day_VM.ova (5,215,947,264 bytes, md5sum: 4e8ef75cdbd0fbe3d3beee8f873b2d4a)
  3. Open Oracle VM VirtualBox and Import your VM: File > Import Appliance to launch Appliance Import Wizard.
    Click Choose… to browse to the directory you re-assembled all the files in and select the OTN_Developer_Day_VM.ova.  Then click Next to begin importing the virtual machine. It will prompt you to agree to the appropriate developer licenses while importing. You will see ‘Oracle Developer Days (Powered Off)’ when it is finished importing.
  4. Test your VM: Once the import has completed, double-click the OTN Developer Days VM. Click OK to close the Virtualbox Information dialogs. When you get to the Enterprise Linux 6 screen you can now login. (Username and password is oracle.) Allow the process to complete; it is ready when you see a terminal window, which you can close.
  5. Once you are finished working in the guest VM you can shut it down via System > Shut Down; this will return the guest VM to the Powered Off state.

As you can see, the process is pretty simple right?

Have a nice day!!

12c, First Steps

After the Holidays, I was finally able to start with 12C!! So once I finish the installation, I tried to connect to the DB and create a user. That is when I discover that you need to connect to a special Database in order to perform that.

I got an error message creating a user.  Well, I figured out how to create a new user and a few other things.  I’m working with the DB12C database that comes with the install and all the parameters, etc. that come with it.

Evidently the default install comes with a PDB called PDBORCL.  So, I have two tns entries one for the parent CBD and one for the child PDB and they look like this:

DB12C =
(PORT = 1521))
      (SERVICE_NAME = DB12C)

(PORT = 1521))
      (SERVICE_NAME = pdborcl)

So, if I connect as SYSTEM/password@DB12C I’m connected to the CDB and if I connect to SYSTEM/password@pdb I’m connected to the PDB.  When I connected to the PDB I could create a new user without getting an error.

But, when I first tried connecting to the PDB I got this error, even though the database was up:

ORA-01033: ORACLE initialization or shutdown in progress

So, to bring the database up (by the way, I’m on 64 bit Linux) after booting the Linux VM the following steps were required:

lsnrctl start
sqlplus / as sysdba
alter session set container=PDBORCL;

Interestingly there is only one pmon:

$ ps -ef | grep pmon
oracle   11865     1  0 09:12 ?        00:13:46 ora_pmon_DB12C

But you get different results when you query dba_data_files depending on whether connected to the CDB or PDB:





So, I guess each PDB has its own SYSTEM and SYSAUX tablespaces?

Lastly when running my scripts to poke around I edited my sqlplus header script to report which container you are in.  It looks like this now:

set linesize 32000
set pagesize 1000
set long 2000000000
set longchunksize 1000
set head off;
set verify off;
set termout off;

column u new_value us noprint;
column n new_value ns noprint;
column c new_value cs noprint;

select name n from v$database;
select user u from dual;

set sqlprompt &ns:&cs:&us>

set head on
set echo on
set termout on
set trimspool on

It puts out a prompt like this:






Oracle Database 12: Architecture Diagram

I found the following Database Architecture Diagram for Oracle Database 12c on Oracle’s website. It lists all the processes and the relationship between processes and other database components.



DB Architecture Diagram
And below is a YouTube link which gives database architecture overview.
Oracle Database 12c Architecture Overview