Oracle 12c Pluggable Database – Plug Unplug and Clone

February 25, 2013 by 2 Comments 

My presentation of Oracle 12c Pluggable Database feature at DOAG

My presentation of Oracle 12c Pluggable Database feature at DOAG

Last week I gave a presentation called “12c Pluggable Database Feature Insights”at the German Oracle User Group (DOAG) regional meeting in Nuremberg. Not only the presentation itself but also a later discussion was very interesting and valuable. I encourage my nearby German colleagues joining DOAG and visiting regular Regional DOAG meetings in Nuremberg.

Let’s continue my series of articles on Oracle 12c Pluggable Database feature including SQL code.  I strongly recommend first reading my previous articles on this topic to understand the rest of the material:
Oracle 12c Pluggable Database is a fundamental architectural change
Oracle 12c Pluggable Database feature insights
Oracle 12c Pluggable Database (PDB) feature hands-on experience

This time I’ll show how to plug a Pluggable Database (PDB) into another Container Database (CDB), how to clone PDBs and how to adopt non-CDB as a PDB into a pre-existing CDB. To start with, I will use a Pluggable Database MY_PDB which I unplugged in my previous article and will plug it into another Oracle 12c Container database called cdb2. Read more »

How to fix ORA-12547 TNS lost contact when try to connect to Oracle

November 23, 2012 by 35 Comments 

Issue / Oracle error

sqlplus scott/tiger
SQL*Plus: Release 10.2.0.5.0 - Production on Wed May 18 09:32:35 2011
Copyright (c) 1982, 2010, Oracle.  All Rights Reserved.
ERROR:
ORA-12547: TNS :lost contact when try to connect to Oracle.

Issue description

I saw that TNS connection issue along with ORA-12547 Oracle error several times, usually when trying to connect to Oracle database server on Unix / Linux host with an OS user that does not belong to oinstall group (Oracle binaries owner group).  In this case, interesting enough that local TNS connection to database (when using tnsnames alias) works fine: Read more »

How to make HP-UX Korn shell similar to Linux Bash

October 26, 2012 by 2 Comments 

Working as Oracle DBA on HP-UX and Linux both I prefer Bash shell which is available on Linux compared to Korn shell which is default shell on HP-UX. It’s more convenient to work on Linux Bash using handy key combinations, etc. Unfortunately Bash is not installed on HP-UX by default and also not officially supported there – you will not get help from HP support if problems with it arise.

Nevertheless, I could find a way of improving environment settings on HP-UX to make the backspace and some other keys work similar to Linux and Bash shell. Read more »

How to export public database objects with Oracle Data Pump

January 20, 2012 by Leave a comment 

Neither original Oracle Export (exp) utility nor Data Pump (expdp) can capture related public Oracle database objects during schema(s) export. During the schema(s) copy or refresh you have to transfer them to the target database manually BEFORE the import to avoid related import errors. These public objects are: Read more »

Enable new ASM features in Oracle Grid Infrastructure 11gR2

December 2, 2011 by 4 Comments 

Oracle GRID Infrastructure 11gR2 introduces many great ASM features. However most of them are disabled by default even if you run Oracle 11gR2 database on it. Below I share some clarify on how to enable new ASM 11g features for your 11g database. Read more »

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