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Category: DATABASE

Clone Oracle 12c Pluggable database from one Oracle Cloud Service to another

In this post we will be cloning  an Oracle Database 12c Pluggable Database from one Database Cloud Service to another.

We can have multiple options for doing this data migration. For our example we will use remote cloning of a PDB using Database Links. Note that this post will use the unique features of Oracle Database 12c Multitenant and Pluggable Databases (PDB). This was a new and the key feature of Oracle 12c which is not present in Oracle database version 11g.

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Transparent Data Encryption (TDE) – Oracle Database Cloud

Transparent Data Encryption (TDE) has been a standard feature of Oracle database for quite a long time. Since database in cloud is increasingly becoming popular so this feature has taken a great importance keeping in mind that primary concerns that administrators have in keeping data in cloud (remote) servers is security.

Oracle Advanced Security Transparent Data Encryption (TDE) stops would-be attackers from bypassing the database and reading sensitive information from storage by enforcing data-at-rest encryption in the database layer. In this post we are going to demonstrate how the Transparent Data Encryption ensures that the data stored in the Oracle Database is protected and cannot be accessed from malicious users that have gained access at the OS level.

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ORA-27300: OS system dependent operation:invalid_egid

In one of our EBS database we faced issue when connecting to SQLPLUS

Error message which was coming up was as below:

[oracle@dbserver bin]$ sqlplus apps/apps

Copyright (c) 1982, 2011, Oracle. All rights reserved.

ERROR:
ORA-27140: attach to post/wait facility failed
ORA-27300: OS system dependent operation:invalid_egid failed with status: 1
ORA-27301: OS failure message: Operation not permitted
ORA-27302: failure occurred at: skgpwinit6
ORA-27303: additional information: startup egid = 11 (asmadmin), current egid =
17 (oinstall)

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New features in Database 12c

Database 12c brought with it many new features. There are improvement in many areas and new concepts. Most notable is the concept of Container database and Pluggable database.

Container Databases (CBD) and Pluggable Databases (PDB) brings with it a radical change and a major change in the core database architecture. Besides this major change there are many other improvements that Database 12c has. Some of those new features are listed below:

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