By Mouhamadou Diaw Oracle 12c introduces moving online datafile. One question we might ask is what about moving datafile online in a dataguard environment. In this blog we will do some tests Below our configuration, we are using oracle 12.2 DGMGRL> show configuration; Configuration – MYCONT_DR Protection Mode: MaxPerformance Members: MYCONT_SITE – Primary database MYCONT_SITE1 – Physical standby database Fast-Start…
By Mouhamadou Diaw The last day I was discussing with one colleague about database flashback for a pluggable database in a dataguard environment. I did some tests and I present results in this blog. Below our broker configuration. Oracle 12.2 is used. DGMGRL> show configuration; Configuration – MYCONT_DR Protection Mode: MaxPerformance Members: MYCONT_SITE – Primary database MYCONT_SITE1 – Physical standby…
By Mouhamadou Diaw In oracle documentation we can find this about snapshot standby: A snapshot standby database is a fully updatable standby database that provides disaster recovery and data protection benefits that are similar to those of a physical standby database. The concept of snapshot standby is that we can temporary convert a physical standby to an updatable database for…
By Mouhamadou Diaw In this blog I am going to share an issue I had when installing grid infrastructure 12.2 on Redhat 7.3. I was configuring grid infrastructure 12.2 for a standlone server. Below the release and the version of my operating system root@dbserver /etc $ cat redhat-release Red Hat Enterprise Linux Server release 7.3 (Maipo) root@dbserver ~ $ uname…
By Franck Pachot . Application Container brings a new way to share data among databases, and adds a new dimension to referential integrity. A foreign key in an application PDB can reference a row belonging to a root data link table. But then, should a delete on the root validate that there are no orpheans in the application PDBs? And…
By William Sescu My blog about listener rotation caused some discussion, which is great. 🙂 It sounds like an easy stuff, but in case of listener logging it isn’t. https://www.dbi-services.com/blog/oracle-12-2-how-to-rotate-the-12-2-listener-log-diag_adr_enabled_listener-off/ Many ways do exist to rotate the listener log, but I was trying to point out some issues, because there are a few, e.g. What happens when the log file…
By William Sescu Nowadays, since the cloud is becoming more and more important, the PL/SQL API’s become more and more important too. Fortunately, Oracle has quite a lot of them. E.g. How do you run a Data Pump export if you have no ssh connectivity to the server? You could use the old exp tool, which is still available even…
By William Sescu The listener log file contains a lot of very useful information, like the program which was used for the connection, the IP address where the connection is coming from, the OS user which was used on the client and many many more. 05-JUN-2017 12:36:19 * service_update * DBIT122 * 0 05-JUN-2017 12:36:19 * (CONNECT_DATA=(SERVICE_NAME=DBIT122_SITE1_DGMGRL)(UR=A)(CID=(PROGRAM=sqlplus@dbidg01)(HOST=dbidg01)(USER=oracle))) * (ADDRESS=(PROTOCOL=tcp)(HOST=192.168.56.201)(PORT=42619)) *…
By Franck Pachot . 12.1 introduced Unified Auditing where you define policies and then enable them. As with the traditional audit, you enable them for all users or for specific users. The unified auditing adds a syntax to audit all users except some listed ones. 12.2 adds a syntax to audit a group of users, defined by the role granted.…
By Franck Pachot . When cloning a PDB from a remote CDB you need to define a database link to be used in the CREATE PLUGGABLE DATABASE … FROM …@… command. The documentation is not completely clear about the privileges required on the source for the user defined in the database link, so here are the different possibilities. Remote clone…
By Franck Pachot . In a previous post, I explained that Cross-PDB DML, executing an update/delete/insert with the CONTAINERS() clause, seems to be implemented with implicit database links. Connecting through a database link requires a password and this blog post is about an error you may encounter: ORA-01017: invalid username/password; logon denied This blog post also explains a consequence of…
By William Sescu Have you ever experienced the following error? SQL> alter pluggable database pdb2 open; alter pluggable database pdb2 open * ERROR at line 1: ORA-44304: service does not exist ORA-44777: Pluggable database service cannot be started. The error says, that Oracle is not able to open the pluggable database because a service is missing. At least the default…
