Pluggable Databases

12cR2 PDB refresh as a poor-man standby?

By Franck Pachot . Disclaimer My goal here is only to show that the Refreshable PDB feature works by shipping and applying redo, and then can synchronize a copy of the datafiles. I do not recommend to use it for(…)

Which privilege for CREATE PLUGGABLE DATABASE from DB LINK?

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(…)

12cR2 Cross-container DML – insert into container()

By Franck Pachot . Multitenant has been introduced in 12.1.0.1 with the goal to share resources but isolate data. However, having all PDBs in the same root may be convenient to manipulate data in multiple PDBs. In the first patchset,(…)

Can you open PDB$SEED read write?

By Franck Pachot . If you are in multitenant, you probably already felt the desire to open the PDB$SEED in READ WRITE mode. Can you open PDB$SEED read write yourseld? Yes and No. Should you open PDB$SEED read write yourself?(…)

12cR2 partial PDB backup

By Franck Pachot . I had a recent question about the following mention from the 12cR2 Multitenant book, about Partial PDB backups: . Here is an example in 12.2 with local undo to illustrate the(…)

Data Pump LOGTIME, DUMPFILE, PARFILE, DATA_PUMP_DIR in 12c

By Franck Pachot . Data Pump is a powerful way to save data or metadata, move it, migrate, etc. Here is an example showing few new features in 12cR1 and 12cR2.

Service “696c6f76656d756c746974656e616e74” has 1 instance(s).

By Franck Pachot . Weird title, isn't it? That was my reaction when I did my first 'lsnrctl status' in 12.2: weird service name... If you have installed 12.2 multitenant, then you have probably seen this strange service name registered(…)

Oracle 12cR2, RAC, Cloud, ACFS, PDB thin clones and asmadmin

By Franck Pachot . In the Oracle Public Cloud, fast provisioning gets all its meaning when creating a RAC database service: in one hour you can get an operational highly available multitenant database. You can even create it in Data(…)

12cR2: lockdown profiles and ORA-01219

By Franck Pachot . When you cannot open a database, you will get some users unhappy. When you cannot open multitenant database, then the number of unhappy users is multiplied by the number of PDBs. I like to encounter problems(…)

12cR2 DBCA can create a standby database

By Franck Pachot . Do you like DBCA to create a database from command line, with -silent -createDatabase? On a simple command line you can provision a database, with oratab, tnsnames.ora directory creation and any setting you want. And you(…)