Introduction to Oracle Database 21c New Update Now Available On Oracle Cloud

Posted by vipul on February 13th, 2021

Oracle has introduced Oracle Database 21c “cloud-first” on Oracle Cloud for Database Cloud Service (Virtual Machine and Bare Metal) and Always Free Autonomous Database Service in some regions. However, It is yet to be released for on-premise and other cloud services.

Beginning with Prophet Data set 20c and now in Prophet Information base 21c, a multitenant holder data set is the solitary upheld design from this point forward. In the past deliveries, Prophet upheld non-holder data sets (non-CDBs), yet they are not, at this point upheld from 20c onwards.

CDBs: Compartment Data sets

A CDB contains at least one PDBs made by clients and application compartments. At the actual level, a CDB is a bunch of documents: control record, online re-try log records, and information documents.

PDBs: Pluggable Data sets

A PDB is a compact assortment of compositions, diagram objects, and non-outline protests that appears to an application as a different data set. At the actual level, each PDB has its own arrangement of information records that store the information for the PDB. The CDB incorporates all the information records for the PDBs contained inside it and metadata for the CDB itself.

To move or file a PDB, you need to unplug it first. An unplugged PDB comprises of the PDB information documents and a metadata record. An unplugged PDB should be connected to a CDB before you can utilize it.