Contents
How to create a securefiles lob table in Oracle?
Parameters of CREATE TABLE for SecureFiles LOB Parameter Description BASICFILE Parameter that specifies the original ar SECUREFILE Parameter that specifies SecureFiles LOB CHUNK Data size used by Oracle Database when a RETENTION Configures the LOB column to store old v
How are securefiles used in Oracle 11g database?
The first using the original storage method and the second using the SecureFile storage method. The DEDUPLICATE option of SecureFiles allows decuplication of entries within a LOB at the table or partition level.
What does it mean that Oracle securefiles lobs only logs metadata?
FILESYSTEM_LIKE_LOGGING means that the system only logs the metadata. This option is invalid for BasicFiles LOBs. This setting is similar to metadata journaling of file systems, which reduces mean time to recovery from failures. The LOGGING setting for SecureFiles LOBs is similar to the data journaling of file systems.
Can a lob be stored as a secure file?
The dynamic parameter DB_SECUREFILE is used to specify how to store large objects by default. LOBs can now be stored as securefiles or basicfiles. By default Oracle 11g allows for the use of both, securefile and basicfile lobs in the same database.
Which is the default storage in Oracle securefiles?
The original LOB storage architecture, BasicFiles LOBs, is the default storage. It is in effect if the keyword SECUREFILE is not used, or if the keyword BASICFILE is used in the CREATE TABLE statement. The following sections describe LOB storage characteristics used when designing, creating, and modifying tables with LOB column types.
Can you use securefiles lob storage in basicfiles?
You must use BasicFiles LOB storage for LOB storage in tablespaces that are not managed with Automatic Segment Space Management (ASSM). SecureFiles LOBs can only be created in tablespaces managed with Automatic Segment Space Management (ASSM), unlike BasicFiles LOB storage.
Which is the default lob storage in Oracle Database?
The CREATE TABLE statement added new keywords to indicate the differences: BASICFILE specifies BasicFiles LOB storage and SECUREFILE specifies SecureFiles LOB storage. Beginning with Oracle Database 12 c, SecureFiles LOB storage became the default in the CREATE TABLE statement.