|Oracle Automatic Data Optimization (ADO)
|Purpose||Work is still in progress on this page|
|Description||We just won the acronym sweepstakes with a number of new capabilities added to our favorite database each with its very own acronym and no shortage of confusion as to how all of these pieces work together.
ILM stands for Information Lifecycle Management and to quote the Oracle docs:
"To implement your ILM strategy, you use Heat Maps in the database to track data access and modification. You can also use Automatic Data Optimization (ADO) to automate the compression and movement of data between different tiers of storage within the database. The DBMS_ILM package supports immediate evaluation or execution of Automatic Data Optimization (ADO) related tasks. The package supports the following two ways for scheduling ADO actions.
The following procedures support the two usage modes. Before describing the procedures, we introduce the notion of an ADO task as an entity that helps to track a particular evaluation or (an evaluation and execution) of ADO policies. A particular ADO task could be in one of the following states.
|Tablespace level policy||ALTER TABLE [<schema_name.>]<table_name> ILM ADD POLICY <policy_name>;|
|ALTER TABLE uwclass.servers ILM ADD POLICY tier to ilmtbs;|
|Compress a table after there have been no modifications for one week||ALTER TABLE [<schema_name.>]<table_name> ILM ADD POLICY ROW STORE COMPRESS
ADVANCED <ROW | SEGMENT> AFTER <integer> DAYS OF NO MODIFICATIONS;
|ALTER TABLE uwclass.servers ILM ADD POLICY ROW STORE COMPRESS
ADVANCED segment AFTER 7 DAYS OF NO MODIFICATIONS;
|Compress rows after one week of not being updated||ALTER TABLE uwclass.servers ILM ADD POLICY ROW STORE COMPRESS
ADVANCED row AFTER 7 DAYS OF NO MODIFICATIONS;
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