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Allow placement of tablespace BYTE and TEXT data in a separate dbspace from the table's base row data.

Allow specifying a normal dbspace for a BYTE or TEXT column to isolate IOs for the blob data from main row data for the table. This would be logged space just like IN TABLE as opposed to IN blobspace blob pages.

  • Avatar32.5fb70cce7410889e661286fd7f1897de Guest
  • Jun 2 2020
  • Under Review
Who would benefit from this IDEA? Any heavy use table with simple large objects that experience IO performance issues. Especially when the large object data is not always queried!
How should it work?

Perhaps the syntax might be:

colname BYTE IN TABLE USING dbspacename

or

colname BYTE IN TABLE( dbspacename )

or

colname BYTE IN TABLE FRAGMENT IN (dbspace1, dbspace2, dbspace3,...)

The FRAGMENT IN would only be ROUND ROBIN and the default if no dbspace is provided would continue to be the table's home dbspace(s).

With similar syntax for ALTER FRAGMENT ON BYTE/TEXT to allow for reorganization.

Idea Priority High
Priority Justification Reorganizing tables with logged simple large objects in table space is currently difficult and expensive. This would separate the reorganization of row data and large object data simplifying the operation.
Customer Name ASK Database Management - several clients
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