16.10 - Multiple Statement Requests - Parallel Transporter

Teradata Parallel Transporter Reference

Product
Parallel Transporter
Release Number
16.10
Published
July 2017
Content Type
Programming Reference
Publication ID
B035-2436-077K
Language
English (United States)

The Stream operator sends conventional CLIv2 parcels to the Teradata Database that are immediately applied to the target table(s). To improve efficiency, the Stream operator builds multiple statement requests and may also employ a serialize mechanism to help reduce locking overhead.

The most important technique used by the Stream operator to improve performance is the multiple statement request. Placing more statements in a single request is beneficial for two reasons. It reduces:

  • Network overhead because large messages are more efficient than small ones.
  • Robust mode recovery overhead to one extra restart log table row for each request.

The Stream operator packs multiple statements into a request based upon the Pack attribute specification.