10.9 Oracle Connection Manager Enhancements

Oracle Connection Manager proxies and screens request for Oracle Database Server.

• Oracle Connection Manager provides a more secure access to the server by supporting the Transport Layer Security (TLS) protocol. With this support, the database client can communicate to the server through Oracle Connection Manager over TCPS protocol. You can also configure the Oracle Connection Manager to have TLS connection on one side and non-TLS connection on the other side. This also acts as a secure way to hide the internal database servers for the outside clients connecting from the internet.

  Multiplexing: If the gateway already has the TCPS connection to the endpoint requested by the database client, then it multiplexes the new connect request on the same connection.

• It can listen on multiple protocol addresses. With multiple listening endpoints, Oracle Connection Manager is now able to support both TCP and TCPS at the same time. The existing single protocol address configuration is still supported. For example:

  CMAN_ALIAS=
   (configuration=
   (address_list=
   (address=(protocol=TCP)(host=a.b.c.d)(port=12522))
   (address=(protocol=TCPS)(host=a.b.c.d)(port=12523))
  )
  ..
  )
  

• It has the addition of network data compression facility to improve network throughput and make data transfer faster between the Oracle Database Client and the Oracle Database Server. This is done in different ways according to the database client, database server, and the next hop compression ability. Compression is enabled between any two nodes if it is negotiated by them

  If more than two consecutive nodes support and negotiate compression, such case is handled in a way that the intermediate node just relays the compressed data to the next node without performing decompression.

  Compression is supported between the Oracle Connection Manager and the server, even if the Oracle Database Client is earlier than the Oracle Database 12c release and cannot support compression.

• It supports up to 2 MB SDU enabling the Oracle Database Client and the Oracle Database Server to negotiate higher SDU when establishing connection through Oracle Connection Manager.

• Starting with this release, valid node checking for registration is enabled by default in Oracle Connection Manager. By default, only the databases on local node are allowed to register with Oracle Connection Manager. The databases on remote node can be permitted or denied to register with Oracle Connection Manager through the use of parameters REGISTRATION_INVITED_NODES and REGISTRATION_EXCLUDED_NODES.

• Starting with Oracle Database 21c, you can manage distribution of bandwidth across services using Oracle Connection Manager.

  Oracle Connection Manager has the following enhancements:

  • REST APIs for CMCTL Commands
  • GROUP syntax for rules
  • BANDWIDTH in bytes per second at service level