This feature will allow the Tungsten Connector to fall back to bridge mode if a user cannot be successfully authenticated through user.map.

The connector is able to employ a special fall-back bridge mode which allows for a hybrid configuration of both Proxy and Bridge modes. By default, the bridge mode fallback feature is disabled.

When fallBackBridgeMode is set to either RW_STRICT or RO_RELAXED, the Connector will first check the user.map file for an entry that matches the user name passed in the connection request. If a match is found in the user.map, the Connector will act in Proxy mode so the conversation with the client will be handled locally, and a new connection will be opened from the connector to the database server based on the normal Proxy mode routing rules. If the user name is not found in user.map, then the connector will act in Bridge mode, and the connection will be forwarded directly to the specified database server, either to the Primary (RW_STRICT) or to the Replica (RO_RELAXED) for handling with no intercept, just a TCP-layer packet routing. There will be no query interpretation or analysis, and no auto-reconnect, just failover handling.

For more information, see Section 7.5, “Using Bridge Mode”, and Section 7.6, “User Authentication”.

To enable Fall-Back Bridge Mode using the DB Primary:

Click the link below to switch examples between Staging and INI methods...

Show Staging

Show INI

shell> tpm query staging
tungsten@db1:/opt/continuent/software/tungsten-clustering-7.0.3-141

shell> echo The staging USER is `tpm query staging| cut -d: -f1 | cut -d@ -f1`
The staging USER is tungsten

shell> echo The staging HOST is `tpm query staging| cut -d: -f1 | cut -d@ -f2`
The staging HOST is db1

shell> echo The staging DIRECTORY is `tpm query staging| cut -d: -f2`
The staging DIRECTORY is /opt/continuent/software/tungsten-clustering-7.0.3-141

shell> ssh {STAGING_USER}@{STAGING_HOST}
shell> cd {STAGING_DIRECTORY}

shell> ./tools/tpm configure alpha \
    --property=fallBackBridgeMode=RW_STRICT \
    --connector-bridge-mode=false

Run the tpm command to update the software with the Staging-based configuration:

shell> ./tools/tpm update

For information about making updates when using a Staging-method deployment, please see Section 10.3.7, “Configuration Changes from a Staging Directory”.

shell> vi /etc/tungsten/tungsten.ini

[alpha]
...
property=fallBackBridgeMode=RW_STRICT
connector-bridge-mode=false

Run the tpm command to update the software with the INI-based configuration:

shell> tpm query staging
tungsten@db1:/opt/continuent/software/tungsten-clustering-7.0.3-141

shell> echo The staging DIRECTORY is `tpm query staging| cut -d: -f2`
The staging DIRECTORY is /opt/continuent/software/tungsten-clustering-7.0.3-141

shell> cd {STAGING_DIRECTORY}

shell> ./tools/tpm update

For information about making updates when using an INI file, please see Section 10.4.4, “Configuration Changes with an INI file”.

To enable Fall-Back Bridge Mode using a DB Replica (if available):

Show Staging

Show INI

shell> ./tools/tpm configure alpha \
    --property=fallBackBridgeMode=RO_RELAXED \
    --connector-bridge-mode=false

[alpha]
...
property=fallBackBridgeMode=RO_RELAXED
connector-bridge-mode=false

shell> ./tools/tpm configure alpha \
    --property=fallBackSSLToBridge=false

[alpha]
...
property=fallBackSSLToBridge=false