Dbvisit Standby 9.0.22 (16 Oct 2023) Released



There is a number of changes being introduced with each update.  Some updates may come with specific requirements.

  • Please note that Dbvserver (Central Console) will not be able to install on Solaris and AIX based systems.
  • The Central Console must be installed on a Linux or Windows-based system (Linux recommended).
  • Dbvisit Observer (Auto-Failover tool) must be installed on a Linux or Windows-based system only.

Known Issues

It is possible that some of the release updates will include known issues.  This section should be reviewed for any new release.  

Solaris and AIX 

It is important to take note of the following:

  • Dbvisit Standby can be installed and used on Solaris based systems (Solaris 10+) with the exception that the Central Console (Dbvserver) must be installed and running on a Linux or Windows-based system.
  • Dbvserver (Central Console) cannot be installed on Solaris and AIX based systems.
  • Dbvisit Observer (Auto-Failover tool) cannot be installed Solaris and AIX based systems.


  • Dbvisit Standby currently only supports ipv4, not ipv6.
  • It was noted that on windows ipv6 may be favoured and if the hostname resolution is not ipv4, Dbvnet, Dbvserver and Dbvagent might listen on ipv6 when started.
  • It is recommended to make sure the hostnames used in the Dbvisit Standby configurations, resolve to an ipv4 address and not ipv6.
  • If Dbvnet, Dbvserver and Dbvagent are not able to listen on ipv4 due to name resolution favouring ipv6, you will have to make use of ipv4 IP addresses in the Dbvnet, Dbvagent, Dbvserver configuration files as well as your Dbvisit Standby DDC file (for the SOURCE and DESTINATION)
  • Using the following commands after starting Dbvnet, Dbvagent and Dbvserver, you will be able to identify if it is listening on ipv4 or ipv6:
    • Dbvnet:   netstat -an|findstr 7890
    • Dbvagent:  netstat -an|findstr 7891
    • Dbvserver: netstat -an|findstr 4433
  • Oracle Instant Library Issues
    • Dbvisit Standby includes Oracle 12.1 Instant Client libraries by default. If your system has a different version of Oracle installed, it is possible under some rare circumstances for a library version conflict to occur. If you experience any errors similar to "PRKN-1008 : Unable to load the shared library orasrvmhas12.dll", you can usually resolve them easily by renaming this library in the dbvisit/standby folder to "orasrvmhas12.dll.12.1" or by using replacing the 12.1 Instant Client libraries in dbvisit/standby or dbvisit/standby/lib (depending on your operating system) with the 12.2 equivalent files. Please do not change any of these libraries in your Oracle Database Installation.

Change Log

Important Notes  

  • Oracle 10gR2 ( is now supported - using the latest patch set is required
      • This excludes Oracle 10g RAC configurations which are not supported
      • If using Oracle ASM - the version of ASM must be 11.2 and above (Graceful Switchover will not be possible if ASM version of 10.2 is used)
  • Using SSH as communication between primary and standby hosts is fully supported. The default is to use Dbvnet, but SSH password-less communication is still supported. 
  • Oracle Instant Library Issues
    • Dbvisit Standby includes Oracle 12.1 Instant Client libraries by default. If your system has a different version of Oracle installed, it is possible under some rare circumstances for a library version conflict to occur. If you experience any errors similar to "PRKN-1008 : Unable to load the shared library orasrvmhas12.dll", you can usually resolve them easily by renaming this library in the dbvisit/standby folder to "orasrvmhas12.dll.12.1" or by using replacing the 12.1 Instant Client libraries in dbvisit/standby or dbvisit/standby/lib (depending on your operating system) with the 12.2 equivalent files. Please do not change any of these libraries in your Oracle Database Installation.

9.0.22 (16 October 2023)


9.0.20 (14 January 2021)

Dbvisit Standby Snapshot option

STDBY-763: Improved interaction of Snapshot creation and Parallel Recovery
STDBY-613: Added new options for setting custom DB_DOMAINS on Snapshots

Dbvisit Standby

STDBY-802: Improvements and fixes for DDC parameter handling during Graceful Switchover on RAC environments
STDBY-788: Added handling for historical Tasks with missing timestamps
STDBY-783: Graceful Switchover is now possible on Windows environments with both Oracle Unified Auditing and Oracle versions 12.1 and lower
STDBY-785: Observer will no longer send emails for all monitored DDCs when only one is updated
STDBY-775: Improved Mail function logging


9.0.18 (27 October 2020)

New Feature:

Oracle Unified Auditing support - Graceful Switchover now fully supports Oracle Unified Auditing.

New separate mail notification address options (Success, Error, Heartbeat, Alert, Log Gap)


Dbvisit Standby Snapshot option

DS9-505: Dbvisit Snapshots - Databases inside Single Snapshots can now be manually stopped/started
DS9-651: Dbvisit Snapshots - Improved archive log apply process when done in conjunction with a pre-processing script
DS9-638: Dbvisit Snapshots - Improved edge-case handling of in-Snapshot database state changes

Dbvisit Standby

DS9-698: Dbvnet now capable of advanced automatic network error resolution, making connections and remote executions more robust
DS9-699: New auto-retry logic making log file transfers more reliable on unstable networks
DS9-653: Sensitive user information (such as email passwords) now always encrypted in configuration files
DS9-703: Dbvserver now supports HTTP Strict Transport Security
DS9-714: It is now possible to Cancel Tasks that are in a Paused state, e.g. CSD/Sync using transportable media
DS9-663: Added timestamps to all Task progress messages
DS9-615: Improved pre-check handling/user input validation for DR Testing
DS9-364: Create Standby Database process now possible using non-compressed backups
DS9-706: Graceful Switchover will no longer create two Tasks in the GUI instead of just one


9.0.16 (22 July 2020)

New Feature:

Advanced Task Tracking - Tasks in the Dbvisit Standby Central Console now offer significantly more information about database events, including accurate tracking of who/what initiated the Task, allowing Tasks to be stopped/terminated right from the Central Console, offering guidance on a variety of possible error states, and retaining relevant process information even after a host-side process crash.

Dbvisit Standby
DS9-666: Security improvements for handling connection to the Oracle database
DS9-636: Significantly reduced chances of Dbvisit Standby sqlite database locking under heavy workloads
DS9-643: Enabled the Create Standby Database process to more gracefully handle various errors during the creation of the standby database
DS9-633: Improved handling of backups for databases using RMAN BACKUP OPTIMIZATION
DS9-646: Changed Dbvisit services to startup type Automatic Delayed on Windows systems
DS9-604: AMM log maintenance improved after Graceful Switchover
DS9-652: Dbvisit Observer can now connect to mailservers through SSL, including new optional settings to ignore certificate errors for connection test purposes
DS9-644: Improved Dbvisit Observer behaviour when working with very slow mailservers
DS9-657: Improved Japanese translations
DS9-671: Better display for Task errors caused by manual user interactions (e.g. kill signals)


9.0.14 (28 May 2020)

New Feature:

We now provide the capability for different network ports for primary and standby configurations allowing management of DR environments across different network segments.


Dbvisit Standby Snapshot Option

DS9-603: Dbvisit Snapshot Groups information now updates more frequently and handles more potential database states
DS9-610: Creation of up to 4 Snapshots in a Snapshot Group is now possible

Dbvisit Standby

DS9-629: Fixed several memory leaks in dbvagent & dbvserver executables, especially affecting Windows installations
DS9-512: File handling operations during periods of inconsistent network connection are now more robust
DS9-599: Added support for using ACFS when using Oracle RAC (please note that using ASM for Oracle RAC is still the recommended option)
DS9-515: Fixed inconsistent DR Test behaviour on environments hosting multiple DDCs sharing the same database name
DS9-526: Introduced new NETPORT_DR parameter in DDCs to enable independant custom port configurations on both Primary & Standby
DS9-533: Improved Japanese language translation
DS9-597: Improvements to functionality and clarity of the ntf_repo_maintain function to enable easier Task clearing/maintenance


9.0.12 (9 April 2020)

New Features:

Dbvisit Snapshots now support the use of custom database parameters
Dbvisit Snapshots can now execute custom pre/post-processing scripts during each Snapshot creation


Dbvisit Standby Snapshot Option

DS9-537: Ensured activation process will always start regardless of Snapshots state
DS9-531: Fix Snapshot creation failure if Volume Group contains an extra dash "-"

Dbvisit Standby
DS9-503: Changing database state (e.g. RW/RO) now also affects all related PDBs
DS9-509: Fixed rare Windows installation error
DS9-513: Improved support for the APPLY_DELAY_LAG_MINUTES setting on 19c
DS9-527: Improved handling of log shipping after Graceful Switchover on Windows RAC environments
DS9-521: Include the Disaster Recovery Test repository in the Dbvisit Support Package
DS9-532: Updated descriptions and text prompts for Log Gap Report to be more clear on Standby sequence state
DS9-534: Dbvisit Support Packages can now be created even if the database is down
DS9-472: Improved dbvnet & dbvagent logging and error handling

 9.0.10 (4 March 2020)


Dbvisit Standby Snapshot Option

DS9-483: Snapshots created as part of a Snapshot Group can now have activated (i.e. read-write) databases
DS9-487: Significantly improved error reporting for Snapshot functionality
DS9-492: Improved Snapshot Alerts behaviour and timeliness

Dbvisit Standby

DS9-478: Updated Dbvisit-provided SSL security certificates
DS9-438/495: Improved Task type and source reporting, added new Task types and new distinctions between User (GUI), Daemon and CLI Tasks
DS9-446: Resolved all LIBPATH issues on AIX systems
DS9-479: dbvnet can no longer over-utilize CPU on AIX systems
DS9-488: MAXDATAFILES value now taken from the origin database during control file creation
DS9-497: Made the behaviour/distinction between the "dbvctl -c" and "dbvctl -C" commands more intuitive
DS9-468/499: Improved clarity of terms and parameter descriptions in the Dbvisit product installer
DS9-269: Opening databases RO through the GUI now also causes all PDBs to open read only also

9.0.08 (6 December 2019)


DS9-306: The dbvctl upgrade procedure now requires confirmation that it is being executed on the primary location, in order to avoid erroneous executions on standby
DS9-323: Dbvisit Observer now has more available actions through the Central Console for resolving various error states
DS9-381: Improved special-case error messaging for the Dbvisit Snapshots Utility, e.g. attempted use of the Apply Log Gap parameter
DS9-382: Added new example Dbvisit Observer Custom User Script for Windows
DS9-398: Disaster Recovery Testing functionality made more robust & reliable, especially in ASM environments
DS9-401: Improved UX of DDC/CSD parameter editing through the Central Console
DS9-435: Improved consistency for Central Console reporting of CLI-generated Tasks
DS9-449: Improved Dbvisit Observer's ability to handle monitoring multiple DDCs at the same time
DS9-448: CSD creation can now be run from template data stored in a JSON file (using the -j option)
DS9-453: Improved licence key parameters visibility - the Licence page will now display any available permissions for extra features, e.g. Dbvisit Snapshots
DS9-471: Improved error reporting for attempting to create Snapshots on unsupported environments, e.g. Windows or non-LVM systems.


9.0.06 (18 November 2019)


Dbvisit Snapshots - Quickly create automated snapshots of your standby databases


DS9-298: Dbvisit Observer now allows sendmail interaction on port 25 without AUTH
DS9-398: Extended length backup image file names now supported
DS9-399: MAILCFG_FORMAT DDC parameters now editable through the Central Console


9.0.04 (10 October 2019)


Dbvisit Observer is now also available for Windows systems


DS9-245: Long DDC/Hostnames should now display nicely on Manage Configurations & Manage Databases pages
DS9-265: The Installed Databases dropdown during DDC creation should now correctly populate on Windows systems
DS9-281: Running Graceful Switchover should now always cause the Central Console to auto-update the Host relationship
DS9-308: Daemon commands from the Manage Databases page will now always execute correctly on all supported operating systems
DS9-310: Dbvisit Observer logs will now by default go into the same directory as the executable
DS9-312: "User"-level accounts can now create DDCs between Hosts linked to the User's account
DS9-313: Add New Host quick-guide now appears correctly
DS9-314: DMN_MAX_FAIL_NOTIFICATIONS now always works as intended
DS9-318: Dbvisit Observer actions are now correctly hidden from "User"-level accounts
DS9-324: Support Packages are now correctly generated in cases of remote execution errors
DS9-332: dbvagent now capable of handling multiple simultaneous Task requests
DS9-358: DDC version records on the webserver are now always correctly updated after upgrading DDCs
DS9-360: It is no longer possible to delete DDCs before disabling Dbvisit Observer monitoring

9.0.02 (15 July 2019)


1. New Dbvisit Observer component - remotely monitor your Dbvisit Standby Configurations (DDCs), and auto-failover if necessary
2. New languages - added Chinese Traditional & Chinese Simplified to the available Central Console (GUI) language options

DS9-266: Oracle Real Application Cluster (RAC) databases now correctly open in read-only mode
DS9-283: Log gap report is now correctly attached to scheduler emails
DS9-243: Password files now correctly copied into Oracle Automatic Storage Management (ASM), if used
DS9-235: The Disaster Recovery (DR) Test option can now be run in batch mode from the Command Line Interface (CLI)
DS9-234: The read-only test "ro_test" can no longer be run on the primary system using the CLI


9.0.00 (31 May 2019)


1. New Central Console look and feel - better performance and usability
2. New Central Console languages - now available in English, French, German, Spanish and Japanese
3. New Improved and streamlined Create Standby Database (CSD) process
4. New Disaster Recovery Actions functions - easily test whether your environment is ready to switchover, without affecting your Source location (this includes the option to create backups prior to activation)
5. New Alert notifications in Central Console - automatic notifications and event tracking in case of important events, e.g. log gap threshold exceeded
6. New Interactive graphs - statistical information available for host/CPU load and DDC log time gap
7. New User guides - not sure how to perform a CSD, Sync or other action? Let our new interactive guide system lead you through it step by step.
8. Command Line Interface (CLI) core tasks will now be pushed to Central Console, making CLI tasks visible in the Console
9. Better emails - introducing HTML templates
10. Hundreds of minor improvements to usability, stability, performance and customisation

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