Bryan's Oracle Blog

Expert insights on Oracle Database, Zero Data Loss Recovery Appliance (ZDLRA), backup and recovery strategies, database security, and enterprise database solutions by Bryan Grenn.

Thursday, February 12, 2026

Sudden ORA-12578: TNS:wallet open failed when logging in as SYS

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ORA-12578: TNS:wallet open failed when logging in as SYS This blog post covers a possible cause of a "ORA-12578: TNS:wallet open failed...

Tuesday, January 20, 2026

Oracle Database Encryption (TDE)

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Oracle TDE (Transparent Data Encryption) is a critical piece of data protection, and online encryption is a great tool you can use to simpli...

Tuesday, October 28, 2025

Configuring Cloud Protect

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Cloud Protect is a new offering announced at AI World 2025. Cloud Protect allows you to leverage the Oracle Database Zero Data Loss Autono...

Monday, October 6, 2025

ZDLRA best practices

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ZDLRA best practices (updated 2025) I have seen a lot of changes with the ZDLRA over the last 10 years or so, and because of that I wanted ...

Monday, September 29, 2025

Oracle DB 23ai supports external Apache Iceberg tables

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One area that I have been spending a lot of time on is accessing data stored in object storage from within Oracle DB 23ai using external ta...

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