Marc Wagner

ZDM Physical Online Migration – A success story

I have been recently blogging about ZDM Physical Online Migration where I was explaining this migration method and preparing customer On-Premises to ExaCC migration. See my blog, https://www.dbi-services.com/blog/physical-online-migration-to-exacc-with-oracle-zero-downtime-migration-zdm/. I have now had the opportunity to migrate(…)

ZDM Physical Online Migration failing during ZDM_SWITCHOVER_SRC phase

When using ZDM for a Physical Online Migration, even in the last current version, 21.4.5.0.0, switchover is failing. In this blog, I will share the reason and the solution to solve the problem before moving forward with the migration.

Patching Oracle databases with Nutanix NDB

A few years back I had the great opportunity to test Nutanix NDB, at that time called Nutanix Era, and I had written a few blogs about provisioning Oracle databases, taking snapshot, log catchup, cloning a database, restoring a database,(…)

Migration from Non-CDB to Multitenant : CDB is using local undo, but no undo tablespace found in the PDB

During a past migration test from on-premises to ExaCC, I faced a pdb violation, stating, CDB is using local undo, but no undo tablespace found in the PDB, after having run noncdb_to_pdb.sql script. Explanation The problem comes from the fact(…)

Migration from Non-CDB to Multitenant : Wallet Key Needed

I have been recently able to make several migration tests from On-Premises to Exadata, and during some of my tests I faced a PDB_PLUG_IN_VIOLATIONS with cause been “Wallet Key Needed” when converting a migrated Non-CDB to PDB. Explanation This violation(…)

Physical Online Migration to ExaCC with Oracle Zero Downtime Migration (ZDM)

A while ago I had been testing and blogging about ZDM, see my previous articles. And I finally had the chance to implement it at one of our customer to migrate on-premise databases to Exadata Cloud @Customer. After having been(…)

Logical Offline Migration to ExaCC with Oracle Zero Downtime Migration (ZDM)

A while ago I had been testing and blogging about ZDM, see my previous articles. And I finally had the chance to implement it at one of our customer to migrate on-premises database to Exadata Cloud @Customer. In this article(…)

Oracle ZDM Migration – java.security.InvalidKeyException: invalid key format

ZDM tool migration requires SSH Passwordless Login without passphrase between ZDM Host, the source and the target. Configuring appropriate keys might still result in a java security exception on this one. In this blog I will tell you how to(…)

dbvisit StandbyMP with OracleSE2 – dbvnet port problem

I’m currently working on a customer project, where we have 2 old Lenovo Servers, one ODA X7-2M and another ODA X8-2M. In the new project, we are replacing the 2 old Lenovo Servers by 2 new ODA X9-2L. The production(…)

dbvisit StandbyMP with Oracle SE2 – switchover error with ORA-27125

After having recently deployed a new customer system running Oracle SE2 databases in Disaster Recovery environment using dbvisit StandbyMP v11.4.1 on Oracle Linux 8.8, I did some final test running a switchover. The switchover failed with following error: ORA-27125: unable(…)