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Pierre Sicot

UKOUG Super Sunday

By | Database Administration & Monitoring | No Comments

Today at the UKOUG Super Sunday in Birmingham, I had the opportunity to assist at interesting conferences. The first presentation was about Oracle RAC internals and its new features in version 12.2.0.1 on Oracle Cloud. The main new features concern the cache fusion, the undo header hash table, the leaf nodes, and the hang manager. In 12c release 2 in a RAC environment, the cache fusion automatically chooses an optimal path; the cache fusion collects…

 
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Franck Pachot

12cR2: Upgrade by remote clone – workaround ORA-17630 in DBaaS

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Easier than unplug/plug, you can move pluggable databases with remote cloning. It’s the same idea but you don’t have to manage the files yourself: the are shipped through database link. However, this uses the ‘remote file protocol’ and it fails with version mismatch: ORA-17628: Oracle error 17630 returned by remote Oracle server ORA-17630: Mismatch in the remote file protocol version client server  

 
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Franck Pachot

12cR2: CREATE_FILE_DEST for PDB isolation

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Two years ago I filled an OTN idea to ‘Constrain PDB datafiles into specific directory’ and made it an enhancement request for 12c Release 2. When you provision a PDB, the PDB admin can create tablespaces and put datafiles anywhere in your system. Of course this is not acceptable in a cloud environment. 12.1 has a parameter for directories (PATH_PREFIX) and 12.2 brings CREATE_FILE_DEST for datafiles.  

 
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