By Franck Pachot . I usually explain that the main point about Multitenant Architecture is the separation of roles between a system DBA who manages the container, and is responsible for its availability, and application DBA who owns all the application objects, and is responsible for data integrity and performance. The Exadata Express Cloud Service is the implementation of that:…
By Franck Pachot . In a previous post I explained how the AWR views have changed between 12.1.0.1 and 12.1.0.2 and now in 12.2.0.1 they have changed again. This is a good illustration of multitenant object link usage. What’s new in 12cR2 is the ability to run AWR snapshots at CDB or PDB level. I really think that it makes…
By Franck Pachot . In a previous post I explained how to use transportable tablespace from a standby database. Here I’m showing an alternative where you can transport from a backup instead of a standby database. RMAN can do that since 10gR2. Transportable Tablespace is a beautiful feature: the performance of physical copy and the flexibility of logical export/import. But…
By Franck Pachot . Here it is. The multitenant book is out for sale… One year ago, at DOAG2015, Vit Spinka came to me with this idea: with Anton Els they planned to write a book on multitenant and proposed me to be a co-author. I was already quite busy at that time and my short-term plan was to prepare…
By Franck Pachot . Today at UKOUG TECH16 conference I’m presenting the internals of the new multitenant architecture: 12c Multitenant: Not a Revolution, Just an Evolution. My goal is to show how it works, that metadata links and object links are not blind magic. Here are the links to the blog posts I’ve published about multitenant internals. The dictionary separation,…
By Franck Pachot . Oracle Transparent Data Encryption is available without option on the Oracle Public Cloud: Standard Edition as well as Enterprise Edition (EE, EE-HP EE-EP, ECS). More than that, the DBaaS enforces TDE for any user tablespace even when not specifying in the CREATE TABLESPACE. It you are not familiar with TDE key management (wallets) then you have…
By Franck Pachot . Upgrading from 12.1 to 12.2 is easy in Oracle Public Cloud DBaaS because you are in multitenant. Here is how to clone a 12.1 PDB to 12.2 service. I’ve a service HP121 in 12.1.0.2 with one pluggable database PDB1 and a service HP122 in 12.2.0.1 with an empty CDB (only CDB$ROOT and PDB$SEED containers). Export TDE…
By Franck Pachot . In the previous post I described how simple it is to unplug a PDB and plug it into a newer version CDB. One goal of dictionary separation in the multitenant architecture is to keep system objects on CDB$ROOT only. Knowing that an upgrade does not touch the application metadata and data, does this make PDB upgrade…
By Franck Pachot . 12.2 is available in the Oracle Public Cloud DBaaS. If you have a 12.1 DBaaS service, there’s no button to upgrade it. I’ll describe all the possible upgrade procedures and the first one, and the most simple, is to create a new DBaaS service in 12.2 and unplug/plug the PDBs to it. Here is my DBaaS…
By Franck Pachot . Now that 12.2 is there, in the Oracle Public Cloud Service, I can share the slides of the presentation I made for Oracle Open World: 12cR2 Single-Tenant: Multitenant Features for All Editions from Franck Pachot I’ll give the same session in French, In Geneva on November 23rd at Oracle Switzerland. Ask me if you want an…
By Franck Pachot . Oracle database 12.2 is there on the Database Cloud Service, in multitenant. In EE High Performance or Extreme Performance, you have the multitenant option: you can create 4096 pluggable database (instead of 252 in 12.1). If you are in lower services, you can create only one user PDB (not counting application root and proxy PDB). If…
By Franck Pachot . Here is, in my opinion, the most beautiful feature of the multitenant architecture. You know how I love Transportable Tablespaces. But here: No need to put the source in read/only No need to export/import the metadata logically No need for any option: available even in Standard Edition Standard Edition I am in Standard Edition here in…
