Multitenant Snapshot Copy
Snapshot clones are available with various techniques, like clonedb with 11.2.0.3 or the already mentioned software company Delphix. The most common ones are using storage technologies like ZFS or NetApp. Starting with Oracle 12.1.0.1 it was also possible using snapshot clones with pluggable databases within the multitenant database architecture. But it was limited to file systems that support sparseness and ACFS. With the first patch set 12.1.0.2 it’s possible to use direct NFS as well for snapshot copies. As direct NFS becomes more and more popular for database storage this is a real shift towards the usage of snapshot copies.
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