Rolling or Non-Rollling Patch

Rolling Patch:

Patch implements on servers one at a time.No downtime required.But it takes much more time and you may need to apply Grid/Rdbms patch as a prerequisite.If your ASM redundancy is NORMAL,during cell storage patch if any disk failure on failure group (the cell which not patched yet running as a single ASM extent) you may loose data.

Oracle recommends rolling patch when you have HIGH redundancy. Today’s disk technology is very good.You may ignore it.

Rolling Patch:

Patch implements on servers simultaneously.Downtime required.It takes less time.

 

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