These I consider the most important points about Exadata Patching:
Where is the most recent information?
MOS Note 888828.1 is your first read whenever you think about Exadata Patching
What is to patch with which utility?
Expect quarterly bundle patches for the storage servers and the compute nodes. The other components (Infiniband switches, Cisco Ethernet Switch, PDUs) are less frequently patched and not on the picture therefore.
The storage servers have their software image (which includes Firmware, OS and Exadata Software) exchanged completely with the new one using patchmgr. The compute nodes get OS (and Firmware) updates with dbnodeupdate.sh, a tool that accesses an Exadata yum repository. Bundle patches for the Grid Infrastructure and for the Database Software are being applied with opatch.
Rolling or non-rolling?
This the sensitive part! Technically, you can always apply the patches for the storage servers and the patches for compute node OS and Grid…
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