The Zero-ETL Approach: Enhancing Data Agility and Insight
Flash Usage Models for the Oracle Database
1. Flash Usage Models for the Oracle Database
• Transparent disk replacement for databases
– One for one replacement for conventional disks
– Array caching layer
– Auto-tiering storage layer
Flash storage is transparent to the database and managed by the
storage layer. The management of flash storage does not possess
knowledge for how the database functions.
• Fast storage managed by the database kernel
– Database Smart Flash Cache
– Exadata Smart Flash Cache
With respect to the management of flash storage, there is significant
value of having internal knowledge of the database’s functionality.
2. Database Smart Flash Cache
Access Buffer Cache
-> Flash Cache
SGA SGA
Hot Data Hot Data
Warm Data Warm Data
If not enough space in
Cold Data “Buffer Cache”, then
write “Clean Block” to Cold Data
“Flash Cache”
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