you may want to explain how this feature is implemented but I will assume it encrypts the filesystem, while Oracle has it's own Transparent Data Encryption solution if you use a 3th party solution then as far as Oracle is concerned it should be 'transparent' to Oracle meaning usual read / write calls to the OS should keep working, please check for impacts on I/O since asynch_io may no longer be possible which could affect performance. Oracle TDE supports hardware acceleration on certain CPU types and if the 3th party solution wants a chance to perform in the same ballpark (all else being the same) then check with them if they also support this,
Harm ten Napel
Thans Harm Joris ten Napel! I will research about asynch_io.
We would implement encryption at the ASM disk level. i.e.
1. allocate a new DISK
2. apply vormetric protection to the DISK
3. add the protected DISK to the DISKGROUP
4. drop one unprotected DISK and rebalance ASM
5. repeat 1-4 until all the disks are vormetric protected.
6. reboot and fail over test.
According to Vormetric, this is transparent to Oracle. It'll be interesting to see what the common issues are encountered in reality.