We made a migration from Oracle 10 to 11.2. Our lob objects are currently stored in the original LOB storage architecture. But 11g introduced the SecureFile storage architecture and we want to use its compression feature.
For non-LOB objects we can use something like dbms_compression.get_compression_ratio to get compression ratio and forecast estimated space usage.
What is analog for LOBs? Os it impossible to check the compression ratio before converting from basic LOB architecture to SecureFile?