Databases Reference
In-Depth Information
trieve an entire row. In archival mode, compression ratios of 15 times are typical. During
direct load operations, data is transformed into columnar format and compressed.
Figure 12-3. Oracle Exadata Database Machine
Other Exadata Storage Server software capabilities include smart scan offload for the
aforementioned HCC, smart scan offload for tables with more than 255 columns, smart
scan offload for encrypted tablespaces and columns, and offload to storage of data
mining scoring and other statistics.
In addition to performance benefits obtained from the Exadata Server Software, faster
querying of fully encrypted databases is possible because decryption processing is
moved into the processors in the Exadata Storage Server cells. SQL monitoring support
and I/O performance graphs for Exadata Storage are provided by Enterprise Manager
Performance Diagnostics.
