HiRDB uses global buffers to manage database input/output processes. This section explains the HiRDB database access processing method that uses global buffers. HiRDB provides the following facilities to improve the performance of the database access processing method:

• Global buffers
• Prefetch facility
• Asynchronous READ facility
• Deferred write processing
• Facility for parallel writes in deferred write processing
• Incorporation during commit
• LRU management of global buffers
• Page access using the snapshot method
• Local buffers
• Global buffer pre-writing
• BLOB data file I/O facility
• BLOB and BINARY data addition update and partial extraction facility

Organization of this section

6.8.1 Global buffers

6.8.2 Prefetch facility

6.8.3 Asynchronous READ facility

6.8.4 Deferred write processing

6.8.5 Facility for parallel writes in deferred write processing

6.8.6 Incorporation during commit

6.8.7 LRU management method for global buffers

6.8.8 Accessing pages using the snapshot method

6.8.9 Global buffer pre-writing

6.8.10 Local buffers

6.8.11 BLOB data file output facility

6.8.12 BLOB and BINARY data addition update and partial extraction facility

6.8.13 Locator facility