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An Overview of the Optical Subsystem
In This Chapter
The Advantages of Optical Media
Optical Media and TEXT and BYTE Data
Components of the Optical-Storage Subsystem
Optical Platter Organization
Storage of TEXT and BYTE Data
Storing TEXT and BYTE Data Objects Sequentially
Storing TEXT and BYTE Data in a Cluster
Placing TEXT and BYTE Data in Optical Clusters
TEXT and BYTE Data Columns
The Cluster-Key Column
How Optical Clustering Occurs
Calculating Logical-Log Space for Optical Data
Support for Multiple Optical Virtual Processors
Determining the Number of Optical Virtual Processors
The Optical Subsystem API
The Memory Cache and Staging-Area Blobspace
Memory Cache
The Staging Area
The STAGEBLOB Parameter
The onstat -O Option
The API Internal Layer
Memory for the Optical Transfer Buffer
The API External Layer
The Optical Subsystem Message File
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