System Architecture 2-5
Structure of an Extent .................2-114
Extent Size....................2-114
Page Types ...................2-115
Next Extent Allocation .................2-117
Structure of a Dbspace Page ...............2-120
Page Header ...................2-121
Timestamp ...................2-121
Slot Table ....................2-121
Data Row Format and Rowid ..............2-123
Data Pages and Data Row Storage .............2-125
Single-Page Storage ................2-126
Multipage Storage .................2-127
Storage of Modiļ¬ed Rows ..............2-129
Page Compression .................2-133
Structure of an Index Page ...............2-133
The Root Node Page ................2-134
Leaf Node Pages .................2-136
Index Key Entries .................2-138
Branch Node Pages.................2-141
Structure of a Dbspace Bit-Map Page ............2-143
2-Bit Bit-Mapped Pages ...............2-143
4-Bit Bit-Mapped Pages ...............2-144
Blob Storage and the Blob Descriptor ............2-145
Structure of a Dbspace Blob Page .............2-146
Blobspace Page Types .................2-148
Blobspace Free-Map Page ..............2-148
Blobspace Bit-Map Page ...............2-148
Blobpage ....................2-149
Structure of a Blobspace Blobpage .............2-149
Physical Log......................2-152
Logical Log Files ....................2-154
Fast Recovery and Data Restore..............2-154
File Rotation ....................2-155
File Contents ....................2-156
Number and Size...................2-156
Blobspace Logging ..................2-158
Long Transactions ..................2-159