B Tree Index Files Assignment Help And Online Tutoring
B Tree Index Files
The B-tree is data structure which retains information categorized as well as enables queries, sequential entry, insertions, as well as deletions within logarithmic amortized period. The actual B-tree is really a generalization of the binary search tree in that a node can have more than two children.
B - Tree Index Files:
Similar to B+-tree, however B-tree enables search-key values to look only one time, removes repetitive storage space associated with research keys.
Search keys within nonleaf nodes nowhere else in the B-tree; an additional pointer field for each search key in a nonleaf node must be included. Nonleaf node – pointers Bi is the bucket or file record pointers.
Benefits of B-Tree indices:
- Could use much less tree nodes than a corresponding B+-Tree.
- Occasionally feasible to locate search-key value prior reaching leaf node.
Drawbacks associated with of B-Tree indices:
- Just small percentage of search-key values are found early.
- Non-leaf nodes tend to be bigger, therefore fan-out is actually decreased. Thus B-Trees typically have greater depth than compared to related B+-Tree.
- Insertion and deletion more difficult compared to within B+-Trees.
- Implementation is harder than B+-Trees.
Fig: B-Plus Tree
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