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README

Final Project 321 BTree

This is the README for the BTree final group Project. These source files
represent a BTree that reads in a text file representing the human genome,
and allows the user to search the sequences for a given key.

Entry points

GeneBankCreateBTree.java :

Entry point to create the BTree based on a file given as
argument

GeneBankSearch.java :

Entry point to search nodes stored in BTree for given gene sequence.

Source files

GeneBankCreateBTree.java - entry point to make the BTree Data Structure
GeneBankSearch.java      - entry point to search the BTree nodes for a gene sequence.
BTree.java               - A node based representation of a BTree data structure
                           implemented with a RandomAccess file of arranged bytes.
BTreeNode.java           - Represents a single node in a BTree.
TreeObject.java          - Represents the keys inside of each BTree node.

File Byte Arrangements

BTree file Layout:

| int location of root | int degree | BTreeNode #1 | ... | BTreeNode #(n-1) | root | 

BTreeNode Layout:

| int nodeOffset | int numObject | Boolean leaf | TreeObject #1 | ... | TreeObject #(2*degree-1) | int childOffset #1 | ... | int childOffet #(2*degree) |

TreeObject Layout:

| long key | int frequency |

Observations

on onyx our program takes 1 minute to run test3.gbk to create and print out the BTree to a file. 
So far no cache has been implemented to speed up node searching

btree's People

Contributors

lucas-marchand avatar lammmnnn avatar tuannguy avatar

Watchers

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