{[ promptMessage ]}

Bookmark it

{[ promptMessage ]}

root 13 2 3 5 7 14 16 17 24 19 20 22 30 24

Info icon This preview shows page 1. Sign up to view the full content.

View Full Document Right Arrow Icon
This is the end of the preview. Sign up to access the rest of the document.

Unformatted text preview: ancy (except for root). Each node contains d <= m <= 2d entries. The parameter d is called the order of the tree. •  Supports both equality and range ­searches efficiently. Index Entries (Direct search) Data Entries ("Sequence set") Example B+ Tree •  Search begins at root, and key comparisons direct it to a leaf •  Search for 5*, 15*, all data entries >= 24* ... Root 13 2* 3* 5* 7* 14* 16* 17 24 19* 20* 22* 30 24* 27* 29*   Based on the search for 15*, we know it is not in the tree! 33* 34* 38* 39* B+ Trees in Prac6ce •  Typical order: 100. Typical fill ­factor: 67%. –  average fanout = 133 •  Typical capaci6es: –  –  Height 4: 1334 = 312,900,700 records Height 3: 1333 = 2,352,637 records •  Can oVen hold top levels in buffer pool: –  –  –  Level 1 = 1 page = 8 Kbytes Level 2 = 133 pages...
View Full Document

{[ snackBarMessage ]}

What students are saying

  • Left Quote Icon

    As a current student on this bumpy collegiate pathway, I stumbled upon Course Hero, where I can find study resources for nearly all my courses, get online help from tutors 24/7, and even share my old projects, papers, and lecture notes with other students.

    Student Picture

    Kiran Temple University Fox School of Business ‘17, Course Hero Intern

  • Left Quote Icon

    I cannot even describe how much Course Hero helped me this summer. It’s truly become something I can always rely on and help me. In the end, I was not only able to survive summer classes, but I was able to thrive thanks to Course Hero.

    Student Picture

    Dana University of Pennsylvania ‘17, Course Hero Intern

  • Left Quote Icon

    The ability to access any university’s resources through Course Hero proved invaluable in my case. I was behind on Tulane coursework and actually used UCLA’s materials to help me move forward and get everything together on time.

    Student Picture

    Jill Tulane University ‘16, Course Hero Intern