转自: 土法炼钢:怎么实现一个简单的B+Tree In-Disk1. 写在前面说起B+树,大家应该都很熟悉。B+树是一种平衡的多路搜索树,广泛在操作系统和数据库系统用作索引。相比于内存的存取速度,磁盘I/O存取的开销要高上…
This is implementation of Bayer Trees, sometime referred to as Balanced Tree and normally used for indices of data bases. These routines provide all stuff that is needed to create and destroy; insert, update and delete; load and destroy; search and traverse; check a tree.Sort huge amounts ...
B-tree implementation in C. Contribute to Grabber/btree.c development by creating an account on GitHub.
Using a performance test code similar withtest/perftest.cpp, that inserts/retrieves/erases 1 millionstd::int64_tin random order, I see the following results in my machine (gcc 11.2, -O3, 200 times repeated per each target), compared tostd::setand Google's B-Tree implementation(https://...
first it is checked whether the node has some free space in it, and if so, the new key is just inserted in the node. However, if the node is full (it has m − 1 keys, where m is the order of the tree as maximum number of pointers to subtrees from one node), it needs to...
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B+树中的 tree oage 数据均存放在 page 的 data 成员中。 B_PLUS_TREE_PAGE b_plus_tree_page是另外两个 page 的父类,即 B+树中 tree page 的抽象。 IndexPageTypepage_type_;// leaf or internal. 4 Bytelsn_tlsn_// temporarily unused. 4 Byteintsize_;// tree page data size(not in byte...
(record id = page id combined with slot id,* see include/common/rid.h for detailed implementation) together within leaf* page. Only support unique key.*/INDEX_TEMPLATE_ARGUMENTSclassBPlusTreeLeafPage:publicBPlusTreePage {public:voidInit(page_id_tpage_id,page_id_tparent_id = INVALID_PAGE_ID...
Hence the B+-tree, in which each node stores up to d references to children and up to d − 1 keys. Each reference is considered “between” two of the node's keys; it references the root of a subtree for which all values are between these two keys....
In Proc. the 6th International Conference on Information Processing in Sensor Networks (IPSN 2007), New York, USA, 2007, pp.410-419. Wu C, Kuo T, Chang L P. An efficient b-tree layer implementation for flash-memory storage systems. Trans. Embedded Computing Sys., 2007, 6(3): 19. ...