The following hash algorithm summary from this week's weekly report, originally did not intend to post, but, considering that these resources are concerned about the use of hashing algorithms for large-scale image search crossing should be very
Memcached distributed algorithm-consistent hashing
Preface:
We know that data should be stored on M servers. The simplest way is to take the remainder (hash_value % m) and put it on the corresponding server, that is, when a server is added or
Local sensitive HashReprint Please specify http://blog.csdn.net/stdcoutzyx/article/details/44456679In the search technology, the index has always needed to study the core technology. Today, indexing technology is divided into three main categories:
Statement: This article is for learning data structure and Algorithm analysis (third edition) Clifford A.shaffer of the study notes, the Code has reference to the book's sample code. Hashing Method
Map key values to locations in the array to access
Find--understanding hashing algorithms and implementing hash tables
We like to use arrays for data lookup, because the array is a "random access" data structure, we can directly calculate the storage location of each array element based on the
The origin and introduction of the consistent hashing algorithm it's not going to be said, this is typically used for distributed caching, for handling cached data and for the correspondence between multiple cache servers.The personal understanding
We like to use arrays for data lookup, because the array is a "random access" data structure, we can directly calculate the storage location of each array element based on the starting address and the subscript values of the arrays, so its lookup
Search algorithm Category:Sequential table and Linear table method direct access method (hash list) tree indexing method based on key code value
Sequential Retrieval
(Key values are sorted by size)The most basic search algorithm, but the large
Objective:
For the SHA Safe hashing algorithm, before how to use, just stay in the heard of the stage, today in the picture Caching framework Glide source code found that its cache key is not MD5 encryption algorithm, but SHA-256 encryption
A brief description of the hash and the link address methodMethods for resolving hash conflicts:1. Linear detection methodIf we can predict the number of elements that will be deposited into the table, and we have enough memory space to accommodate
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