Programmer Think

        Redis supports a variety of data structures, such as string, list, set, ordered set and hash. This time I sorted out about   Hash   Related commands, that is, about   Hashes   The related commands are as follows.         The part in the red circle in the figure above is ...

catalogue 1, Introduction to ELK log analysis system 1. Advantages and disadvantages of log server 2. What is ELK? 2.1 Logstash management includes four tools 2.2 log processing steps   2, Basic core concepts of Elasticsearch 3, Logstash introduction 4, Introduction to Kibana 5, Configure ELK log analysis system 1. Install elasti ...

About hash tablesConcept of hash tableHash table, also known as hash table, is a data structure that directly accesses the memory storage location according to the key. Hash tables exist in many high-level languages. For example, in Python, there is a data structure called dict. The Chinese translation is a dictionary, which should be implemen ...

Redis has five basic data structures: 1. String (string) 2. List 3. Hash (Dictionary) 4. Set 5. Zset (ordered set) There are eight categories of data structures: 1. Array 2. Stack 3. Queue 4. Linked list 5. Tree 6. Hash table 7. Pile 8. Figure Java has eight basic data types (it doesn't matter, but by the way 😜)， They are: 1. Byte (bit) 2. ...

1, Configure ELK log analysis system 1. Topology Configure and install ELK log analysis system, install cluster mode, two elasticsearch nodes, and monitor tomcat server logs hostoperating systemIP addressMain softwareNode1Centos7.4192. 168.8.15Elasticsearch,KibanaNode2Centos7.4192.168.8.16ElasticsearchapacheCentos7.4192.168.8.17Logst ...

BOM (browser object model) All browsers support window Object that represents the browser window. All js Global objects, functions, and variables automatically become window Object. The global variable is window Object. The global function is window Object. be based on html dom of document Also window One of the properties of the object. wi ...

Introduction to redis 1. Redis is an open source (BSD license) memory data structure store used as a database, cache, and message agent. 2. It supports data structures such as strings, hashes, lists, collections, sorted sets with range queries, bitmaps, superlogs, and geospatial indexes with radius queries. 3. Redis has built-in replication, L ...

Introduction to Redis database As a mature data storage middleware, Redis provides perfect data management functions, such as data expiration mentioned earlier and the data evict strategy we want to talk about today. Data locality principle The principle of locality, which runs through computer science, can clearly tell you that there are tw ...

1, String data type Overview: string is the most basic type of redis. It can store up to 512MB of data. String type is binary secure, that is, it can store any data, such as numbers, pictures, serialized objects, etc 1, SET/GET/APPEND/ STRLEN redis-cli redis 127.0.0.1:6379> exists mykey #Judge whether the key exists, retu ...

Redis data structure catalogueRedis data structureRedis multi databaseRedis basic operation commandsRedis general operation commandRedis core objectRedis database supports five data types:StringsHash (hash)List (string list)Set (string set)ZSet (ordered string set) Redis multi database Redis server has 16 databases (0 ~ 15). Database 0 is us ...