Tag：vote
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Time：2021-1-12
If we can’t talk about love, we can feel sorry for ourselves. Wedge We talked about it in the last articleSpringSecurityI believe that after you have read it carefully, you will have a good understanding of itSpringSecurityThe authentication process has been understood for seven or eight points. This issue is a dynamic authentication chapter that […]
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Time：2021-1-3
Zookeeper is a distributed coordination service maintained by Apache. Zookeeper can be regarded as a highly available file system. Zookeeper can be used for publish / subscribe, load balancing, command service, distributed coordination / notification, cluster management, master election, distributed lock and distributed queue. 1、 About zookeeper 1.1 what is zookeeper Zookeeper is the top […]
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Time：2020-12-29
The contents of the database table provided by the CSV file are as follows: links.csv Format: movies.csv Format: a movie can have multiple genres, separated by | ratings.csv: Users score movies: tags.csv : movie tag Exercise 1: List the total number of records in the four tables: select ‘links’ as “table name”, count(1) as “row […]
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Time：2020-12-17
Through the first two articles, we can see that Nacos is powerful from the perspective of use. Our existing configuration support is more friendly and less intrusive to the project. This is also the motivation for me to continue to study him and see if it can be introduced into the project. The following three […]
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Time：2020-12-12
preface The 12th company of zookeeper, a big factory in the first line, asked, can you stand it? This article has been included in GitHub https://github.com/whx123/Jav… 1. Interviewer: have you ever used zookeeper in your work? Do you know what it is and what is its use? I of chicken Some of them have used […]
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Time：2020-12-7
Raft algorithm is divided into two stages Leader election Three roles Follower, candidate, leader (in order)The three roles cannot be overstepped, that is, leader can only degenerate to follower, follower can only be upgraded to candidate, candidate can be degenerated to follower, or elected as leader. How to convert it? Will term and timeout change […]
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Time：2020-11-15
introduction Judging from the recent BCH bifurcation process, the governance of pow type chains such as bitcoin has been completely monopolized by large-scale mine owners (ore bullies), and has become a arena for the power and profit of mining bullies, which has greatly damaged people’s belief in the decentralized transformation of blockchain. Although Ethereum has […]
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Time：2020-11-7
For developers, the cell programming model is undoubtedly the most interesting part of nervos CKB. Here, we give a brief description of the cell model Cell is a universal version of utxo A cell is a utxo containing arbitrary data and customizable scripts When a transaction attempts to destroy or create a cell, the script […]
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Time：2020-10-30
Swoole v4.5.6 has been released, and two special functions have been added at the bottom swoole_substr_json_decode swoole_substr_unserialize What’s the point? seeSwoole 4.5.6 supports zero copy JSON or PHP deserialization This article only describes the update log: New API newly addedswoole_substr_unserializeandswoole_substr_json_decode (#3762) (@matyhtf) enhance modifyCoroutineHttpServerOfonAcceptMethod is private (dfcc83b) (@ matyhtf) repair Fix the problem of coverage […]
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Time：2020-10-17
In this blog post, I want to share a powerful tool, leadership health check. This will help your management team become stronger and reveal improvement opportunities for active service-oriented leadership teams, thus better empowering the agile teams you support. First, let’s start from scratch. One of my favorite exercises in the agile coach’s toolbox is […]
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Time：2020-10-17
OK, what is hot and cold data exchange? To explain it, the cold data is the data used before, which has a sense of past tense, while the hot data is the current data. How to exchange? It is to store the data cycle of redis in MySQL! Overall business process After users vote, first […]
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Time：2020-10-11
The basic command is skipped. Please refer to the command details redis.io Official website or redis Chinese official website Redis profile: Redis is an open source (BSD licensed) in memory data structure storage system, which can be used as database, cache and message middleware. It supports many types of data structures, such as strings, hashes, […]
