what is hive. Data warehousing: Storing, querying, and analyzing large-scale datasql language: Easy-to-use class SQL query languageO Programming Model: Allows developers to customize UDFs, Transform, Mapper, and Reducer to make it easier to do work that complex mapreduce cannot doo data format: process data in any data format on Hadoop, or use an optimized format to store data on Hadoop, rcfile,orcfile,parquestData Services: HiveServer2, multiple APIs to access data on Hadoop, JDBC,ODBCThe meta
Vue2 source code browsing and Analysis 01, vue2 source code 01
1. constructor Vue $3
Function Vue $3 (options) {if ("development "! = 'Production '! (This instanceof Vue $3) {warn ('vue is a constructor and shoshould be called with the 'new' keyword ');}// Execute the initi
JDK source code analysis collection 01 overall framework, jdk source code 01 overall
A collection class is a tool class provided by java, mainly including List, Set, Map, and vector. All collection-related classes are located in java. util.
The overall framework of the Colle
Volley Library source code analysis, volley Library source codeZookeeper Volley uses the thread pool as the basic structure, mainly divided into the main thread, cache thread and network thread.The main thread and cache thread have only one thread, while the NetworkDispatcher thread can have multiple threads, which can
Android thread asynchronous communication mechanism source code analysis, android source code
This article first analyzes the message transmission mechanism between threads in Android from the overall architecture, and then introduces the functions and tasks of each componen
HMaster startup code analysis for source code analysis of HBase1.0.0 (1), hbase1.0.0hmaster
This article is not really about startup code parsing. This article mainly analyzes the startHMaster part from the startup process. This a
HMaster startup code analysis for source code analysis of HBase1.0.0 (2), hbase1.0.0hmaster
In the previous blog, my code analysis is the startup function of the startMaster core. This
JQuery-1.9.1 source code analysis series (15) animation processing, jquery-1.9.1 source code
First, you must have basic knowledge about queues. See the previous chapter.
A. Detailed description of the animation entry jQuery. fn. animate function Execution Process
Call jQu
phase was our target object replaced by an agent?On this issue, I think we should give our own answer, remember when we analyze the spring IoC source code, we say that we want to modify a bean basically only 2 stages, or 3 small segmentsThe first is in the implementation of the beanfactorypostprocessor phase, we have previously said that this stage is to modify the Beandefinition, modified beandefinition w
AsyncTask source code analysis, asynctask source codeFor the usage of AsyncTask, see the previous blog "AsyncTask resumable upload". This article only parses the source code of AsyncTask. AsyncTask.exe cute method:
1 public fi
Java Collection: HashMap source code analysis, hashmap source code1. HashMap Overview
HashMap is implemented based on the Map interface of the hash table. This implementation provides all optional ing operations and allows the use of null values and null keys. (Except for not synchronizing data and allowing null, The H
From the source code analysis java Collection [HashMap], the source code javahashmap
As we know, Map stores key-value pairs. Its basic unit is to implement Node
static class Node
You can see its function by looking at the definition. It stores an object next to the next no
AtomicInteger source code analysis, atomicinteger source code
Problem background
Recently, I 've seen the use of AtomicInteger to modify the count in the queue blockingqueue. I 've also seen some explanations of AtomicInteger, and I have learned a lot about its implemen
Original URL: Http://www.cnblogs.com/csdevNetworkcomms is a C # language written TCP/UDP communication framework The author of the British used to be charged for the price of £ 249 I used to spend more than 2000 to buy this communication framework,Currently the author has open source license: Apache License v2Open Source address is: Https://github.com/MarcFletcher/NetworkComms.NetThis framework gives me the
DBUtils source code analysis, dbutils source code
In fact, in this article, I only analyzed the operation process of dbutis query.
As for why the class should be designed in this way, the design patterns and other advanced knowledge points should be discussed in the next sec
[Nginx source code analysis] Main Function parsing, nginx source code
Ngx_strerror_init
The function stores the error information in the ngx_sys_errlist array and creates a ing array of errno-> errmsg. When an error occurs in the system, you can directly find errmsg through
Nginx smooth upgrade source code analysis, nginx source code
1. Smooth upgrade steps
1. Rename the original sbin/nginx file and put the new nginx file under the sbin/directory.
# Mv./sbin/nginx./sbin/nginx. old
# Cp ~ /Nginx./sbin/
2. Send the USR2 signal to the running ngin
BT source code learning experience (14th): client source code analysis (blocking Management in peer-to-peer connection) Author: Wolfenstein from our previous analysis we can see that when a peer-to-peer connection is established,
Source code analysis 4-send a message and source code
Reprinted please indicate the source:Http://blog.csdn.net/mxway/article/details/44569831 This article is based on the source code
String source code analysis, string source code
The String class maintains a char [] type value to store strings. The source code is relatively simpler.1. Immutable
The immutability of
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