Hive3.1.2伪分布式安装

news2024/12/23 3:45:43

Hive3.1.2安装

前言

Hive是何物,自己去百度,在此不多bb,直接开整…

学习一个组件,个人觉得最重要的是先学会安装再说,巧妇难为无米之炊撒…

下载

下载地址:https://downloads.apache.org/hive/hive-3.1.2/apache-hive-3.1.2-bin.tar.gz

解压安装

前置条件

开整之前再多bb一句,hive是依托hdfs+MapReduce进行存储和计算的,务必要先安装好hadoop可以玩的喔。

安装hadoop可以参考链接:https://blog.csdn.net/MrZhangBaby/article/details/131683270?spm=1001.2014.3001.5502

安装
# 将下载好的tar包进行解压
tar  -xzvf apache-hive-3.1.2-bin.tar.gz -C /Users/zhangchenguang/software/

# 名字太长的话可以选择执行重命名操作
mv apache-hive-3.1.2-bin hive-3.1.2
参考官网

配置:https://cwiki.apache.org/confluence/display/Hive/GettingStarted#GettingStarted-InstallingHivefromaStableRelease

在这里插入图片描述

好像没怎么写配置,仅仅芝士配置了一下,个人感觉有点乱吧。

直接开整
# 参考hadoop把home先搞到环境变量里面 windows:/etc/profice
vi ~/.bash_profile

# 新增HIVE_HOME配置,便于使用命令hive等
# hive
export HIVE_HOME=/Users/zhangchenguang/software/hive-3.1.2
export PATH=$PATH:$HIVE_HOME/bin

# 调整配置文件
cp conf/hive-env.sh.template conf/hive-env.sh
cp conf/hive-default.xml.template conf/hive-site.xml

# 在hive-env.sh 加入HADOOP_HOME
export HADOOP_HOME=/Users/zhangchenguang/software/hadoop-3.2.4

# 至于hive-site.xml这个文件,暂时没有在官网发现需要调整哪里,暂不做修改。

# 然后执行hive
hive

然后出现第一个异常

异常一
(base) zhangchenguang@cgzhang.local:/Users/zhangchenguang/software/hive-3.1.2/conf $ hive
SLF4J: Class path contains multiple SLF4J bindings.
SLF4J: Found binding in [jar:file:/Users/zhangchenguang/software/hive-3.1.2/lib/log4j-slf4j-impl-2.10.0.jar!/org/slf4j/impl/StaticLoggerBinder.class]
SLF4J: Found binding in [jar:file:/Users/zhangchenguang/software/hadoop-3.2.4/share/hadoop/common/lib/slf4j-reload4j-1.7.35.jar!/org/slf4j/impl/StaticLoggerBinder.class]
SLF4J: See http://www.slf4j.org/codes.html#multiple_bindings for an explanation.
SLF4J: Actual binding is of type [org.apache.logging.slf4j.Log4jLoggerFactory]
Exception in thread "main" java.lang.NoSuchMethodError: com.google.common.base.Preconditions.checkArgument(ZLjava/lang/String;Ljava/lang/Object;)V
	at org.apache.hadoop.conf.Configuration.set(Configuration.java:1357)
	at org.apache.hadoop.conf.Configuration.set(Configuration.java:1338)
	at org.apache.hadoop.mapred.JobConf.setJar(JobConf.java:536)
	at org.apache.hadoop.mapred.JobConf.setJarByClass(JobConf.java:554)
	at org.apache.hadoop.mapred.JobConf.<init>(JobConf.java:448)
	at org.apache.hadoop.hive.conf.HiveConf.initialize(HiveConf.java:5141)
	at org.apache.hadoop.hive.conf.HiveConf.<init>(HiveConf.java:5099)
	at org.apache.hadoop.hive.common.LogUtils.initHiveLog4jCommon(LogUtils.java:97)
	at org.apache.hadoop.hive.common.LogUtils.initHiveLog4j(LogUtils.java:81)
	at org.apache.hadoop.hive.cli.CliDriver.run(CliDriver.java:699)
	at org.apache.hadoop.hive.cli.CliDriver.main(CliDriver.java:683)
	at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
	at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
	at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
	at java.lang.reflect.Method.invoke(Method.java:498)
	at org.apache.hadoop.util.RunJar.run(RunJar.java:323)
	at org.apache.hadoop.util.RunJar.main(RunJar.java:236)
解决方法

能咋解决嘞,看这个报错像是jar包冲突,百度一波。参考:https://blog.51cto.com/u_15316404/3216184

经过搜索确实是hadoop和hive的jar包冲突了,名字叫guava

在hadoop的目录为 hadoop/share/hadoop/common/lib下

在hive的目录为hive/lib

比较两个版本的jar包,将高版本的复制给另一个,然后低版本的删除,无非就是 mv、cp、rm(删除前最好养成备份的好习惯喔~),在此不多bb了。

继续hive执行出现异常二
Unable to instantiate org.apache.hadoop.hive.ql.metadata.SessionHiveMetaStoreClient

HiveMetaStore元数据,hive要有元数据呀??? 继续查呗,官网查到这样一段描述:

在这里插入图片描述

那就开始搞元数据,从官网获悉默认会以 derby 为元数据存储,先不着急换,先用着呗。开整,执行后出现了异常三

(base) zhangchenguang@cgzhang.local:/Users/zhangchenguang/software/hive-3.1.2 $ schematool -dbType derby -initSchema
SLF4J: Class path contains multiple SLF4J bindings.
SLF4J: Found binding in [jar:file:/Users/zhangchenguang/software/hive-3.1.2/lib/log4j-slf4j-impl-2.10.0.jar!/org/slf4j/impl/StaticLoggerBinder.class]
SLF4J: Found binding in [jar:file:/Users/zhangchenguang/software/hadoop-3.2.4/share/hadoop/common/lib/slf4j-reload4j-1.7.35.jar!/org/slf4j/impl/StaticLoggerBinder.class]
SLF4J: See http://www.slf4j.org/codes.html#multiple_bindings for an explanation.
SLF4J: Actual binding is of type [org.apache.logging.slf4j.Log4jLoggerFactory]
Exception in thread "main" java.lang.RuntimeException: com.ctc.wstx.exc.WstxParsingException: Illegal character entity: expansion character (code 0x8
 at [row,col,system-id]: [3215,96,"file:/Users/zhangchenguang/software/hive-3.1.2/conf/hive-site.xml"]
	at org.apache.hadoop.conf.Configuration.loadResource(Configuration.java:3040)
<?xml version="1.0" encoding="UTF-8" standalone="no"?>
<?xml-stylesheet type="text/xsl" href="configuration.xsl"?><!--
   Licensed to the Apache Software Foundation (ASF) under one or more
   contributor license agreements.  See the NOTICE file distributed with
   this work for additional information regarding copyright ownership.
   The ASF licenses this file to You under the Apache License, Version 2.0
   (the "License"); you may not use this file except in compliance with
   the License.  You may obtain a copy of the License at

       http://www.apache.org/licenses/LICENSE-2.0

   Unless required by applicable law or agreed to in writing, software
   distributed under the License is distributed on an "AS IS" BASIS,
   WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
   See the License for the specific language governing permissions and
   limitations under the License.
--><configuration>
  <!-- WARNING!!! This file is auto generated for documentation purposes ONLY! -->
  <!-- WARNING!!! Any changes you make to this file will be ignored by Hive.   -->
  <!-- WARNING!!! You must make your changes in hive-site.xml instead.         -->
  <!-- Hive Execution Parameters -->
  <property>
    <name>hive.exec.script.wrapper</name>
    <value/>
    <description/>
  </property>
  <property>
    <name>hive.exec.plan</name>
    <value/>
E486: Pattern not found: 3215
3203     <description>
	at org.apache.hadoop.conf.Configuration.loadResources(Configuration.java:2989)
	at org.apache.hadoop.conf.Configuration.loadProps(Configuration.java:2862)
	at org.apache.hadoop.conf.Configuration.addResourceObject(Configuration.java:1012)
	at org.apache.hadoop.conf.Configuration.addResource(Configuration.java:917)
	at org.apache.hadoop.hive.conf.HiveConf.initialize(HiveConf.java:5151)
	at org.apache.hadoop.hive.conf.HiveConf.<init>(HiveConf.java:5104)
	at org.apache.hive.beeline.HiveSchemaTool.<init>(HiveSchemaTool.java:96)
	at org.apache.hive.beeline.HiveSchemaTool.main(HiveSchemaTool.java:1473)
	at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
	at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
	at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
	at java.lang.reflect.Method.invoke(Method.java:498)
	at org.apache.hadoop.util.RunJar.run(RunJar.java:323)
	at org.apache.hadoop.util.RunJar.main(RunJar.java:236)
Caused by: com.ctc.wstx.exc.WstxParsingException: Illegal character entity: expansion character (code 0x8
 at [row,col,system-id]: [3215,96,"file:/Users/zhangchenguang/software/hive-3.1.2/conf/hive-site.xml"]
	at com.ctc.wstx.sr.StreamScanner.constructWfcException(StreamScanner.java:634)
	at com.ctc.wstx.sr.StreamScanner.throwParseError(StreamScanner.java:504)
	at com.ctc.wstx.sr.StreamScanner.reportIllegalChar(StreamScanner.java:2469)
	at com.ctc.wstx.sr.StreamScanner.validateChar(StreamScanner.java:2416)
	at com.ctc.wstx.sr.StreamScanner.resolveCharEnt(StreamScanner.java:2382)
	at com.ctc.wstx.sr.StreamScanner.fullyResolveEntity(StreamScanner.java:1528)
	at com.ctc.wstx.sr.BasicStreamReader.nextFromTree(BasicStreamReader.java:2818)
	at com.ctc.wstx.sr.BasicStreamReader.next(BasicStreamReader.java:1121)
	at org.apache.hadoop.conf.Configuration$Parser.parseNext(Configuration.java:3336)
	at org.apache.hadoop.conf.Configuration$Parser.parse(Configuration.java:3130)
	at org.apache.hadoop.conf.Configuration.loadResource(Configuration.java:3023)
	... 14 more
解决方法

原因:hive-site.xml配置文件中存在 &#8 特殊字符

解决:干掉 &#8 特殊字符

Exception in thread “main” java.lang.RuntimeException: com.ctc.wstx.exc.WstxParsingException: Illegal character entity: expansion character (code 0x8
at [row,col,system-id]: [3215,96,“file:/Users/zhangchenguang/software/hive-3.1.2/conf/hive-site.xml”]

位置信息在日志中已经说明了 ,删除即可。

再继续,初始化成功
(base) zhangchenguang@cgzhang.local:/Users/zhangchenguang/software/hive-3.1.2 $ schematool -dbType derby -initSchema
SLF4J: Class path contains multiple SLF4J bindings.
SLF4J: Found binding in [jar:file:/Users/zhangchenguang/software/hive-3.1.2/lib/log4j-slf4j-impl-2.10.0.jar!/org/slf4j/impl/StaticLoggerBinder.class]
SLF4J: Found binding in [jar:file:/Users/zhangchenguang/software/hadoop-3.2.4/share/hadoop/common/lib/slf4j-reload4j-1.7.35.jar!/org/slf4j/impl/StaticLoggerBinder.class]
SLF4J: See http://www.slf4j.org/codes.html#multiple_bindings for an explanation.
SLF4J: Actual binding is of type [org.apache.logging.slf4j.Log4jLoggerFactory]
Metastore connection URL:	 jdbc:derby:;databaseName=metastore_db;create=true
Metastore Connection Driver :	 org.apache.derby.jdbc.EmbeddedDriver
Metastore connection User:	 APP
Starting metastore schema initialization to 3.1.0
Initialization script hive-schema-3.1.0.derby.sql
.
.
.
.
.
.
Initialization script completed
schemaTool completed
继续执行Hive
出现了异常四
(base) zhangchenguang@cgzhang.local:/Users/zhangchenguang/software/hive-3.1.2 $ hive
SLF4J: Class path contains multiple SLF4J bindings.
SLF4J: Found binding in [jar:file:/Users/zhangchenguang/software/hive-3.1.2/lib/log4j-slf4j-impl-2.10.0.jar!/org/slf4j/impl/StaticLoggerBinder.class]
SLF4J: Found binding in [jar:file:/Users/zhangchenguang/software/hadoop-3.2.4/share/hadoop/common/lib/slf4j-reload4j-1.7.35.jar!/org/slf4j/impl/StaticLoggerBinder.class]
SLF4J: See http://www.slf4j.org/codes.html#multiple_bindings for an explanation.
SLF4J: Actual binding is of type [org.apache.logging.slf4j.Log4jLoggerFactory]
Hive Session ID = d5a22c3b-992d-44fe-bef1-35932439f12a

Logging initialized using configuration in jar:file:/Users/zhangchenguang/software/hive-3.1.2/lib/hive-common-3.1.2.jar!/hive-log4j2.properties Async: true
Exception in thread "main" java.lang.IllegalArgumentException: java.net.URISyntaxException: Relative path in absolute URI: ${system:java.io.tmpdir%7D/$%7Bsystem:user.name%7D
	at org.apache.hadoop.fs.Path.initialize(Path.java:263)
	at org.apache.hadoop.fs.Path.<init>(Path.java:221)
	at org.apache.hadoop.hive.ql.session.SessionState.createSessionDirs(SessionState.java:710)
	at org.apache.hadoop.hive.ql.session.SessionState.start(SessionState.java:627)
	at org.apache.hadoop.hive.ql.session.SessionState.beginStart(SessionState.java:591)
	at org.apache.hadoop.hive.cli.CliDriver.run(CliDriver.java:747)
	at org.apache.hadoop.hive.cli.CliDriver.main(CliDriver.java:683)
	at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
	at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
	at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
	at java.lang.reflect.Method.invoke(Method.java:498)
	at org.apache.hadoop.util.RunJar.run(RunJar.java:323)
	at org.apache.hadoop.util.RunJar.main(RunJar.java:236)
Caused by: java.net.URISyntaxException: Relative path in absolute URI: ${system:java.io.tmpdir%7D/$%7Bsystem:user.name%7D
	at java.net.URI.checkPath(URI.java:1823)
	at java.net.URI.<init>(URI.java:745)
	at org.apache.hadoop.fs.Path.initialize(Path.java:260)
	... 12 more
如何解决?

按着提示 ”${system:java.io.tmpdir“ 检索发现出现了很多个地方,一个一个试着改呗。

经过验证调整如下

  <property>
    <name>hive.server2.logging.operation.log.location</name>
    <value>${system:java.io.tmpdir}/${system:user.name}/operation_logs</value>
    <description>Top level directory where operation logs are stored if logging functionality is enabled</description>
  </property>
.
.
.
  <property>
    <name>hive.querylog.location</name>
    <value>${system:java.io.tmpdir}/${system:user.name}</value>
    <description>Location of Hive run time structured log file</description>
  </property>
.
.
.
  <property>
    <name>hive.exec.local.scratchdir</name>
    <value>${system:java.io.tmpdir}/${system:user.name}</value>
    <description>Local scratch space for Hive jobs</description>
  </property>
.
.
.
  <property>
    <name>hive.downloaded.resources.dir</name>
    <value>${system:java.io.tmpdir}/${hive.session.id}_resources</value>
    <description>Temporary local directory for added resources in the remote file system.</description>
  </property>
<property>
    <name>hive.server2.logging.operation.log.location</name>
    <value>/Users/zhangchenguang/software/hive-3.1.2/hive_tmp/operation_logs</value>
    <description>Top level directory where operation logs are stored if logging functionality is enabled</description>
  </property>
.
.
.
  <property>
    <name>hive.querylog.location</name>
    <value>/Users/zhangchenguang/software/hive-3.1.2/hive_tmp/</value>
    <description>Location of Hive run time structured log file</description>
  </property>
.
.
.
  <property>
    <name>hive.exec.local.scratchdir</name>
    <value>/Users/zhangchenguang/software/hive-3.1.2/hive_tmp</value>
    <description>Local scratch space for Hive jobs</description>
  </property>
.
.
.
  <property>
    <name>hive.downloaded.resources.dir</name>
    <value>/Users/zhangchenguang/software/hive-3.1.2/hive_tmp/${hive.session.id}_resources</value>
    <description>Temporary local directory for added resources in the remote file system.</description>
  </property>
再执行hive

发现已经能进入了
在这里插入图片描述

📢注意:前提是一定要提前安装好hadoop喔

验证测试

建库、建表、写数据、查询

show databases;
create database test20230713;
use test20230713;
create table test_1(name string);

insert into test_1 select "hello,hive!";
select * from test_1;

结果如下

hive> show databases;
OK
default
Time taken: 0.035 seconds, Fetched: 1 row(s)
hive> create database test20230713;
OK
Time taken: 0.097 seconds
hive> use test20230713;
OK
Time taken: 0.019 seconds
hive> create table test_1(name string);
OK
Time taken: 0.428 seconds
hive> insert into test_1 select "hello,hive!";
Query ID = zhangchenguang_20230713183204_881b9cda-9aca-402f-a922-70891bc7be11
Total jobs = 3
Launching Job 1 out of 3
Number of reduce tasks determined at compile time: 1
In order to change the average load for a reducer (in bytes):
  set hive.exec.reducers.bytes.per.reducer=<number>
In order to limit the maximum number of reducers:
  set hive.exec.reducers.max=<number>
In order to set a constant number of reducers:
  set mapreduce.job.reduces=<number>
Starting Job = job_1689240208463_0002, Tracking URL = http://localhost:8088/proxy/application_1689240208463_0002/
Kill Command = /Users/zhangchenguang/software/hadoop-3.2.4/bin/mapred job  -kill job_1689240208463_0002
Hadoop job information for Stage-1: number of mappers: 1; number of reducers: 1
2023-07-13 18:32:13,681 Stage-1 map = 0%,  reduce = 0%
2023-07-13 18:32:18,889 Stage-1 map = 100%,  reduce = 0%
2023-07-13 18:32:23,027 Stage-1 map = 100%,  reduce = 100%
Ended Job = job_1689240208463_0002
Stage-4 is selected by condition resolver.
Stage-3 is filtered out by condition resolver.
Stage-5 is filtered out by condition resolver.
Moving data to directory hdfs://cgzhang.local:9000/user/hive/warehouse/test20230713.db/test_1/.hive-staging_hive_2023-07-13_18-32-04_250_407082641911746305-1/-ext-10000
Loading data to table test20230713.test_1
MapReduce Jobs Launched:
Stage-Stage-1: Map: 1  Reduce: 1   HDFS Read: 12393 HDFS Write: 222 SUCCESS
Total MapReduce CPU Time Spent: 0 msec
OK
Time taken: 20.266 seconds
hive> select * from test_1;
OK
hello,hive!
Time taken: 0.127 seconds, Fetched: 1 row(s)

本文来自互联网用户投稿,该文观点仅代表作者本人,不代表本站立场。本站仅提供信息存储空间服务,不拥有所有权,不承担相关法律责任。如若转载,请注明出处:http://www.coloradmin.cn/o/751465.html

如若内容造成侵权/违法违规/事实不符,请联系多彩编程网进行投诉反馈,一经查实,立即删除!

相关文章

Python探索金融数据进行时间序列分析和预测

大家好&#xff0c;时间序列分析是一种基于历史数据和趋势分析进行预测的统计技术。它在金融和经济领域非常普遍&#xff0c;因为它可以准确预测趋势并做出明智的决策。本文将使用Python来探索经济和金融数据&#xff0c;执行统计分析&#xff0c;并创建时间序列预测。 我们将…

面试题更新之-CSS Hack是什么?ie6,7,8的hack分别是什么?

文章目录 导文CSS Hack的定义广泛应用的CSS Hack技巧ie6,7,8的hack分别是什么&#xff1f; 导文 面试题更新之-CSS Hack是什么?ie6,7,8的hack分别是什么&#xff1f; CSS Hack的定义 CSS Hack指的是在CSS中使用一些特定的代码或技巧&#xff0c;通过利用不同浏览器对CSS实现的…

大学生用一周时间给麦当劳做了个App(安卓版)

背景 有个大学生粉丝最近私信联系我&#xff0c;说基于我之前开源的多语言项目做了个仿麦当劳的项目&#xff0c;虽然只是个样子货&#xff0c;但是收获颇多&#xff0c;希望把自己写的代码开源出来供大家一起学习进度。这个小伙伴确实是非常积极上进&#xff0c;很多大学生&a…

Grid++Report 6.8.6 Crack

GridReport报表开发工具总体介绍 报表开发工具概述 GridReport是一款同时支持C/S软件(桌面程序)与B/S软件(WEB程序)开发的报表工具&#xff0c;功能全面易学易用。C/S开发适用于VB.NET、C#、VB、VC、Delphi、CBuilder、QT与易语言等。B/S开发适用于ASP.NET(C# & VB.NET),…

蒲公英打包环境搭建碰到问题

一&#xff1a;证书那边选择手动&#xff0c;不要自动&#xff0c;——》debug配置dev证书&#xff0c;release配置ad-hoc证书 二&#xff1a;证书有时候不生效&#xff0c;删除重新下载。~/Library/MobileDevice/Provisioning Profiles 三&#xff1a;更新测试手机时&#…

数字化孪生技术在工业上的应用场景和案例分享

编者按&#xff1a;数字化孪生是一个完整的生命周期概念&#xff0c;它从设计和制造开始&#xff0c;贯穿整个生产过程&#xff0c;直到产品退役。数字化孪生将现实世界和虚拟世界相结合&#xff0c;使企业能够更好地理解和优化物理系统的运行情况&#xff0c;从而提高生产效率…

Java多线程下的单例模式参考

Java多线程下的单例模式参考 单例有多种的写法&#xff0c;本例是懒汉式单例的一种写法。在高并发环境下需要注意的是&#xff1a; 1.单例在并发访问并调用其相应的getInstance方法的时候也会造成创建多个实例对象&#xff0c;加锁是必要的。 2.使用synchronized是比较好的解…

基于预测控制模型的自适应巡航控制仿真与机器人实现(Matlab代码实现)

目录 &#x1f4a5;1 概述 &#x1f4da;2 运行结果 &#x1f389;3 参考文献 &#x1f468;‍&#x1f4bb;4 Matlab代码 &#x1f4a5;1 概述 自适应巡航控制技术为目前由于汽车保有量不断增长而带来的行车安全、驾驶舒适性及交通拥堵等问题提供了一条有效的解决途径&am…

JS、Vue鼠标拖拽

JS代码&#xff1a; <!DOCTYPE html> <html lang"en"> <head><meta charset"UTF-8"><meta http-equiv"X-UA-Compatible" content"IEedge"><meta name"viewport" content"widthdevic…

Python Web框架 Flask 安装、使用

Python Web框架 Flask 安装 安装 Flask 框架 首先需要安装 Flask 框架, 可以通过以下命令安装: [rootlocalhost web]# pip3 install Flask Collecting FlaskDownloading Flask-2.0.3-py3-none-any.whl (95 kB)|██████████████████████████████…

七大排序算法——归并排序,通俗易懂的思路讲解与图解(完整Java代码)

文章目录 一、排序的概念排序的概念排序的稳定性七大排序算法 二、归并排序核心思想代码实现 三、性能分析四、七大排序算法性能对比 一、排序的概念 排序的概念 排序&#xff1a;所谓排序&#xff0c;就是使一串记录&#xff0c;按照其中的某个或某些关键字的大小&#xff0…

基于Java的考研教室在线预约系统/基于springboot的考研教室在线预约系统

摘 要 网络的广泛应用给生活带来了十分的便利。所以把考研教室在线预约与现在网络相结合&#xff0c;利用java语言建设考研教室在线预约系统&#xff0c;实现考研教室在线预约的信息化。则对于进一步提高考研教室在线预约发展&#xff0c;丰富考研教室在线预约能起到不少的促进…

Spark编程-RDD

RDD创建方式 第一种&#xff1a; 读取外部数据集。例如&#xff1a;从本地文件加载数据集&#xff0c;或者从HDFS文件系统、HBase等外部数据源中加载数据集。 Spark可以支持文本文件、SequenceFile文件&#xff08;Hadoop提供的 SequenceFile是一个由二进制序列化过的key/valu…

MySQL的数据备份与还原--练习题

MySQLdump MySQLdump是MySQL提供的一个非常有用的数据库备份工具。MySQLdump命令执行时&#xff0c;可以将数据库备份成一个文本文件&#xff0c;该文件中实际上包含了多个CREATE 和 INSERT语句&#xff0c;使用这些语句可以重新创建表和插入数据。 看题&#xff1a; 第一题&a…

开源共建,360推出WatchAD2.0域安全威胁感知系统新版本

不论是在攻防演练还是真实入侵对抗场景中&#xff0c;攻击者往往通过攻击域控获取特权管理权限进而横向控制企业内网&#xff0c;窃取重要资产和数据&#xff0c;凭借独特的管理优势&#xff0c;AD域被广泛应用于大型企业的IT基础设施的集中管理。 然而&#xff0c;传统的网络…

【手撕C语言基础】结构体(2)

(꒪ꇴ꒪(꒪ꇴ꒪ ),hello我是祐言博客主页&#xff1a;C语言基础,Linux基础,软件配置领域博主&#x1f30d;快上&#x1f698;&#xff0c;一起学习&#xff01;送给读者的一句鸡汤&#x1f914;&#xff1a;集中起来的意志可以击穿顽石!作者水平很有限&#xff0c;如果发现错误…

微服务-Nacos环境安装

文章目录 1. 微服务1.1 微服务概括 2. 微服务框架2.1 Spring Cloud2.2 Spring Cloud alibaba/Spring Cloud Netflix2.3微服务框架组件(alibaba) 3 Nacos3.1 Nacos介绍3.3 Naocs工作结构3.3 Nacos功能3.4 环境准备下载安装 1. 微服务 1.1 微服务概括 单体架构有问题,所以做项目…

【uniapp开发小程序】设置开屏广告,广告图片全屏、覆盖自带胶囊导航

效果图&#xff1a; 点击跳转其他小程序&#xff1a; uni.navigateToMiniProgram() 官方文档&#xff1a;uni.navigateToMiniProgram(OBJECT) | uni-app官网 // 示例代码 uni.navigateToMiniProgram({appId: ,path: pages/index/index?id123,extraData: {data1: test},succes…

最新AI换脸替换工具离线版,一张图实现视频或者图片换脸

最新AI换脸替换工具离线版&#xff0c;一张图实现视频或者图片换脸 AI换脸替换工具离线版 基于开源项目&#xff0c;做了如下的小工具&#xff0c;给定一张人脸图&#xff0c;即可实现将某视频或者图片的人脸替换成给定的人脸。 软件操作依然很简单&#xff0c;鼠标悬停问号都…

七大排序算法——冒泡排序,通俗易懂的思路讲解与图解(完整Java代码)

文章目录 一、排序的概念排序的概念排序的稳定性七大排序算法 二、冒泡排序核心思想代码实现 三、性能分析四、七大排序算法 一、排序的概念 排序的概念 排序&#xff1a;所谓排序&#xff0c;就是使一串记录&#xff0c;按照其中的某个或某些关键字的大小&#xff0c;递增或…