os: centos 7.4
Auto_explainlain is a feature added after postgresql 8.4 that provides a way to automatically record execution plans for slow statements without having to run EXPLAIN manually.
This is very important in the real world.
auto_explain is automatically installed using ma ...
Posted on Wed, 22 Jan 2020 11:16:53 -0500 by Alicia
DataStream data conversion
// order zhangsan TV,GAME
val env = StreamExecutionEnvironment.createLocalEnvironment()
val props = new Properties()
Posted on Sun, 19 Jan 2020 02:31:15 -0500 by Rayne
Spark is a lightning fast unified analysis engine (Computing Framework) for large-scale data set processing. Spark is doing batch computing of data, and its computing performance is about 10-100 times that of Hadoop MapReduce. Because spark uses advanced DAG based task scheduli ...
Posted on Sun, 19 Jan 2020 02:17:34 -0500 by varsha
This article records the whole process of CentOS 7 64 bit installation on the virtual machine, which I downloaded for my future installation and use
Download address: http://mirrors.aliyun.com/centos/7/isos/x86_64/ Download centos-7-x86_-dvd-1908.iso
Configure the network environment
For the next st ...
Posted on Sat, 18 Jan 2020 04:05:19 -0500 by hanji
What is mysql's master-slave replication?
MySQL master-slave replication refers to the replication of data from one MySQL database server master node to one or more slave nodes.MySQL replicates asynchronously by default, so that the master server is not always accessed by the slave node to update its own data, which can be updated over a remote ...
Posted on Wed, 15 Jan 2020 20:55:58 -0500 by Cinquecento
1, RPM package management tools
2, Install, upgrade, and uninstall RPM software
3, Linux Application Foundation
4, Source code compilation and installation
1, RPM package management tools
RPM Pachage Manager is proposed by Red Hat and adopted by many Linux distributions. Establish a unified database file, record the change in ...
Posted on Sun, 12 Jan 2020 22:11:04 -0500 by aznkidzx
Docker Cgroup Resource Configuration Method
Cgroup is a mechanism provided by the Linux kernel to limit, record, and isolate the physical resources used by process groups
Docker uses Cgroup to control the resource quotas used by containers, including cpu, memory, and disk. Docker basically covers common resource quotas and usage control
Posted on Thu, 09 Jan 2020 20:50:18 -0500 by brax23
First of all, we need to know what kind of identity is 32-bit and 64 bit.
PC server X86 series
I386--I686 are all 32 bits
X86 ʄ is 64 bit
Order is not too much, in order to prevent the obstacles of selectivity, choose the first method unanimously, the latter is only for supplement.
Posted on Wed, 08 Jan 2020 13:46:56 -0500 by mediamind
If you use CentOS for local yum source installation, use the image of centos-7-x86_-everything-1708.iso
Make the yum source, otherwise 32-bit dependency package will be missing
1. Create the directory / home/CentOS7u4 in the virtual machine, and copy the installation package of CentOS7u4 from the optical drive to the local ...
Posted on Tue, 07 Jan 2020 00:34:38 -0500 by raptorman
Last login: Thu Jul 13 15:28:02 2017 from 192.168.1.102
[root@minimal ~]# ps -ef |grep redis
redis 1015 1 0 16:09 ? 00:00:00 /usr/bin/redis-server 127.0.0.1:6379
root 2361 2343 0 16:10 pts/0 00:00:00 grep --color=auto redis
[root@minimal ~]# ps -ef |grep nginx
root 1039 1 0 16:09 ? 00: ...
Posted on Mon, 06 Jan 2020 16:08:08 -0500 by fatmcgav