The actual case of increasing the backup speed of RMAN by 6 times

Article directory Database status Modify the kernel parameters shmmax and shmall of linux Share memory before modifying linux kernel parameters before modification Shared memory after modification linux kernel parameters after modification before and after comparison Change to asynchronous IO Chang ...

Posted on Wed, 26 Feb 2020 22:38:51 -0800 by jennatar77

Detailed explanation of signaling communication between NodeJs and C + + and pipeline communication under Linux

Catalog   Preface Anonymous pipeline interprocess communication Creation and illustration of inter process pipeline Pipe creation in MediaSoup Creating mediasound channel The process of communication between NodeJs and C + + pipeline MediaSoup message confirmation and event notification Summ ...

Posted on Tue, 25 Feb 2020 23:53:30 -0800 by Leesa

Taobao double 11 big data analysis (data preparation)

Article directory Preface Data content analysis `User? Log.csv ` file content meaning `Content meaning of "train.csv" and "test.csv" Upload the data to Linux system and decompress it Data set preprocessing File information interception Import data into Hive Confirm that the Had ...

Posted on Tue, 25 Feb 2020 23:24:24 -0800 by jara06

Multi stage and multi-stage construction in dockerfile

In the process of software development with container technology, it is time-consuming and laborious to control the size of container image. If the image we build is not only the environment of compiling software, but also the final running environment of software, it is difficult to control the imag ...

Posted on Tue, 25 Feb 2020 22:22:32 -0800 by Nicksta

Design pattern Overview - structural pattern

Last article "Design pattern Overview - creation pattern" After sorting out the five types of creation mode, let's go on to sort out the structural mode. The purpose of a structural pattern is to describe how classes or objects can be combined to form a larger structure. The class structur ...

Posted on Tue, 25 Feb 2020 05:05:05 -0800 by kashmirekat

Operation of lvm logical volume -- learning notes

This experiment environment is RedHat 7.0 system Logical volume manager is a mechanism used by linux system to manage hard disk partition. The original intention is to solve the problem that hard disk device is not easy to modify partition size after creating partition. It provides an abstract volume group, which can combine multiple hard disk ...

Posted on Tue, 25 Feb 2020 03:34:33 -0800 by Zyxist

Operating system principle experiment

Write at the beginning Recently, the new type of coronary pneumonia is very serious, and the school can't open any more. When learning the operating system principle on MOOC See the experiment questions left by the teacher, which are all completed by self-consciousness. Record them here. ...

Posted on Tue, 25 Feb 2020 03:02:08 -0800 by phorman

Comb the code related to adb server on the host side

Preface Preceding text Overview of ADB (I)ADB(2) ﹣ adbd ﹣ main() function code sortingADB(3) ﹣ adbd ﹣ adbd ﹣ main() function code sortingCode sorting of the host side of ADB (IV) In the previous article, we have simply combed the running code of the ADB on the host side. One article certainly c ...

Posted on Tue, 25 Feb 2020 00:56:04 -0800 by lur

Homework of python course selection system

#Course selection system#Role: school, student, course, lecturerRequest:#1. Establish two schools in Beijing and Shanghai#2. Create three courses: Linux, Python and go. linux\py opens in Beijing and go opens in Shanghai#3. Courses include, cycle, price, and create courses through schools#4. Create a class through the school, and the class is as ...

Posted on Mon, 24 Feb 2020 03:43:39 -0800 by xudzh

Mail service configuration (virtual domain & virtual user)

Mail service configuration (virtual domain & virtual user) First of all: https://www.somata.work/2019/VirtualMailServerConfig_MariaDB.html Now what I'm doing is:Linux + httpd + php + mariadb + postfix + dovecot + phpMyAdmin + postfixadmin + roundcubemail Here I will show you how to make a mail service based on virtual domain and virtual us ...

Posted on Sat, 22 Feb 2020 09:56:35 -0800 by JoeF