Chapter 12 Linux startup and kernel management -- CentOS startup management
Chapter 12 Linux startup and kernel management
Content overview
Startup process for versions prior to CentOS 6Service managementGrub managementStart troubleshootingKernel managementLaunch process of CentOS version 7 and laterUnit introductionService management and viewingStart troubleshootingCrack root passwordRepair Grub2
1.CentOS 6 startup ...
Posted by ebbatten on Mon, 22 Nov 2021 08:19:26 -0800
Basic management index
Reference: https://eco.dameng.com
Guidelines for managing indexes
Index: provides a faster path to access table data
DM8 common types
typedescribeClustered indexEach ordinary table has and has only one clustered indexunique indexThe index data is unique according to the index keyFunctional indexContains the precomputed value of the ...
Posted by chrislead on Mon, 22 Nov 2021 00:12:53 -0800
Zookeeper 3.6.x ultimate operation and maintenance
At first, I refused to operate Zookeeper. I haven't done this thing, but I've always known about it, and I've never used it; Well, after reading the official website documents and trying for a period of time, I can only say "that's it ~".
This article does not involve too much other people's blog knowledge, just look at it zk officia ...
Posted by Colton.Wagner on Sun, 21 Nov 2021 23:52:09 -0800
The 12th class of Guji class Redis distributed lock
The 12th class of Guji class Redis distributed lock
Introduction to distributed locks
Within the same JVM, we often use synchronized or Lock to solve the security problem between multiple threads. However, in the distributed architecture, between JVMs, a better locking mechanism is needed to deal with the thread security problem between cross ...
Posted by Megahertza on Sun, 21 Nov 2021 20:23:28 -0800
VFP can also be used as a front-end, cats and cats have gone through countless detours to summarize this entry to BS
Debug Server Usage
Open Framework Project File Run Environment Settings.prg Run the debug server to start. Default port is 801, IP is the IP of the development machine
Test Debug Server
With the debugging server open, you can open the browser (recommended for 360 Speed, Google Browser) input http://192.168.0.99:801/1.fsp Modify IP based o ...
Posted by pleisar on Sun, 21 Nov 2021 09:40:45 -0800
Deploying HAproxy+Nginx+NFS Load Balancing for High Availability Clusters under Centos7
Prepare tool:
1.Four centos7 servers, one client
In this experiment, four servers are used, one server installs haproxy for scheduling, the other two servers build nginx to provide web services, and one client tests access.
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HostsystemIPfunctionHAproxycentos7192.168.254.214HAproxynginxcentos7192.168.254.226nginxnginxcen ...
Posted by t3l on Sun, 21 Nov 2021 09:14:26 -0800
GFS distributed file system
catalogue
1, GFS overview
1. File system composition
2. File system role
3. File system components
4. GFS features
5. Working principle
2, GFS volume
1. GFS volume type
2. Characteristics of the three basic volumes
Distributed volume
Strip roll
Copy volume
Distributed striped volume
Distributed replication volume
3. Four server c ...
Posted by pck76 on Sun, 21 Nov 2021 01:16:01 -0800
chrony time synchronization service
brief introduction
NTP is the network time protocol, which is used to synchronize the time of each computer in the network. NTP and chrony cannot exist at the same time. You can only use one of them and remove the other mask Chrony is an open source free software, which can help you keep the system clock synchronized with the clock server (NTP ...
Posted by martinco on Sat, 20 Nov 2021 18:53:56 -0800
CL201 classroom notes - the road to RCHA certification - OpenStack DAY ONE - PM
DAY ONE - PM
There are two ways to modify the container configuration file:
Log in to DOCKER and modify the corresponding configuration file [root@controller0 ~] docker exec -it keystone bash
()[root@controller0 /] vi /etc/keystone/keystone.conf
Log in to controller0 to modify the configuration of container mapping. The following directo ...
Posted by adx on Sat, 20 Nov 2021 12:53:54 -0800
How to learn kernel? How Linux process management works (code demonstration)
Most of the Linux kernel is C language. It is recommended to first look at the Linux kernel development, Robert Love, that is, LKD.
Linux is a dynamic system, which can adapt to the changing computing needs. The performance of Linux computing requirements is centered on the general abstraction of processes. Processes can be short-term (a comma ...
Posted by trampolinejoe on Sat, 20 Nov 2021 07:15:23 -0800