Redis data migration (III)

redis-dump The way

Installation environment depends on ：

install RVM

See if it is installed ruby , Or the currently installed version

ruby -v

install ruby Environmental Science

// To configure DNS analysis 
vi /etc/hosts
199.232.28.133 raw.githubusercontent.com
// Install the secret key 
gpg --keyserver hkp://keyserver.ubuntu.com:80 --recv-keys 94558F59
// The following command needs to be executed many times , To succeed , Maybe due to network problems , The specific reason is not clear 
curl -L get.rvm.io | bash -s stable

install ruby

find / -name rvm -print
source /usr/local/rvm/scripts/rvm
rvm list known
rvm remove 2.0.0
rvm install 2.7.0

Installation succeeded. Check the version number

The above screenshot shows that the installation was successful

redis-dump install

remove gem Bring your own source （ Slow downloading of us servers ）

gem sources --remove https://rubygems.org/

Add domestic sources

gem sources -a https://gems.ruby-china.com

View source

gem sources -l

``

// install redis-dump
gem install redis-dump -V

Verify that the installation was successful

Now let's start using redis-dump The tool exports the response data
Export to this machine redis The library is 0 All of the key value

redis-dump -u 127.0.0.1:6379 -d 0  > redis216.txt

see redis Corresponding to all keyz value

Export file view

vim redis216.txt 

The comparison of the above two figures can verify that the export is successful
Use redis-load Command import data

First, export the redis The file is sent to the machine to be imported , You need to enter the machine password for confirmation

scp redis216.txt root@10.0.8.152:/usr/software

View the target machine key List of values

It can be seen that the target machine is temporarily unavailable key value
After executing the Import command

cat redis216.txt | redis-load -u 127.0.0.1:9010 -d 0

So far we have finished using redis-dump Import and export of tools
Two different commands for import , Example

// Mode one 
cat redis216.txt | redis-load -u 127.0.0.1:9010 -d 0

// Mode two 
< redis216.txt | redis-load -u 127.0.0.1:9010 -d 0