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In the actual production scenario, redis data may need to be migrated in the production environment due to the relocation of the server room or the replacement of the physical machine. So what should be done to migrate redis databases in redis-dump and redis-load? You know what? In order to let you know more about the method of migrating redis database, the editor summarizes the following contents. Let's look down together.

Generally speaking, there are three ways to migrate redis data:

1. Third-party tool redis-dump,redis-load

2. Aof mechanism. You need to enable aof function.

3. Rdb storage mechanism

Here is the first way to export data through redis-dump and then import it through redis-load. Let's go.

Step 1: install gcc

The terminal executes the gcc command, and if prompted without this command, it needs to be installed. Otherwise skip this step

Yum-y install gcc automake autoconf libtool make

Step 2: configure the Ruby official network source address

Because the default Ruby official network source address is abroad, and the access speed is very slow, it needs to be configured as a domestic source address.

Gem sources-a http://gems.ruby-china.org/ add domestic source address gem source-l check whether gem source has been added successfully-- remove http://rubygems.org/ remove foreign source address gem source-l confirm that the current source address is only domestic

Step 3: install the rvm command

Configure Google DNS / etc/resolv.conf nameserver 8.8.8.8gpg2-- keyserver hkp://keys.gnupg.net-- recv-keys D39DC0E3 curl-L get.rvm.io | bash-s stableecho "export rvm_max_time_flag=20" > > ~ / .rvmrc

Step 4: install Ruby

Rvm install 2.3.3

Step 5: confirm the Ruby version

Because redis-dump must require that the version of ruby be no less than 2.2.2

Ruby-v

If the output is ruby 2.3.3xxx, you are using the correct version and skip to the next step. Otherwise, you also need to do the following:

Rvm use 2.3.3-default

Set the version that uses ruby by default to 2.3.3.

Rvm remove $version

Delete the old version, $version is the version found by ruby-v, just specify the previous numeric version number.

Step 6: install redis-dump

Gem install redis-dump-V

Step 7: confirm that redis-dump is installed successfully

Find /-iname redis-dump

Step 8: redis-dump export data

All data exported with redis-dump are in json format.

Redis-dump-u: yourpassword@127.0.0.1:6379 > / tmp/redis-mv.json pay attention to change it to your own password, and remove it if you don't have one.

Step 9: move the exported data file to the imported redis server

Step 10: redis-load Import data

Cat redis-mv.json | redis-load-u: yourpassword@127.0.0.1:6379 pay attention to change it to your own password. If you don't have one, remove it.

At this point, the data is migrated. Don't forget to check and verify the imported redis.

The above is a brief introduction of how to migrate redis database by redis-dump and redis-load. Of course, the differences in the detailed use of the above have to be understood by everyone. If you want to know more, welcome to follow the industry information channel!

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