MySQL one master multiple slaves + linear replication

Advantages of linear replication

Traditional one master multi slave replication for example A--->B   A---->C   A----->D Yes A The requirements of nodes are high

In order to alleviate A Node pressure We can use linear replication That is to say A------>B------->C

Now let's configure a group server1----->server2----->server3 Of mysql Linear replication structure

One 、 To configure slave node server3

First of all, make sure server1----->server2 Master slave copy succeeded ！ In the last blog section, I have talked about it in detail .

Then configure server3  from server1.2 Copy various configuration files to server3

 

Build users + Create directory （server3 On ）

  Add Directory

modify server3 Of myconf file (id To work with server1 server2 Different ）

  initialization + Set up mysql password

Access to database   Because you need to back up basic data   Establishment of important counties westos database

Come here    server3 The basic configuration of the database has been completed  

But because of server1 server2 The database itself has some data    If you want to set linear replication   The basic data must be consistent

So back up the basic data And send it to server3

Two 、 The backup data And send it to server3

from server1 Backup westos data and Send to server3

stay server3 Send the backed up data to the database

  After sending successfully The discovery of entering the database The basic data has been exactly the same

3、 ... and 、 To configure server2----->server3

In the previous master-slave replication   server2 As slave  stay Linear replication server2 Accomplished master  Again slave

So we need to configure again server2------>server3

Start binary thread   As master The second process must be started

  Next configure server2------->server3（server2 As master  server3 As slave)

Get into server2 The database of   establish repl User and authorization

see file poistion And Insert new data  

  Get into server3 The database of

Establish master-slave replication And open

  see sever3 slave state

There are two yes Indicating successful configuration ！

Four 、 test

stay srver3 Database view data And server1 It's exactly the same

however server3 Data is copied server2 d Of

  stay srver2 Database view data And server1 It's exactly the same