I am using MySQL 5.5
I have successfully configured master slave. It is working for all new updates.
But,I want to configure master slave with existing data
My database contains huge data. It has xmls and PDFs stored in DB. So taking dump and importing in slave will take more time.
I want to configured with no down time.
Related
Hi I have an existing mysql master-master replication between 3 servers and all the servers are connected to each other. I'm replicating some tables in a specific database. there is about 80 tables in this database and only 10 of them is replicating. I'm using replicate-do-table option in my mysql config file to tell mysql which tables should be replicated.
In this stage I found that I need another table to be replicated which was not replicated before. When I add new table to mysql config file, Newly added data are coming to all the server but old existing data are not coming. what should I do to bring older data to all the servers.
this is my mysql config file
default_table_encryption=ON
table_encryption_privilege_check=ON
replica_parallel_workers=4
enforce_gtid_consistency=ON
gtid_mode=ON
keyring_file_data=.....
early-plugin-load=keyring_file.so
skip_replica_start=OFF
auto_increment_increment=50
auto_increment_offset=1
server_id=3
replicate_same_server_id=0
replicate-do-db=db
replicate-do-table=db.table1
replicate-do-table=db.table2
replicate-do-table=db.table3
replicate-do-table=db.table4
replicate-do-table=db.table5
replicate-do-table=db.table6
replicate-do-table=db.table7
replicate-do-table=db.table8
replicate-do-table=db.table9
replicate-do-table=db.table10
replicate-do-table=db.table11
replicate-do-table=db.table12
slave-skip-errors=1032
I am trying to configure MySQL databases using the Master-Slave replication. Before I realized that I had to set up my environment using this replication, I already have 2 separate servers running their own MySQL DB. Each of these servers are configured the exact same. The MySQL DB are configured with hundreds of tables.
Is there a way that i can set up (Master-Slave) Replication using the configured DB's? Or will i have to start from scratch and configure the replication first and then load in all the DB tables?
You can delete all data from one of the servers. Remaining one with the data will be your Master. Then use mysqldump to backup all the data and insert it to the slave.
Take a look for the detailed instructions on the page below:
https://livecaller.io/blog/how-to-set-up-mysql-master-slave-replication/
If the data is exactly same in both the MySQL database then you can start master slave replication, but you need to be sure that the data is same. MySQL will not check that, and if there is some discrepancy in the primary key then it will throw error immediately after next DML statement.
To be on a safer side, drop the database from one server, and restore it using the MySQL dump of another server. This will give the surety that database is same on both the server.
Take the reference from the below link to establish replication between two MySQL servers.
https://www.digitalocean.com/community/tutorials/how-to-set-up-master-slave-replication-in-mysql
I am having a difficult time in setting Master-Slave configuration.
Master Database runs on Ubuntu( Amazon AWS instance) and successfully set-up master replication.
I have localhost as a Slave Server. (Windows Machine).
Snapshot of Master Database
Master database has record
Binar Log Information
Process List on Master Replication
Status of Master Replication
I debug master replication which works okay I guess.
On the Salve Side:
Status on Slave Side
Even though MASTER_LOG and MASTER_POS are synced but data doesn't.
Currently, I have 0 table on Slave side and 34 tables on Master side.
Tables on Slave side
I am open to any suggestion or any reference do you have.
I spend an entire day and trying to find what I did wrong.
I want to Sync my Local database with a database hosted on remote-server.
Update: Thigs I did to debug the Master-Slave Replication
Checked Master Database is up and running.
Master Status and Connected Slaves. [Which includes unique id for
each server.]
Slave database is up and running [Including Slave IO Thread and
SQL thread is running.]
These three steps ensure that Master-Slave replication is up and running without any problem.
Handling Data Sync Problem
Created/update/delete data in the master database to check
whether data is sync on a server or not.
Checked Binary Log [Specifically I checked the file size. If I
entered data file size will continuously increasing.]
Thanks in advance.
we had similar problem - read more about gotchas in "binlog-do-db" and "replication-do-db" and related parameters. Here is a big problem with crossdatabase references. At the and we had to remove these settings limiting replication.
Why MySQL’s binlog-do-db option is dangerous
Gotchas in MySQL replication
As your show slave status output says you enabled Replicate_DO_DB for the DB "Arihantpos" at the same time you did Binglog_Do_Db for the same db
try to remove Binglog_Do_Db from config file and restart mysql and start replication again
I am using mysqldump to move my database to another sever. But database has tables with million of rows and mysql restore takes too long(4 houres).
is there any way I do this faster?
Here's the way I have done this in the past using mysql replication
Dump SQL on source machine with binary logging turned on (use the --master-data option) this will give you data at that point in time and allow you to import the data on your new server while new data is being populated on the old server.
after the import (4 hours you said?) then you can START SLAVE on the new server and the new server will replay the binary logs and catch up to the old server and keep in sync until the actual switchover happens.
How to setup mysql replication
Yes, you can kill the mysqld on the source server, once it is down you can copy the entire datadir to the new server and start both servers once copy is done.
I have an existing mysql replication set up (Windows 2008 to Ubuntu 9.04) and created several new tables in the master database. These are not showing up in the slave database.
Do new tables automatically get copied to the slave DB, or do I need to set up replication again?
Thanks!
I'm going to assume that other data is successfully replicating.
Replication in mysql is per-server, so the most likely problems are that either you aren't binloging the events, or that the slave is ignoring them.
For binglogs, verify you aren't turning sql_log_bin off for the connection (which would require SUPER) and that the various options binary-log options are set correctly. You can verify this by running mysqlbinlog on the server's binlogs.
On the slave side, check the replication options.