I have been trying to start replication in a mysql database. I followed all the steps from the mysql manual to setup and configure the replication.
http://dev.mysql.com/doc/refman/5.1/en/replication-howto.html
I could start the replication without any trouble. Newly inserted data was replicated properly.
But after a while I observed that though INSERT are working, the UPDATEs are not replicating. So, my replicated database contains data just as it was inserted first time.
My master database is on an UNIX server with MYSQL-5.1.56. The slave is used in Windows using WAMP package with MYSQL 5.5.8. I have also tried a slave with lower version mysql with WAMP5, with same effect.
Please share your ideas and experience on this. Thanks.
I have similar problem. I know it's old thread but it can help others:
link: mysql replication works only if I choose database by USE database
I sorted it out a few months ago. The problem was, I tried to replicate only one single database, and set binlog_do_db and binlog-ignore-db options in master to select only that database. But that left out any statement which was executed without selecting database by USE database, as kayn said. Using replicate-ignore-db and replicate-do-db options in slave would do the same. So I finally fixed it by using the replicate-wild-do-table option in the slave, referenced here. Added the following line in the configuration of the slave server.
replicate-wild-do-table=mydb.%
Related
In my setup there are two debian servers. The first one is the old production server and the second is the new one. On the first (old) one runs a mysql v5.5 db-server and an old application which lags support. It cannot be ported easily to the new server. The new server runs mariadb v10.1 and all the other applications were ported from the old server to this new one. These applications have to work also with the data of the application that cannot be ported.
The ported application can only access local databases. So there is no easy way of changing the connection for these apps to the old db server.
My idea:
I want to replicate (master->slave) the data of the one database (used by the old application that is not portable) of the mysql v5.5 db server to the maraidb v10.1 db-server.
No problem so far.
But the applications on the new server not only read the data of the old application, they can also modify them. And they also have there own databases that only exists on the new server. This is a problem as far as I know and can lead to the break of the replication in some situations if the applications would try to write at the replicated database on the slave.
My next thought to solve this was that I can make use of a sql dispatcher proxy and found some interesting ones (mariadb maxscale, haproxy, proxySQL) but as far as I understood they can split read and write operations but I couldn't find a way to route write operations for different databases to different servers.
Can Anybody give me a hint to solve this problem?
Setting:
Server 1 - Mysql v5.5 - database_1
Server 2 - Mariadb v10.1 - database_1, database_2, database_3
An application on server 1 is writing and reading data from database_1 on server 1.
Other applications on server 2 are reading and writing data to database_1 on server 2.
So the data of database_1 have to be replicated from server 1 to server 2 and could be changed there.
A master-master replication instead of master-slave could work, but in reason of auto_increment fields that could break the replication and in reason of the fact that the changed data from server 2 doesn't have to exist on server 1, I think this is not the way to go. (I'm aware that I could set the auto_increment interval to two to avoid this problem, but it's an already running production system, so changes like this are not so easy).
At the moment we're doing backups by hand and copy them over but that's way to slow and I'm sure there is a better way ;)
You can use write to a replication slave (server 2) for databases like database_2 and database_3 that will never appear in the replication scream.
If you started updating database_1 you probably would end up in trouble.
You are replicating between two database server of over a major version difference so there is the possibility that a deprecated SQL statement gets replicated to a server that has it removed and the replication will stop. Keep an eye out for this in the weeks after deployment. binlog_format=ROW may mitigate some of the SQL that could got incorrectly.
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
How do I go about setting up replication on the same mysql server, i.e master and slave both will be the same server?
My requirement is this: I want to replicate few tables on db2 with db1 located on the same server but not all the tables.
I searched the whole the net there are few example like shown here http://www.ruturaj.net/tutorials/mysql/replication/same-server-rewrite-database
but doesn't work for me.
And many examples which explain about the replication setup on two different server
Can anybody please redirect me to the right link, if any available?
Thanks
Not a big deal; just set up two mysql servers on two different port number.
I've used to choose 3306 for master, and 3307 for slave.
Create a new my.cnf for slave server. ( name it my_slave.cnf )
Edit my_slave.cnf : make it using another port, and put slave settings in it.
Duplicate startup script : /etc/init.d/mysqld to /etc/init.d/mysqld_slave
( or add new commands slavestart, slavestop in it. )
And this is my - very - subjective opinion : separate to-be-replicated and not-to-be-replicated on [database] level not on table level. MySQL supports detailed configuration for replication level, but it'll be very complicated and make others confused after months, years later.
I want to create Database replication i try but some problem is there so give me full steps of How To Set Up Database Replication In MySQL
Never done it personally at work but we do use it.
Seems that you want to setup a master/slave setup, the slave beeing the replicated server.
http://dev.mysql.com/doc/refman/5.0/en/replication-howto.html (check the documentation is up to date with your mysql version.)
Here is a step by step instruction how to get MySQL master-slave replication automatically installed and later scaled http://blog.jelastic.com/2017/03/14/scalable-mysql-master-slave-replication/ (if you are ready to run this cluster in the specific cloud)
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.