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What do you need to know about GTID replication?
The first thing that we need to know is that now Binary Logs and Position are not needed anymore with GTID enabled. Instead, we need to know in which GTID is the master and set it on the slave. MySQL keeps two global variables with GTID numbers on it:
Can you create a new slave using GTID?
One thing that worths to mention is that if you want GTID support log_slave_updates will need to be enabled in slave server and the performance impact should be taken in account. Anyway, this post tends to be more practical, we will see how to create/restore new slaves from a master using GTID.
Where do I find GTID numbers in MySQL?
MySQL keeps two global variables with GTID numbers on it: gtid_executed: it contains a representation of the set of all transaction logged in the binary log gtid_purged: it contains a representation of the set of all transactions deleted from the binary log
What’s the new MySQL 5.6 GTID support?
MySQL 5.6 is GA! Now we have new things to play with and in my personal opinion, the most interesting one is the new Global Transaction ID (GTID) support in replication. This post is not an explanation of MySQL replication find query with GTID and how it works internally because there are many documents about that:
What happens when a slave misses a GTID transaction?
One of the most important things to keep in mind regarding GTID is that a slave, when connecting to the master, checks if it is missing any transactions which were executed on the master. These are called errant transactions. If a slave finds such transactions, it will execute them. Let’s assume we ran following SQL to clear an offending row: ?
What do you need to know about GTID in MySQL?
It’s not important anymore in which binary log position a transaction was recorded, all you need to know is the GTID: ‘966073f3-b6a4-11e4-af2c-080027880ca6:4’. GTID is built from two parts – the unique identifier of a server where a transaction was first executed, and a sequence number.
Why is MariaDB GTID replication fully asynchronous?
The MariaDB GTID replication is fully asynchronous, and fully flexible in how it can be configured. This makes it possible to use it in ways where the assumption that binlog sequence is the same on all servers is violated. In such cases, when changing primary, GTID will still attempt to continue at the point of current GTID in the new binlog.