master slave replication mongodb

I. Principles of Replication MySQL replication tracks all database changes (updates, deletions, and so on) in binary logs based on the master server ). Each slave server receives updates recorded by the master server to the storage of its binary logs from the

check bit, if the network transmission problems can be resumed, such as a breakpoint,Three. Master the Binlog file through a line called dump path to Slave, slave will receive an event written to a file called Relay log (relay log), and then according to relay log with a call applier something to commit ( Write datafile, and Binlog)The Binlog and relay log conte

One, main library thread status (state) valueThe following list shows the most common states (show processlist) that may be seen in the State column of the Binlog dump thread of the primary server in master-slave replication. If the Binlog dump thread is not visible on the primary server, this means that replication is

The second part was intended to test whether the master server was suspended and the slave server was upgraded. However, an accident occurred. Instead, it was used to test how to recover a slave server when it was suspended. Put the failure of the master server in the third part. Continue to test with mysql: sandbox. T

Recently, when I deployed The MySQL master-slave replication architecture, I encountered "Last_IO_Error: Fatal error: The slave I/O thread stops because master and slave have equal MySQL server UUIDs; these UUIDs must be diff

sleeps and waits for the primary server to generate new events,which the I/O thread writes to the relay log. SQL handles the last step of the process from the thread, and the SQL thread reads the events from the log and replays the events in them to update the data from the service so that it is consistent with the data in the master service. As long as the thread is consistent with the I/O thread, the trunk log is typically located in the Os cache,

In the previous article "mud: learning the principles of mysql database master-slave synchronous replication", we introduced the basic principles of mysql master-slave replication. In this article, we will test the

replication: (1) Master changes the record to binary log (these are called binary log events, binary logs event);(2) Slave copies the binary log events of master to its trunk logs (relay log);(3) Slave redo the event in the trunk log and change the data to reflect its own.

Tags: identified server user login status Master AB replication (master-slave replication)you can have MySQL implement:1. Data backup (master server data is all synchronized to slave s

write in front: If this article is fortunate enough to be seen by a friend and found wrong, I hope to criticize. If you do not understand the place, we would like to discuss together. Fundamentals of MySQL Replication Basic issues that MySQL replication solvesKeep the data of one MySQL server in sync with the data from other MySQL servers.How MySQL replic