Hi All!
I am having a Problem with getting mariadb works flawless using a
Master/Slave[1] <=> Master/Slave[2] <=> Master/Slave[3]
If you want to have synchronous replication across all 3 servers I would NOT recommend using this kind of setup. Please use Galera Cluster instead.
The First Time i was able to insert a row on the Master[1] Server
and the data was reproduced/replicated to all servers.
At this Time i thinked everything is fine now.
But then when i tryed to deleted the new Created Row on Master[1]
the Data was only deleted on the Master[1] Server while
the others Servers [2] and [3] still had the data!
Probably something in your settings is wrong and/or servers are not replicating. For example you have: binlog_do_db = logedin_users
This means that statements will only replicate if you are connected to this DB.
I expected that the deleted row should be also deleted on all
master/slave servers but it did not!
How can i solve this Problem? And what is actually the Problem with
MySQL/MariaDB? I am getting the impression that MariaDB is really bad
when it comes to Replication/Sync of Data in a Distributed Architecture.
I recommend you read some more documentation and refer to the MariaDB KB about use cases and replication configuration.
As a Example let say on server has to reboot because of a Cloud
maintenance. From what i see this MaraiDB server will be forever
corrupted after the restart and never sync again as first it has to
manually be adjusted to the master bin log position and second it has
also be told to work as a slave after this.
You shouldn't have to do this if you've configured your servers and replication correctly.
As mentioned before if you need a three server cluster setup I recommend using MariaDB Galera Cluster. It is easy to set up in MariaDB 10.1.
Best regards
GL
Not really what i would expect from a autonomous replicating Master
Slave Data Base Server after a restart!
Hope somebody can tell me how to resolve all this Sync Problems so
finally MariaDB Master/Slave Database Server work flawless without to
worry that sooner or later a node or a few of them will get useless and
corrupted!
Thanks in advance for any helpful Tip and Answer!
A example of my my.cnf Master/Slave[2] Server changes!
server-id = 2
replicate-same-server-id = 0
auto-increment-increment = 8
auto-increment-offset = 1
log_bin = /var/log/mysql/mariadb-bin
log_bin_index = /var/log/mysql/mariadb-bin.index
# not fab for performance, but safer
sync_binlog = 1
expire_logs_days = 10
max_binlog_size = 100M
binlog_do_db = logedin_users
binlog-format = ROW
# slaves
relay_log = /var/log/mysql/relay-bin
relay_log_index = /var/log/mysql/relay-bin.index
relay_log_info_file = /var/log/mysql/relay-bin.info
log_slave_updates = 1
#read_only
binlog-checksum = 1
master_verify_checksum = 1
relay_log_recovery = 1
slave_compressed_protocol = 1
slave_sql_verify_checksum = 1
sync_master_info = 1
sync_relay_log = 1
sync_relay_log_info = 1
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