[mysqld]

# General
binlog_format           = ROW
character_set_server    = utf8mb4
collation_server        = utf8mb4_general_ci
default_storage_engine  = InnoDB
local_infile            = 0
max_allowed_packet      = 256M
max_connections         = 750
skip_external_locking   = ON
skip_name_resolve       = ON

# Binary logging and replication
expire_logs_days        = 7
gtid_domain_id          = 1000
gtid_ignore_duplicates  = ON
gtid_strict_mode        = ON
log_bin                 = binlog
log_slave_updates       = ON
server_id               = <%= @server_id %> 
<% if not @replicate_rewrite_db.nil? -%>
replicate-rewrite-db    = "<%= @replicate_rewrite_db %>->nextcloud"
replicate-wild-do-table = <%= @replicate_rewrite_db %>.%
<% end -%>

# Innodb
innodb_autoinc_lock_mode        = 2
innodb_buffer_pool_size         = 4G # 60-75% of total RAM
innodb_file_per_table           = 1
innodb_flush_log_at_trx_commit  = 0
innodb_flush_method             = O_DIRECT
innodb_io_capacity              = 2000 # IOPS dependent
innodb_io_capacity_max          = 4000 # IOPS dependent
innodb_log_file_size            = 512M
innodb_read_io_threads          = 4    # CPU dependent
innodb_rollback_on_timeout      = 1
innodb_write_io_threads         = 4    # CPU dependent
transaction_isolation           = 'READ-COMMITTED'

# Galera
wsrep_cluster_name              = "Nextcloud_MariaDB_Cluster"
wsrep_gtid_domain_id            = 1000 # same on all Galera nodes in the same segment
wsrep_gtid_mode                 = ON
wsrep_log_conflicts             = ON
wsrep_on                        = ON
wsrep_provider                  = /usr/lib/galera/libgalera_smm.so
wsrep_provider_options          = "gcache.size=2G;gmcast.segment=0" # gmcast.segment same on all Galera nodes in the same segment
wsrep_slave_threads             = 4    # CPU dependent
wsrep_sst_method                = mariabackup
wsrep_sync_wait                 = 1