[mysqld]

### mysql general option
bind-address    = 0.0.0.0
user            = mysql
pid-file        = /var/run/mysqld/mysqld.pid
socket          = /var/run/mysqld/mysqld.sock
port            = 3306
basedir         = /usr
datadir         = /var/lib/mysql
tmpdir          = /tmp
lc-messages-dir = /usr/share/mysql
skip-external-locking

### mysql optimization
# mandatory settings for galera
innodb_autoinc_lock_mode=2
innodb_locks_unsafe_for_binlog=1

# query cache is not supported with wsrep
query_cache_size=0
query_cache_type=0

# synchronous replication allows for some optimizations (this is not required):
innodb_flush_log_at_trx_commit=0 # or 2
innodb_doublewrite=0

#sync_binlog=0
#innodb_flush_log_at_trx_commit=0

max_connections=1024

innodb_buffer_pool_size=400M
innodb_log_file_size=64M

key_buffer_size = 256M
max_allowed_packet = 32M
table_open_cache = 256
sort_buffer_size = 2M
read_buffer_size = 2M
read_rnd_buffer_size = 4M
myisam_sort_buffer_size = 64M
thread_cache_size = 8
query_cache_size= 32M
# Try number of CPU's*2 for thread_concurrency
thread_concurrency = 4

#log_slave_updates

### galera settings
default_storage_engine=InnoDB
binlog_format=ROW
log_bin=mysql-bin

wsrep_cluster_name=libreit
wsrep_cluster_address=gcomm://
wsrep_node_name=NAME

wsrep_sst_method=xtrabackup
wsrep_sst_auth=root:PASSWORD

wsrep_provider=/usr/lib/libgalera_smm.so

# how many threads to use for applying slave writsets - cpu core * 2
wsrep_slave_threads=4

# change auto_increment_increment and auto_increment_offset automatically
wsrep_auto_increment_control=1

# enable "strictly synchronous" semantics for read operations
wsrep_causal_reads=0

# retry autoinc insert, which failed for duplicate key error
wsrep_drupal_282555_workaround=1

# Command to call when node status or cluster membership changes.
# Will be passed all or some of the following options:
# --status  - new status of this node
# --uuid    - UUID of the cluster
# --primary - whether the component is primary or not ("yes"/"no")
# --members - comma-separated list of members
# --index   - index of this node in the list
#wsrep_notify_cmd=

# how many times to retry deadlocked autocommits
wsrep_retry_autocommit=2