diff options
| -rw-r--r-- | manifests/profile/pacemaker/database/mysql.pp | 79 | ||||
| -rw-r--r-- | releasenotes/notes/innodb_flush_log_at_trx_commit-eb7d99749ca3c911.yaml | 17 |
2 files changed, 61 insertions, 35 deletions
diff --git a/manifests/profile/pacemaker/database/mysql.pp b/manifests/profile/pacemaker/database/mysql.pp index 22adbe9..b9f2a65 100644 --- a/manifests/profile/pacemaker/database/mysql.pp +++ b/manifests/profile/pacemaker/database/mysql.pp @@ -52,6 +52,13 @@ # connections from other nodes in the cluster. # Defaults to hiera('mysql_bind_host') # +# [*innodb_flush_log_at_trx_commit*] +# (Optional) Disk flush behavior for MySQL under Galera. A value of +# '1' indicates flush to disk per transaction. A value of '2' indicates +# flush to disk every second, flushing all unflushed transactions in +# one step. +# Defaults to hiera('innodb_flush_log_at_trx_commit', '1') +# # [*step*] # (Optional) The current step in deployment. See tripleo-heat-templates # for more details. @@ -62,14 +69,15 @@ # Defaults to hiera('pcs_tries', 20) # class tripleo::profile::pacemaker::database::mysql ( - $bootstrap_node = hiera('mysql_short_bootstrap_node_name'), - $bind_address = $::hostname, - $ca_file = undef, - $certificate_specs = hiera('tripleo::profile::base::database::mysql::certificate_specs', {}), - $enable_internal_tls = hiera('enable_internal_tls', false), - $gmcast_listen_addr = hiera('mysql_bind_host'), - $step = Integer(hiera('step')), - $pcs_tries = hiera('pcs_tries', 20), + $bootstrap_node = hiera('mysql_short_bootstrap_node_name'), + $bind_address = $::hostname, + $ca_file = undef, + $certificate_specs = hiera('tripleo::profile::base::database::mysql::certificate_specs', {}), + $enable_internal_tls = hiera('enable_internal_tls', false), + $gmcast_listen_addr = hiera('mysql_bind_host'), + $innodb_flush_log_at_trx_commit = hiera('innodb_flush_log_at_trx_commit', '1'), + $step = Integer(hiera('step')), + $pcs_tries = hiera('pcs_tries', 20), ) { if $::hostname == downcase($bootstrap_node) { $pacemaker_master = true @@ -109,33 +117,34 @@ class tripleo::profile::pacemaker::database::mysql ( $mysqld_options = { 'mysqld' => { - 'skip-name-resolve' => '1', - 'binlog_format' => 'ROW', - 'default-storage-engine' => 'innodb', - 'innodb_autoinc_lock_mode' => '2', - 'innodb_locks_unsafe_for_binlog'=> '1', - 'innodb_file_per_table' => 'ON', - 'query_cache_size' => '0', - 'query_cache_type' => '0', - 'bind-address' => $bind_address, - 'max_connections' => hiera('mysql_max_connections'), - 'open_files_limit' => '-1', - 'wsrep_on' => 'ON', - 'wsrep_provider' => '/usr/lib64/galera/libgalera_smm.so', - 'wsrep_cluster_name' => 'galera_cluster', - 'wsrep_cluster_address' => "gcomm://${galera_nodes}", - 'wsrep_slave_threads' => '1', - 'wsrep_certify_nonPK' => '1', - 'wsrep_max_ws_rows' => '131072', - 'wsrep_max_ws_size' => '1073741824', - 'wsrep_debug' => '0', - 'wsrep_convert_LOCK_to_trx' => '0', - 'wsrep_retry_autocommit' => '1', - 'wsrep_auto_increment_control' => '1', - 'wsrep_drupal_282555_workaround'=> '0', - 'wsrep_causal_reads' => '0', - 'wsrep_sst_method' => 'rsync', - 'wsrep_provider_options' => "gmcast.listen_addr=tcp://${gmcast_listen_addr}:4567;${tls_options}", + 'skip-name-resolve' => '1', + 'binlog_format' => 'ROW', + 'default-storage-engine' => 'innodb', + 'innodb_autoinc_lock_mode' => '2', + 'innodb_locks_unsafe_for_binlog' => '1', + 'innodb_file_per_table' => 'ON', + 'innodb_flush_log_at_trx_commit' => $innodb_flush_log_at_trx_commit, + 'query_cache_size' => '0', + 'query_cache_type' => '0', + 'bind-address' => $bind_address, + 'max_connections' => hiera('mysql_max_connections'), + 'open_files_limit' => '-1', + 'wsrep_on' => 'ON', + 'wsrep_provider' => '/usr/lib64/galera/libgalera_smm.so', + 'wsrep_cluster_name' => 'galera_cluster', + 'wsrep_cluster_address' => "gcomm://${galera_nodes}", + 'wsrep_slave_threads' => '1', + 'wsrep_certify_nonPK' => '1', + 'wsrep_max_ws_rows' => '131072', + 'wsrep_max_ws_size' => '1073741824', + 'wsrep_debug' => '0', + 'wsrep_convert_LOCK_to_trx' => '0', + 'wsrep_retry_autocommit' => '1', + 'wsrep_auto_increment_control' => '1', + 'wsrep_drupal_282555_workaround' => '0', + 'wsrep_causal_reads' => '0', + 'wsrep_sst_method' => 'rsync', + 'wsrep_provider_options' => "gmcast.listen_addr=tcp://${gmcast_listen_addr}:4567;${tls_options}", } } diff --git a/releasenotes/notes/innodb_flush_log_at_trx_commit-eb7d99749ca3c911.yaml b/releasenotes/notes/innodb_flush_log_at_trx_commit-eb7d99749ca3c911.yaml new file mode 100644 index 0000000..7dbd5a7 --- /dev/null +++ b/releasenotes/notes/innodb_flush_log_at_trx_commit-eb7d99749ca3c911.yaml @@ -0,0 +1,17 @@ +--- +features: + - | + Enable innodb_flush_log_at_trx_commit configuration for Galera only. +upgrade: + - | + Setting the innodb_flush_log_at_trx_commit flag to the value of "2" instead + of its default value of "1" means that the underlying MySQL/MariaDB engine + will no longer flush transactions to disk on a per-transaction basis; + instead, flushes occur once per second. This leads to far fewer + disk writes and can dramatically improve write performance, at the cost + of durability (e.g. will lose the last second's worth of transactions) + if the database engine is ungracefully shut down. The + clustered nature of Galera mitigates this risk in that transactions + are replicated to other nodes before completion, and the setting of + "2" is considered to be generally safe for a Galera cluster, with the + exception case of simultaneous power loss for all nodes. |