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PECL/mysqlnd_ms 1.2 series

1.2.1-beta

• Release date: 01/2012
• Motto/theme: see 1.2.0-alpha

Minor test changes.

1.2.0-alpha

• Release date: 11/2011
• Motto/theme: Global Transaction ID injection and quality-of-service concept

In version 1.2 the focus continues to be on supporting MySQL database clusters with asynchronous replication. The plugin tries to make using the cluster introducing a quality-of-service filter which applications can use to define what service quality they need from the cluster. Service levels provided are eventual consistency with optional maximum age/slave slag, session consistency and strong consistency.

Additionally the plugin can do client-side global transaction id injection to make manual master failover easier.

Feature changes

• Introduced quality-of-service (QoS) filter. Service levels provided by QoS filter:

  • eventual consistency, optional option slave lag
  • session consistency, optional option GTID
  • strong consistency

• Added the mysqlnd_ms_set_qos() function to set the required connection quality at runtime. The new constants related to mysqlnd_ms_set_qos() are:

  • MYSQLND_MS_QOS_CONSISTENCY_STRONG
  • MYSQLND_MS_QOS_CONSISTENCY_SESSION
  • MYSQLND_MS_QOS_CONSISTENCY_EVENTUAL
  • MYSQLND_MS_QOS_OPTION_GTID
  • MYSQLND_MS_QOS_OPTION_AGE

• Added client-side global transaction id injection (GTID).

• New statistics related to GTID:

  • gtid_autocommit_injections_success
  • gtid_autocommit_injections_failure
  • gtid_commit_injections_success
  • gtid_commit_injections_failure
  • gtid_implicit_commit_injections_success
  • gtid_implicit_commit_injections_failure

• Added mysqlnd_ms_get_last_gtid() to fetch the last global transaction id.

• Enabled support for multi master without slaves.