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.