Oracle 5.0, Reference Manual

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Mysqlnd replication and load balancing plugin (
mysqlnd_ms
)
2655
PECL/mysqlnd_qc serves as a cache backend. PECL/mysqlnd_qc supports use of various storage
locations, among others main memory,
APC
and
MEMCACHE
.
Feature changes
• Added cache option to quality-of-service (QoS) filter.
• New configure option
enable-mysqlnd-ms-cache-support
• New constant
MYSQLND_MS_HAVE_CACHE_SUPPORT
.
• New constant
MYSQLND_MS_QOS_OPTION_CACHE
to be used with
mysqlnd_ms_set_qos
.
• Support for built-in global transaction identifier feature of MySQL 5.6.5-m8 or newer.
20.7.6.9.4. PECL/mysqlnd_ms 1.2 series
Copyright 1997-2012 the PHP Documentation Group. [2230]
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