MySQL Cluster 7.2 (DMR2): NoSQL, Key/Value, Memcached

70x Higher Performance, Cross Data Center Scalability and New NoSQL Interface

Its been an exciting week for all involved with MySQL Cluster, with the announcement of the second Development Milestone Release (7.2.1) at Oracle Open World. Highlights include:

- Enabling next generation web services: 70x higher complex query performance, native memcached API and integration with the latest MySQL 5.5 server

- Enhancing cross data scalability: new multi-site clustering and enhanced active/active replication

- Simplified provisioning: consolidated user privileges.

You can download the DMR for evaluation now from: http://dev.mysql.com/downloads/cluster/ (select Development Milestone Release tab).

You can also read up on the detail of each of these features in the new article posted at the MySQL Developer Zone. In this blog, I’ll summarize the main parts of the announcement.

70x Higher Performance with Adaptive Query Localization (AQL)

Previewed as part of the first MySQL Cluster DMR, AQL is enabled by a new Index Statistics function that allows the SQL optimizer to build a better execution plan for each query.

As a result, JOIN operations are pushed down to the data nodes where the query executes in parallel on local copies of the data. A merged result set is then sent back to the MySQL Server, significantly enhancing performance by reducing network trips.

Take a look at how this is used by a web-based content management to increase performance by 70x

Adaptive Query Localization enables MySQL Cluster to better serve those use-cases that have the need to run real-time analytics across live data sets, along with high throughput OLTP operations. Examples include recommendations engines and clickstream analysis in web applications, pre-pay billing promotions in mobile telecoms networks or fraud detection in payment systems.

New NoSQL Interface and Schema-less Storage with the memcached API

The memcached interface released as an Early Access project with the first MySQL Cluster DMR is now integrated directly into the MySQL Cluster 7.2.1 trunk, enabling simpler evaluation.

The popularity of Key/Value stores has increased dramatically. With MySQL Cluster and the new memcached API, you have all the benefits of an ACID RDBMS, combined with the performance capabilities of Key/Value store.

By default, every Key / Value is written to the same table with each Key / Value pair stored in a single row – thus allowing schema-less data storage. Alternatively, the developer can define a key-prefix so that each value is linked to a pre-defined column in a specific table.

Of course if the application needs to access the same data through SQL then developers can map key prefixes to existing table columns, enabling Memcached access to schema-structured data already stored in MySQL Cluster.

You can read more about the design goals and implementation of the memcached API for MySQL Cluster here.

Integration with MySQL 5.5

MySQL Cluster 7.2.1 is integrated with MySQL Server 5.5, providing binary compatibility to existing MySQL Server deployments. Users can now fully exploit the latest capabilities of both the InnoDB and MySQL Cluster storage engines within a single application.

Users simply install the new MySQL Cluster binary including the MySQL 5.5 release, restart the server and immediate have access to both InnoDB and MySQL Cluster!

Enhancing Cross Data Center Scalability: Simplified Active / Active Replication

MySQL Cluster has long offered Geographic Replication, distributing clusters to remote data centers to reduce the affects of geographic latency by pushing data closer to the user, as well as providing a capability for disaster recovery.

Geographic replication has always been designed around an Active / Active technology, so if applications are attempting to update the same row on different clusters at the same time, the conflict can be detected and resolved. With the release of MySQL Cluster 7.2.1, implementing Active / Active replication has become a whole lot simpler. Developers no longer need to implement and manage timestamp columns within their applications. Also rollbacks can be made to whole transactions rather than just individual operations.

You can learn more here.

Enhancing Cross Data Center Scalability: Multi-Site Clustering

MySQL Cluster 7.2.1 DMR provides a new option for cross data center scalability – multi-site clustering. For the first time splitting data nodes across data centers is a supported deployment option.

Improvements to MySQL Cluster’s heartbeating mechanism with a new “ConnectivityCheckPeriod” parameter enables greater resilience to temporary latency spikes on a WAN, thereby maintaining operation of the cluster.

With this deployment model, users can synchronously replicate updates between data centers without needing conflict detection and resolution, and automatically failover between those sites in the event of a node failure.

Users need to characterize their network bandwidth and latencies, and observe best practices in configuring both their network environment and Cluster. More guidance is available here.

User Privilege Consolidation

User privilege tables are now consolidated into the data nodes and centrally accessible by all MySQL servers accessing the cluster.

Previously the privilege tables were local to each MySQL server, meaning users and their associated privileges had to be managed separately on each server. By consolidating privilege data, users need only be defined once and managed centrally, saving Systems Administrators significant effort and reducing cost of operations.

Summary

The MySQL Cluster 7.2.1 DMR enables new classes of use-cases to benefit from web-scale performance with carrier-grade availability.  We also have a great webinar coming up on Wednesday October 19th  where the engineering and product management team will discuss the enhancements in more detail, and how you can use them today. You can sign up here.

You can download the DMR for evaluation now from: http://dev.mysql.com/downloads/cluster/ (select Development Milestone Release tab).

You can learn more about the MySQL Cluster architecture from our Guide to scaling web databases

Let us know what you think of these enhancements directly in comments of this or the associated blogs. We look forward to working with the community to perfect these new features.

Comments:

Awesome. I can't wait to try out the 7.2 version.

Posted by guest on November 02, 2011 at 12:27 PM GMT #

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