Friday, 30 January 2015

Infinispan 7.1.0 Final Released

Dear Infinispan community,

I am proud to announce the release of Infinispan 7.1.0 Final today.

This release contains a couple new features and a handful of enhancements to features introduced in 7.0.  You can find out more details at the Current Release Notes page.
 
The highlighted features/enhancements are (in case if the release notes page isn't updating)
  1. Near cache for Hot Rod clients
  2. Domain statistics
  3. Better partition handling
  4. Cluster listener performance enhancements
  5. Indexing usability improvement
  6. Local entry iterator improvements
  7. New CLI uber jar
Feel free to join us and shape the future releases on our forums, our mailing lists or our #infinispan IRC channel.

For a complete list of features and bug fixes included in this release, please refer to the release notes.  There are quite a few other issues not mentioned here. Visit our downloads section to find the latest release.
 
Thank you everyone for your involvement and contributions!

Friday, 23 January 2015

Infinispan 7.1.0.CR2 released

Dear Infinispan community,

In the spirit of "release early, release often" we are proud to announce the Infinispan 7.1.0CR2 release. We skipped CR1 as our Nexus repository experienced transient issues after we published the artifacts.

CR2 is mostly a maintenance release. Beta1 brought us a lot of major improvements that we further ironed out in CR2 release. There are a few component upgrades and a new feature worth mentioning - exposing cluster and node based statistics to DMR. 

Feel free to join us and shape the future releases on our forums, our mailing lists or our #infinispan IRC channel.

For a complete list of features and bug fixes included in this release, please refer to the release notes. Visit our downloads section to find the latest release.

Infinispan is back to FOSDEM!


Please join us in Brussels next Saturday, 31st January, to get to know more about Infinispan advanced querying capabilities in the session "Querying your datagrid with Lucene, Hadoop and Spark"


Wednesday, 14 January 2015

A Factory of Atomic Objects

Distributed systems aggregate large numbers of heterogeneous components that are subject to failures and asynchrony. To tame such a capricious nature, systems designers resort to non-blocking techniques such as state machine replication. This approach provides consistent non-blocking operations to a shared object replicated at a quorum of machines. State machine replication is a classical paradigm to consistently orchestrate concurrency between remote processes in a distributed system, and as such a weapon of choice to manage metadata operations. This approach is at work in many services such as Apache ZooKeeper, Google Chubby, or Open Replica.

The (experimental) atomic object factory module is an implementation of the state machine replication paradigm over Infinispan. Using the factory is as simple as employing the synchronized keyword in Java: it suffices to call it with a Serializable class, and it wraps for you the dependability, consistency and liveness guarantees of the instantiated object over multiple Infinispan servers. The factory is universal in the sense that it can instantiate an object of any (serializable) class atop an Infinispan cache, making transparently the object replicated and durable, while ensuring strong consistency despite concurrent access.

Basic Usage

Using the AtomicObjectFactory is fairly simple. We illustrate below a base use case. Additional examples are provided in the maven test directories.

AtomicObjectFactory factory = new AtomicObjectFactory(c1); // c1 is a cache
Set set = (Set) factory.getInstanceOf(HashSet.class, "k"); // k is the storage key
set.add("something"); // some call examples
System.out.println(set.toString())
set.addAll(set);
factory.disposeInstanceOf(HashSet.class, "set", true); // to persistently store the object

Limitations & Guarantees

The implementation requires that all the arguments of the methods of the object are Serializable, as well as the object itself. An object created by the factory is atomic provided that the cache which supports it is both synchronous and transactional.

Going Further

White Paper.
The factory is described in Section 4 of the paper titled "On the Support of Versioning in Distributed Key-Value Stores" published at the 33rd IEEE Symposium on Reliable Distributed Systems (SRDS'14). A preprint version of this paper is available at the following location.

High-level Implementation Details.
We built the factory on top of the transactional facility of Infinispan. In more details, when the object is created, we store both a local copy and a proxy registered as a cache listener. We serialize every call in a transaction consisting of a single put operation. When the call is de-serialized, it is applied to the local copy and, in case the calling process was local, the response value is returned.

Friday, 9 January 2015

Infinispan 7.1.0.Beta1

Dear Infinispan community,

We're proud to announce the first Beta release of Infinispan 7.1.0.

Infinispan brings the following major improvements:
  • Near-Cache support for Remote HotRod caches
  • Annotation-based generation of ProtoBuf serializers which removes the need to write the schema files by hand and greatly improves usability of Remote Queries
  • Cluster Listener Event Batching, which coalesces events for better performance
  • Cluster- and node-wide aggregated statistics
  • Vast improvements to the indexing performance
  • Support for domain mode and the security vault in the server
  • Further improvements to the Partition Handling with many stability fixes and the removal of the Unavailable mode: a cluster can now be either Available or Degraded.
Of course there's also the usual slew of bug fixes, performance and memory usage improvements and documentation cleanups.

Feel free to join us and shape the future releases on our forums, our mailing lists or our #infinispan IRC channel.

For a complete list of features and bug fixes included in this release please refer to the release notes. Visit our downloads section to find the latest release.

Thanks to everyone for their involvement and contribution!

Monday, 5 January 2015

Infinispan 7.0.3.Final released !

Dear community,

the new year brings a new release of the stable Infinispan branch. Infinispan 7.0.3.Final is a bug-fix release with a particular focus on partition handling stability. The release is a drop-in replacement for previous 7.0.x releases, however, be aware that we reverted org.infinispan.commons.utils.FileLookup to 6.0.x behaviour to ease upgrade for Hibernate 2nd-level cache and WildFly. Sorry about the breakage. Please consult the release notes for details.

Thanks to everyone involved in this release! 

Visit our downloads section to find the latest release.
If you have any questions please check our forums, our mailing lists or ping us directly on IRC.