About the Author

Greg Luck

Greg Luck

Chief Technical Officer

Greg Luck is a leading technology entrepreneur with more than 15 years of experience in high-performance in-memory computing. He is the founder and inventor of Ehcache, a widely used open source Java distributed cache that was acquired by Software AG (Terracotta) in 2009, where he served as CTO. Prior to that, Greg was the Chief Architect at Australian start-up Wotif.com that went public on the Australian Stock Exchange (ASX:WTF) in 2006. Greg is a current member of the Java Community Process (JCP) Executive Committee, and since 2007 has been the Specification Lead for JSR 107 (Java Specification Requests) JCACHE. Greg has a master's degree in Information Technology from Queensland University of Technology and a Bachelor of Commerce from the University of Queensland.

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Hazelcast IMDG 4.0 is Released

Greg Luck
by Greg Luck

I joined Hazelcast in January 2014 as employee number 12. At that time Hazelcast 3.1 was the current version. Since then, about every 7-8 months we have done a “minor” release, the latest of which is 3.12. Minor in the sense that they maintained binary compatibility. We added many features and improved many aspects of […]

Announcing the Hazelcast Community License

Greg Luck
by Greg Luck

Today, Hazelcast is moving to a three-license software licensing model:  Apache 2.0 for the core of our systems, consistent with our history A new source-available Hazelcast Community License A proprietary license for selected Enterprise operational features, consistent with our history The license model change will have no impact on users and is only intended to […]

Redis Load Handling vs Data Integrity: Tradeoffs in Distributed Data Store Design

Greg Luck
by Greg Luck

Introduction We all know that selecting the right technology for your business-critical systems is hard. You first have to decide what characteristics are most important to you, and then you need to identify the technologies that fit that profile. The problem is that you typically only get a superficial view of how technologies work, and […]

The One Beam to Rule Them All

Greg Luck
by Greg Luck

Unbounded, unordered, global-scale datasets are increasingly common in day-to-day business – IoT sensor network data streams, mobile usage statistics, large scale monitoring, the list is endless. Numerous applications seek the ability to quickly react to dynamic streaming data, as it is either a mandatory requirement or a competitive advantage. API Churn As a consequence, lots […]

Hazelcast Responds to Redis Labs’ Benchmark

Greg Luck
by Greg Luck

UPDATE (9/4/19): I posted a new blog that showcases how we believe Redis achieves the performance in its benchmarks. Due to its underlying architecture and many years of optimization, Hazelcast is extremely fast and dramatically outperforms Redis Labs (and Redis open source), especially at scale. Last year, Redis Labs published a very misleading benchmark against […]

Hazelcast’s View on Open Source

Greg Luck
by Greg Luck

Given the widely public reaction to the Commons Clause licensing change from another vendor, we felt it was important to let the community at large know that Hazelcast’s 10-year consistent stance on open-source licensing is not changing. In fact that was one of the first public questions posed by InfoQ to our new CEO, Kelly […]

Jepsen Analysis on Hazelcast 3.8.3

Greg Luck
by Greg Luck

Update: June 10, 2020 Updated a number of the links as content and documentation have changed. Update: March 6, 2019 Hazelcast 3.12 introduced a new CP Subsystem based on an In-Memory RAFT for the atomic data structures discussed in this blog. This is an ideal solution recommended by Kyle Kingsbury which we have now implemented. […]

Hazelcast Jet Now Available on Pivotal Cloud Foundry

Greg Luck
by Greg Luck

I am very excited to announce that after months of engineering work and assistance from Pivotal, Hazelcast Jet is now available as a Tile on Pivotal Cloud Foundry (PCF) – the first general purpose data processing platform available on PCF. As a member of the Cloud Foundry community we are determined to enhance the services […]

Hazelcast IMDG Faster than Redis and Extending its Lead

Greg Luck
by Greg Luck

We recently conducted a second performance benchmark between Redis 3.2.8 cluster and a Hazelcast IMDG 3.8 cluster, following on from an earlier benchmark we did last year against 3.0.7. Check out the benchmark. Hazelcast Faster In summary, when comparing get performance, Hazelcast IMDG was up to 56% faster than Redis. For set performance, the Hazelcast […]

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