NFSdb (www.nfsdb.org)

NFSdb is a low latency, high throughput time-series database written entirely in Java. We use memory-mapped files to bring you fully persisted database with performance characteristics of in-memory cache. The goal of this project is to make the fastest and most developer friendly database in the world.

###Maven

NFSdb requires minimum of Java 7 and stable release is available from maven Central:

        <dependency>
            <groupId>com.nfsdb</groupId>
            <artifactId>nfsdb-core</artifactId>
            <version>1.0.3</version>
        </dependency>

Getting started

Check out our [Quick-Start Guide] (http://www.nfsdb.org/quick-start/)

We also have a growing collection of examples:

[nfsdb-samples] (https://github.com/NFSdb/nfsdb/tree/master/nfsdb-samples) repository.

Performance

On test rig (Intel i7-920 @ 4Ghz) NFSdb shows average read latency of 20-30ns and write latency of 60ns per column of data. Read and write do not have any GC overhead.

License

NFSdb is available under [Apache 2.0 License] (http://www.apache.org/licenses/LICENSE-2.0.txt)

Support

NFSdb project is being actively developed and supported. You can raise and [Issue] (https://github.com/bluestreak01/nfsdb/issues) on github or join our [google group] (https://groups.google.com/forum/#!forum/nfsdb)

Please visit our official web site [www.nfsdb.org] (http://nfsdb.org).

Upcoming release Change Log

• NEW: Journal replication over network
• BREAKING: All strings are stored with length as 4-byte int. Journal would use more space but it reduces CPU overhead on reads and appends.
• BREAKING: SymbolIndex class is renamed to KVIndex. SymbolIndex.put() is replaced with KVIndex.add()
• IMPROVEMENT: Improved Index performance
• IMPROVEMENT: Improved append performance