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| Apache DistributedLog graduated from Apache Incubator and is a sub-project of Apache BookKeeper now! |
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| A <strong>high-throughput</strong>, <strong>low-latency</strong> replicated log service, offering <strong>durability</strong>, <strong>replication</strong> and <strong>strong consistency</strong> as essentials for building reliable <strong>real-time</strong> applications. |
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| High Performance |
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| DL is able to provide <strong>milliseconds</strong> latency on <strong>durable</strong> writes with a large number |
| of concurrent logs, and handle high volume reads and writes per second from |
| thousands of clients. |
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| Durable and Consistent |
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| Messages are persisted on disk and replicated to store multiple copies to |
| prevent data loss. They are guaranteed to be consistent among writers and |
| readers in terms of <strong>strict ordering</strong>. |
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| Efficient Fan-in and Fan-out |
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| <p> |
| DL provides an efficient service layer that is optimized for running in a multi- |
| tenant datacenter environment such as <i>Mesos</i> or <i>Yarn</i>. The service layer is able |
| to support large scale writes (fan-in) and reads (fan-out). |
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| Various Workloads |
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| DL supports various workloads from <strong>latency-sensitive</strong> online transaction |
| processing (OLTP) applications (e.g. WAL for distributed database and in-memory |
| replicated state machines), real-time stream ingestion and computing, to |
| analytical processing. |
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| Multi Tenant |
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| To support a large number of logs for multi-tenants, DL is designed for I/O |
| isolation in real-world workloads. |
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| Layered Architecture |
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| </h3> |
| <p> |
| DL has a modern layered architecture design, which separates the <strong>stateless |
| service tier</strong> from the <strong>stateful storage tier</strong>. To support large scale writes (fan- |
| in) and reads (fan-out), DL allows scaling storage independent of scaling CPU |
| and memory. |
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| <h3>Blog</h3> |
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| |
| <a class="list-group-item" href="/releases/2017/04/25/the-first-release.html">Apr 25, 2017 - The first release of Apache DistributedLog</a> |
| |
| <a class="list-group-item" href="/technical-review/2016/09/19/kafka-vs-distributedlog.html">Sep 19, 2016 - A Technical Review of Kafka and DistributedLog</a> |
| |
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| <a class="twitter-timeline" href="https://twitter.com/distributedlog">Tweets by @DistributedLog</a> <script async="" src="//platform.twitter.com/widgets.js" charset="utf-8"></script> |
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| <p>Apache DistributedLog is available under <a href="http://www.apache.org/licenses/LICENSE-2.0">Apache License, version 2.0</a>.</p> |
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