Merge pull request jhuangtw#58 from artemg/patch-1

Add Facebook LogDevice

README.md

@@ -16,7 +16,7 @@ See also: [System Design Primer](https://github.com/donnemartin/system-design-pr
 | Protocol Buffer   | [Protobuf](https://github.com/google/protobuf)    | [Cap'n Proto](https://capnproto.org/), [Thrift](https://github.com/apache/thrift), [Avro](https://github.com/apache/avro), [Amazon Ion](https://amzn.github.io/ion-docs/)    |
 | Stubby | [gRPC](https://github.com/grpc/grpc) | Bolt, [Thrift](https://github.com/apache/thrift) |
 | Chubby            |      | [Apache Zookeeper](https://github.com/apache/zookeeper), [etcd](https://github.com/coreos/etcd), [HashiCorp Consul](https://github.com/hashicorp/consul)      |
-| ? | | [Apache Kafka](https://github.com/apache/kafka), [Apache Pulsar](https://github.com/apache/incubator-pulsar) |
+| ? | | [Apache Kafka](https://github.com/apache/kafka), [Apache Pulsar](https://github.com/apache/incubator-pulsar, [Facebook LogDevice](https://github.com/facebookincubator/LogDevice) |
 
 
 ### Infrastructure