ci skip: Update README.md

README.md

@@ -12,7 +12,7 @@ A library built on top of [spindle](https://github.com/flowerinthenight/spindle)
 At the moment, **hedge** is heavily used in [Alphaus](https://www.alphaus.cloud/) production with services that scale from single digit pods to hundreds.
 
 ## Why?
-First, I wanted a cluster coordinator that can work within k8s Deployments as a library, not as an external service (like [ZooKeeper](https://zookeeper.apache.org/)). So far, our efforts in making [Raft](https://raft.github.io/) play well with bursty, frequently scaling up/down deployments as a library is not that reliable yet (though we have an ongoing multi-[Paxos](https://en.wikipedia.org/wiki/Paxos_(computer_science))-based experiment [here](https://github.com/alphauslabs/juno) as well). I also wanted an easily-accessible storage that is a bit decoupled from the code (easier to query, edit, debug, backup, etc). We are already a heavy Spanner user, and spindle has been in our production for many years now: these two should be able to do it; StatefulSets or DaemonSets shouldn't be a requirement. Since then, additional features have been added, such as the `Send()` API.
+First, I wanted a cluster coordinator that can work within k8s Deployments as a library, not as an external service (like [ZooKeeper](https://zookeeper.apache.org/), [etcd](https://etcd.io/)). So far, our efforts in making [Raft](https://raft.github.io/) play well with bursty, frequently scaling up/down deployments as a library is not that reliable yet (though we have an ongoing multi-[Paxos](https://en.wikipedia.org/wiki/Paxos_(computer_science))-based experiment [here](https://github.com/alphauslabs/juno) as well). I also wanted an easily-accessible storage that is a bit decoupled from the code (easier to query, edit, debug, backup, etc). We are already a heavy Spanner user, and spindle has been in our production for many years now: these two should be able to do it; StatefulSets or DaemonSets shouldn't be a requirement. Since then, additional features have been added, such as the `Send()` API.
 
 ## What does it do?
 Leader election is handled by [spindle](https://github.com/flowerinthenight/spindle). Two APIs are provided for storage: `Put()` and `Get()`. All pods can serve the `Get()` calls, while only the leader handles the `Put()` API. If a non-leader pod calls `Put()`, that call is forwarded to the leader, who will do the actual write. All `Put()`'s are append-only.
@@ -23,7 +23,7 @@ A `Send()` API is also provided for members to be able to send simple request/re
 
 A `Broadcast()` API is also available for all pods. Note that due to the nature of k8s deployments (pods come and go) and the internal heartbeat delays, some pods might not receive the broadcast message at call time, although all pods will have the complete broadcast target list eventually. Hedge uses a combination of heartbeats and broadcasts to propagate member information to all pods; non-leaders send liveness heartbeats to the leader while the leader broadcasts active members to all pods. A streaming equivalent (gRPC) is also available.
 
-An experimental spill-over store (**SoS**) is also supported. It's currently used in bursty, quick load-process-discard type of data processing. An **SoS** in hedge is simply a combined memory area and a disk area between pods. For example, a pod can define an SoS of 1GB memory and 1GB disk. If there are 100 pods running under hedge, that's a combined storage of (1GB + 1GB) * 100. During reads and writes, hedge handles the data distribution and assembly between local RAM, disk, and between pods. It uses [Arrow](https://arrow.apache.org/) and memory mapped files as backing stores.
+An experimental spill-over store (**SoS**) is also supported. It's currently used in bursty, quick load-process-discard type of data processing. A **SoS** in hedge is simply a combined memory area and a disk area between pods. For example, a pod can define a SoS of 1GB memory and 1GB disk. If there are 100 pods running under hedge, that's a combined storage of (1GB + 1GB) * 100. During writes and subsequent reads, hedge handles the data distribution and assembly between local RAM, disk, and between pods. It uses [Arrow](https://arrow.apache.org/) and memory mapped files as backing stores.
 
 Finally, a distributed semaphore is also provided through the `NewSemaphore()`, `[Try]Acquire()`, and `Release()` APIs.