[Doc] add hardware recommendations
@@ -63,30 +63,27 @@ For machines running a bookie and a Pulsar broker, more powerful machines are re
* Fast CPUs and 10Gbps [NIC](https://en.wikipedia.org/wiki/Network_interface_controller) (for Pulsar brokers)
* Small and fast [solid-state drives](https://en.wikipedia.org/wiki/Solid-state_drive) (SSDs) or [hard disk drives](https://en.wikipedia.org/wiki/Hard_disk_drive) (HDDs) with a [RAID](https://en.wikipedia.org/wiki/RAID) controller and a battery-backed write cache (for BookKeeper bookies)
+#### Hardware recommendations
+
To start a Pulsar instance, below are the minimum and the recommended hardware settings.
-1. The minimum hardware settings (250 Pulsar topics)
- - Broker
- - CPU: 0.2
- - Memory: 256MB
- - Bookie
- - CPU: 0.2
- - Memory: 256MB
- - Storage:
- - Journal: 8GB, PD-SSD
- - Ledger: 16GB, PD-STANDARD
-
-2. The recommended hardware settings (1000 Pulsar topics)
-
- - Broker
- - CPU: 8
- - Memory: 8GB
- - Bookie
- - CPU: 4
- - Memory: 8GB
- - Storage:
- - Journal: 256GB, PD-SSD
- - Ledger: 2TB, PD-STANDARD
+A cluster consists of 3 broker nodes, 3 bookie nodes, and 3 ZooKeeper nodes. The following recommendation is suitable for one node.
+
+- The minimum hardware settings (**250 Pulsar topics**)
+
+ Component | CPU|Memory|Storage|Throughput |Rate
+ |---|---|---|---|---|---
+ Broker|0.2|256 MB|/|Write throughput: 3 MB/s<br><br />Read throughput: 6 MB/s<br><br />|Write rate: 350 entries/s<br><br />Read rate: 650 entries/s
+ Bookie|0.2|256 MB|Journal: 8 GB<br><br />PD-SSDLedger: 16 GB, PD-STANDARD|Write throughput: 2 MB/s<br><br />Read throughput: 2 MB/s<br><br />|Write rate: 200 entries/s<br><br />Read rate: 200 entries/s
+ ZooKeeper|0.05|256 MB|Log: 8 GB, PD-SSD<br><br />Data: 2 GB, PD-STANDARD|/|/
+
+- The recommended hardware settings (**1000 Pulsar topics**)
+
+ Component | CPU|Memory|Storage|Throughput |Rate
+ |---|---|---|---|---|---
+ Broker|8|8 GB|/|Write throughput: 100 MB/s<br><br />Read throughput: 200 MB/s<br><br />|Write rate: 10,000 entries/s<br><br />Read rate: 20,000 entries/s
+ Bookie|4|8GB|Journal: 256 GB<br><br />PD-SSDLedger: 2 TB, PD-STANDARD|Write throughput: 75 MB/s<br><br />Read throughput: 75 MB/s<br><br />|Write rate: 7,500 entries/s<br><br />Read rate: 7,500 entries/s
+ ZooKeeper|1|2 GB|Log: 64 GB, PD-SSD<br><br />Data: 256 GB, PD-STANDARD|/|/
## Install the Pulsar binary package
