TiFlash部署拓扑结构

This document describes the deployment topology ofTiFlashbased on the minimal TiDB topology.

TiFlash is a columnar storage engine, and gradually becomes the standard cluster topology. It is suitable for real-time HTAP applications.

Topology information

Instance	Count	Physical machine configuration	IP	配置
TiDB	3	16 VCore 32GB * 1	10.0.1.7 10.0.1.8 10.0.1.9	Default port Global directory configuration
PD	3	4 VCore 8GB * 1	10.0.1.4 10.0.1.5 10.0.1.6	Default port Global directory configuration
TiKV	3	16 VCore 32GB 2TB (nvme ssd) * 1	10.0.1.1 10.0.1.2 10.0.1.3	Default port Global directory configuration
TiFlash	1	32 VCore 64 GB 2TB (nvme ssd) * 1	10.0.1.11	Default port Global directory configuration
Monitoring & Grafana	1	4 VCore 8GB * 1 500GB (ssd)	10.0.1.10	Default port Global directory configuration

Topology templates

• The simple template for the TiFlash topology
• The complex template for the TiFlash topology

For detailed descriptions of the configuration items in the above TiDB cluster topology file, seeTopology Configuration File for Deploying TiDB Using TiUP.

Key parameters

• To enable thePlacement Rulesfeature of PD, set the value ofreplication.enable-placement-rulesin the configuration template totrue.
• The instance level"-host"configuration intiflash_serversonly supports IP, not domain name.
• For detailed TiFlash parameter description, seeTiFlash Configuration.