TiFlash Deployment Topology

This document describes the deployment topology of TiFlash based 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	Configuration
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

Note:

The IP addresses of the instances are given as examples only. In your actual deployment, replace the IP addresses with your actual IP addresses.

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, see Topology Configuration File for Deploying TiDB Using TiUP.

Key parameters

• To enable the Placement Rules feature of PD, set the value of replication.enable-placement-rules in the configuration template to true.
• The instance level "-host" configuration in tiflash_servers only supports IP, not domain name.
• For detailed TiFlash parameter description, see TiFlash Configuration.

Note:

• You do not need to manually create the tidb user in the configuration file. The TiUP cluster component automatically creates the tidb user on the target machines. You can customize the user, or keep the user consistent with the control machine.
• If you configure the deployment directory as a relative path, the cluster will be deployed in the home directory of the user.