Do TiKV and PD support quorum nodes? Only vote for unsynchronized data

Note:
This topic has been translated from a Chinese forum by GPT and might contain errors.

Original topic: TiKV和PD支持仲裁节点吗?只投票选举不同步数据

| username: TiDBer_i3pbMJ65

【TiDB Usage Environment】Production Environment / Testing / PoC
【TiDB Version】
【Reproduction Path】What operations were performed when the issue occurred
【Encountered Issue: Issue Phenomenon and Impact】
【Resource Configuration】
【Attachments: Screenshots / Logs / Monitoring】

| username: 像风一样的男子 | Original post link

Wasting resources is shameful.

| username: Kongdom | Original post link

:yum: Expel all the replicas?

| username: Fly-bird | Original post link

No more replicas, please.

| username: Jolyne | Original post link

It feels redundant.

| username: 大飞哥online | Original post link

PD and TiKV do not support arbiter nodes; all nodes need to participate in the data synchronization and election process.

| username: Kongdom | Original post link

What is the significance of the arbitration node mechanism? It feels like a bit of a waste of hardware.

| username: TiDBer_小阿飞 | Original post link

What needs to be arbitrated? What is the purpose of arbitration? To determine whether the elected leader is legitimate?

| username: TiDBer_i3pbMJ65 | Original post link

The arbitration node mainly addresses the scenario of a single cluster across two AZs. The official two-AZ solution involves 6 replicas: 1. The number of replicas is too many; 2. Professional tools are needed to resolve issues when the primary AZ fails; 3. The various modes such as synchronous mode, semi-synchronous mode, and recovery to synchronous mode are too complex.

| username: 像风一样的男子 | Original post link

The enterprise edition will provide the AZ switching solution.

| username: TiDBer_i3pbMJ65 | Original post link

Do you have any related materials that you can share?

| username: 像风一样的男子 | Original post link

No, I’m not an enterprise edition user either, they won’t let me use it for free.

| username: Kongdom | Original post link

I didn’t see a similar solution in the enterprise edition, mainly for 7x24 service.