What is the relationship between a machine room (zone) and a data center (dc)?

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

Original topic: 机房 (zone) 和 数据中心 (dc) 是什么关系?

| username: 江湖故人

Shouldn’t a data center include a server room?
Why is the topology in the documentation as follows: server room (zone) → data center (dc) → rack → host

| username: Fly-bird | Original post link

Data Center - Region: Beijing, Shanghai
Data Center - Same City: Shanghai 1, Shanghai 2

| username: Jellybean | Original post link

It is a bit unclear here. Translating “zone” as “region” or “area” would be more appropriate than “data center,” as it is generally used to indicate an availability zone.

Label is actually a logical representation that users can set arbitrarily. They can be set as ABCD or anything else, as long as they match the actual hierarchical deployment. However, for ease of management, we usually refer to the format in the official documentation.

| username: ShawnYan | Original post link

Zone should be translated as region or availability zone.

Sharp eyes, thank you for the suggestion on the documentation.

| username: tidb菜鸟一只 | Original post link

Regarding the translation issue, actually, “zone” roughly means region, “dc” is data center, “rack” is rack, and “host” is host. For example, if you use a physical machine, the storage order is basically Beijing → Data Center One → a certain rack → a certain machine.

| username: dba远航 | Original post link

A machine room (zone) is a physical concept, but this translation is not very reasonable. A data center (dc) is a logical concept.

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

Good observation, this should be a translation issue. “Zone” should be “region”.

| username: ShawnYan | Original post link

There is a historical issue here. In the old version, there was no dc, so it was directly written as machine room, rack, and machine.

| username: WinterLiu | Original post link

My personal understanding is that the concepts in TiDB are mainly used for sharding and grouping servers, and for locating regions. These are relative concepts. In reality, a zone should refer to the area where a data center is located, such as those divided by some cloud platforms like North China, South China, East China, etc.

| username: Soysauce520 | Original post link

As long as you understand the level, it should be the region.

| username: forever | Original post link

A single data center with multiple data centers in one facility, right?

| username: zhanggame1 | Original post link

Zone refers to a region, specifically the two locations in the “two locations, three centers” setup.

| username: Kongdom | Original post link

:yum: Immediately posted in the suggestion section to request a fix

| username: wangccsy | Original post link

Data centers may be distributed across multiple facilities, and similarly, a single facility may contain content from multiple data centers (not sure if my understanding is accurate).

| username: TiDBer_iLonNMYE | Original post link

Region → Data Center (dc) → Zone (or called LDC) → Rack → Host

| username: 这里介绍不了我 | Original post link

Indeed, the original documentation is somewhat ambiguous.

| username: 双开门变频冰箱 | Original post link

Zone refers to a region, right?

| username: xingzhenxiang | Original post link

Isn’t zone a region?

| username: xingzhenxiang | Original post link

This is the label configuration from the official documentation:
replication.location-labels: [“dc”, “zone”, “rack”, “host”]

| username: TiDBer_小阿飞 | Original post link

There’s no problem with this, right?
Machine room refers to the entire machine room – certain rows or columns within the machine room are divided into data centers – a certain rack in the data center – a certain U on the rack.