Hot-warm-cold architecture in Elasticsearch - Cheat Sheet & Quick Revision

Recall & Review

beginner

What is the Hot-warm-cold architecture in Elasticsearch?

It is a way to organize data nodes based on how often data is accessed: Hot nodes store recent, frequently accessed data; Warm nodes store older, less accessed data; Cold nodes store rarely accessed, long-term data.

beginner

Why use Hot nodes in Hot-warm-cold architecture?

Hot nodes handle new and frequently searched data. They have fast storage and more CPU to quickly index and search recent data.

intermediate

What type of hardware is typical for Cold nodes?

Cold nodes usually have slower, cheaper storage and less CPU because they store data that is rarely searched but must be kept for long-term.

intermediate

How does data move between Hot, Warm, and Cold nodes?

Data moves from Hot to Warm to Cold as it ages and is accessed less, helping save costs while keeping data available.

beginner

What is a key benefit of using Hot-warm-cold architecture?

It balances cost and performance by using expensive fast hardware for recent data and cheaper slower hardware for old data.

Which node type in Hot-warm-cold architecture stores the most recent data?

A Cold node

B Warm node

C Hot node

D Frozen node

Hot nodes store the newest and most frequently accessed data.

What is the main characteristic of Warm nodes?

A Store older data with moderate access on balanced hardware

B Store rarely accessed data on slow disks

C Store new data with fast CPUs

D Store data only in memory

Warm nodes hold older data that is accessed less often but still needs reasonable performance.

Why are Cold nodes typically cheaper in hardware?

A They do not store any data

B They use SSDs and high CPU

C They store only indexes

D They use slower disks and less CPU

Cold nodes use slower, cheaper storage and less CPU because data is rarely accessed.

What happens to data as it ages in Hot-warm-cold architecture?

A It moves from Cold to Warm to Hot nodes

B It moves from Hot to Warm to Cold nodes

C It stays only on Hot nodes

D It is deleted immediately

Data moves from Hot to Warm to Cold nodes as it becomes older and less accessed.

What is a main goal of Hot-warm-cold architecture?

A Balance cost and performance by tiering data storage

B Avoid using Cold nodes

C Store all data in memory

D Maximize storage cost by using only fast disks

The architecture balances cost and performance by using different hardware for different data ages.

Explain the Hot-warm-cold architecture and how it helps manage Elasticsearch data.

Think about how data changes over time and how hardware can match that.

Describe the hardware differences between Hot, Warm, and Cold nodes and why they matter.

Consider what kind of data each node handles and how often it is accessed.