Index settings (shards, replicas) in Elasticsearch - Interactive Code Practice

Practice - 5 Tasks

1fill in blank

easy

Complete the code to set the number of primary shards to 3.

Elasticsearch

{
  "settings": {
    "number_of_shards": [1]
  }
}

Drag options to blanks, or click blank then click option'

A5

B0

C1

D3

Attempts:

3 left

💡 Hint

Common Mistakes

Setting shards to 0 is invalid because an index must have at least one shard.

Choosing too many shards can cause overhead.

The number_of_shards setting controls how many primary shards the index has. Setting it to 3 means the index will be split into 3 parts.

2fill in blank

medium

Complete the code to set the number of replicas to 2.

Elasticsearch

{
  "settings": {
    "number_of_replicas": [1]
  }
}

Drag options to blanks, or click blank then click option'

A1

B2

C-1

D3

Attempts:

3 left

💡 Hint

Common Mistakes

Negative numbers are invalid for replicas.

Setting replicas too high wastes resources.

The number_of_replicas setting controls how many copies of each shard are kept for fault tolerance. Setting it to 2 means there will be two copies of each shard.

3fill in blank

hard

Fix the error in the code to correctly set shards to 1.

Elasticsearch

{
  "settings": {
    "number_of_shards": [1]
  }
}

Drag options to blanks, or click blank then click option'

A1

Bone

Ctrue

Dnull

Attempts:

3 left

💡 Hint

Common Mistakes

Using a string like "one" instead of a number.

Using boolean or null values.

The number_of_shards must be a number, not a string or other type. Using 1 as a number is correct.

4fill in blank

hard

Fill both blanks to set shards to 4 and replicas to 1.

Elasticsearch

{
  "settings": {
    "number_of_shards": [1],
    "number_of_replicas": [2]
  }
}

Drag options to blanks, or click blank then click option'

A4

B1

C3

D0

Attempts:

3 left

💡 Hint

Common Mistakes

Mixing up shards and replicas values.

Using zero for shards which is invalid.

Setting number_of_shards to 4 splits the index into 4 parts. Setting number_of_replicas to 1 keeps one copy of each shard for safety.

5fill in blank

hard

Fill all three blanks to set shards to 2, replicas to 0, and refresh interval to 1s.

Elasticsearch

{
  "settings": {
    "number_of_shards": [1],
    "number_of_replicas": [2],
    "refresh_interval": "[3]"
  }
}

Drag options to blanks, or click blank then click option'

A1

B0

C2

D1s

Attempts:

3 left

💡 Hint

Common Mistakes

Putting numbers in quotes for shards or replicas.

Using invalid refresh interval formats.

Setting number_of_shards to 2 splits the index into two parts. Setting number_of_replicas to 0 means no copies. The refresh_interval of "1s" means the index refreshes every second.