Compression (gzip, snappy, lz4) in Kafka - Interactive Code Practice

Practice - 5 Tasks

1fill in blank

easy

Complete the code to set the Kafka producer compression type to gzip.

Kafka

props.put("compression.type", "[1]");

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

Agzip

Bsnappy

Clz4

Dnone

Attempts:

3 left

💡 Hint

Common Mistakes

Using 'gz' instead of 'gzip' as the compression type.

Forgetting to put the compression type in quotes.

Setting compression.type to gzip enables gzip compression for Kafka producer messages.

2fill in blank

medium

Complete the code to configure the Kafka producer to compress messages with snappy.

Kafka

props.put("compression.type", "[1]");

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

Alz4

Bgzip

Cnone

Dsnappy

Attempts:

3 left

💡 Hint

Common Mistakes

Using 'snip' or 'snap' instead of 'snappy'.

Confusing compression.type with other Kafka properties.

Setting compression.type to snappy tells Kafka to use Snappy compression for messages.

3fill in blank

hard

Fix the error in the code to enable lz4 compression for Kafka producer.

Kafka

props.put("compression.type", "[1]");

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

Alz_4

Blz4

Clz-4

Dlzfour

Attempts:

3 left

💡 Hint

Common Mistakes

Using underscores or dashes in the compression type string.

Misspelling 'lz4' as 'lzfour'.

The correct string for LZ4 compression in Kafka is lz4. Other variants are invalid.

4fill in blank

hard

Fill both blanks to create a Kafka producer configuration that uses gzip compression and sets the batch size to 16384 bytes.

Kafka

props.put("compression.type", "[1]");
props.put("batch.size", [2]);

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

Agzip

Bsnappy

C16384

D32768

Attempts:

3 left

💡 Hint

Common Mistakes

Using batch size as a string instead of an integer.

Mixing compression types and batch sizes.

Setting compression.type to gzip enables gzip compression. The batch.size property controls the batch size in bytes, here set to 16384.

5fill in blank

hard

Fill all three blanks to create a Kafka producer configuration that uses lz4 compression, sets batch.size to 50000, and enables idempotence.

Kafka

props.put("compression.type", "[1]");
props.put("batch.size", [2]);
props.put("enable.idempotence", [3]);

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

Agzip

B50000

Ctrue

Dlz4

Attempts:

3 left

💡 Hint

Common Mistakes

Using numeric values as strings for batch.size.

Setting enable.idempotence to 'yes' or '1' instead of 'true'.

Using lz4 for compression, setting batch.size to 50000 bytes, and enabling idempotence with true configures the producer accordingly.

Practice

1. Which of the following compression types is NOT supported by Kafka by default?

easy

A. gzip

B. snappy

C. lz4

D. bzip2

Solution

1. Step 1: Recall Kafka's default compression types

   Kafka supports gzip, snappy, and lz4 compression types by default.

2. Step 2: Identify unsupported compression

   bzip2 is not included in Kafka's default compression options.

3. Final Answer:

   bzip2 -> Option D

4. Quick Check:

   Kafka default compression excludes bzip2 [OK]

Hint: Remember Kafka supports gzip, snappy, and lz4 only [OK]

Common Mistakes:

• Confusing bzip2 as supported compression
• Thinking all common compressions are supported
• Mixing compression codecs with serialization formats

2. Which is the correct way to set gzip compression in Kafka producer configuration?

easy

A. compression.type = 'gzip'

B. compressionType = 'gzip'

C. compression.type = gzip

D. compression = 'gzip'

Solution

1. Step 1: Identify the correct property name

   The Kafka producer config uses 'compression.type' to set compression.

2. Step 2: Check the correct value format

   The value should be a string, so 'gzip' must be in quotes.

3. Final Answer:

   compression.type = 'gzip' -> Option A

4. Quick Check:

   Use compression.type with string value [OK]

Hint: Use compression.type with quotes around value [OK]

Common Mistakes:

• Using wrong property name like compressionType
• Omitting quotes around 'gzip'
• Using compression instead of compression.type

3. Given this Kafka producer config snippet:

props.put("compression.type", "snappy");
props.put("acks", "all");

What is the effect of setting compression.type to snappy?

medium

A. Messages will be sent without compression.

B. Messages will be compressed using Snappy before sending.

C. Messages will be compressed using gzip.

D. Producer will throw an error due to invalid compression.

Solution

1. Step 1: Understand the compression.type setting

   Setting compression.type to 'snappy' means messages are compressed with Snappy codec.

2. Step 2: Confirm no errors expected

   Snappy is a valid compression type, so no errors occur and compression is applied.

3. Final Answer:

   Messages will be compressed using Snappy before sending. -> Option B

4. Quick Check:

   compression.type = snappy means Snappy compression [OK]

Hint: compression.type sets the codec used for message compression [OK]

Common Mistakes:

• Assuming no compression happens
• Confusing snappy with gzip
• Expecting an error for valid compression type

4. You wrote this Kafka producer config:

props.put("compression.type", "lz5");

What is the problem with this configuration?

medium

A. lz5 is not a supported compression type in Kafka.

B. The property name should be compressionType, not compression.type.

C. The value should be uppercase: LZ5.

D. There is no problem; this is valid.

Solution

1. Step 1: Check the compression type value

   Kafka supports gzip, snappy, and lz4 only; lz5 is invalid.

2. Step 2: Confirm property name correctness

   The property name compression.type is correct, so no issue there.

3. Final Answer:

   lz5 is not a supported compression type in Kafka. -> Option A

4. Quick Check:

   Only gzip, snappy, lz4 are valid compression types [OK]

Hint: Use only gzip, snappy, or lz4 for compression.type [OK]

Common Mistakes:

• Using unsupported compression types like lz5
• Changing property name incorrectly
• Assuming case sensitivity matters for compression type

5. You want to optimize Kafka message throughput by choosing a compression type that balances speed and compression ratio. Which compression type should you choose?

hard

A. gzip, because it has the best compression ratio but slower speed.

B. No compression, to avoid any overhead.

C. snappy, because it offers fast compression with reasonable compression ratio.

D. lz4, because it is the slowest but compresses best.

Solution

1. Step 1: Understand compression trade-offs

   gzip compresses well but is slower; snappy is faster with decent compression; lz4 is fast and efficient.

2. Step 2: Identify best balance for throughput

   snappy is known for fast compression speed and reasonable compression ratio, ideal for throughput.

3. Final Answer:

   snappy, because it offers fast compression with reasonable compression ratio. -> Option C

4. Quick Check:

   snappy balances speed and compression well [OK]

Hint: Pick snappy for speed and decent compression [OK]

Common Mistakes:

• Choosing gzip for speed instead of compression ratio
• Thinking lz4 is slowest
• Assuming no compression is fastest overall