Disk I/O optimization in Kafka - Interactive Code Practice

Practice - 5 Tasks

1fill in blank

easy

Complete the code to set the log segment size to 1 GB for better disk I/O performance.

Kafka

props.put("log.segment.bytes", [1]);

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

A2048

B1048576

C512000

D1073741824

Attempts:

3 left

💡 Hint

Common Mistakes

Using 1048576 which is 1 MB instead of 1 GB.

Using too small values causing frequent segment rollovers.

The log segment size is set in bytes. 1 GB equals 1073741824 bytes, which helps optimize disk I/O by reducing segment rollover frequency.

2fill in blank

medium

Complete the code to enable log preallocation to improve disk write performance.

Kafka

props.put("log.preallocate", [1]);

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

A"false"

B"true"

C"auto"

D"enabled"

Attempts:

3 left

💡 Hint

Common Mistakes

Using "false" disables preallocation, reducing performance benefits.

Using invalid strings like "auto" or "enabled" which are not accepted.

Setting log.preallocate to "true" enables preallocation of log files, which can reduce disk fragmentation and improve write performance.

3fill in blank

hard

Fix the error in the code to correctly configure the flush interval to 5000 milliseconds.

Kafka

props.put("log.flush.interval.ms", [1]);

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

A5000

B5

C"5000"

D"five thousand"

Attempts:

3 left

💡 Hint

Common Mistakes

Using an integer without quotes causes a type error.

Using words instead of numeric strings.

The value for log.flush.interval.ms must be a string representing the number of milliseconds. So it should be "5000" with quotes.

4fill in blank

hard

Fill both blanks to create a dictionary comprehension that sets log retention to 7 days and segment bytes to 1 GB.

Kafka

config = {"log.retention.hours": [1], "log.segment.bytes": [2]

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

A"168"

B"604800000"

C1073741824

D168

Attempts:

3 left

💡 Hint

Common Mistakes

Using retention as integer instead of string.

Using incorrect byte size for segment bytes.

Retention is set in hours as a string "168" (7 days * 24 hours). Segment bytes is set as integer 1073741824 (1 GB).

5fill in blank

hard

Fill all three blanks to create a dictionary comprehension that sets flush interval to 1000 ms, enables preallocation, and sets segment bytes to 512 MB.

Kafka

config = {"log.flush.interval.ms": [1], "log.preallocate": [2], "log.segment.bytes": [3]

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

A"1000"

B"true"

C536870912

D1000

Attempts:

3 left

💡 Hint

Common Mistakes

Using integer 1000 instead of string "1000" for flush interval.

Using "false" instead of "true" for preallocation.

Incorrect byte size for 512 MB.

The flush interval must be a string "1000" ms, preallocation enabled with string "true", and segment bytes set to 512 MB (536870912 bytes).