Redis hard
Redis Streams utilize a specialized Radix Tree (rax). What is the primary data storage advantage of this structure over a standard Linked List?
- A It enables O(1) random access to any chronological message ID without performing a full tree traversal.
- B It uses Prefix Compression and integer delta-encoding to drastically reduce the total memory footprint.
- C It automatically offloads infrequently accessed message segments to an unlogged staging area on the local disk.
- D It encrypts every message payload using a session-specific key derived from the consumer group's UUID.
Answer: B. It uses Prefix Compression and integer delta-encoding to drastically reduce the total memory footprint.
Log data is often repetitive (e.g., repeated field names like 'sensor_val'). Radix trees store shared prefixes only once and compress the IDs. This allows Redis to store millions of entries in a fraction of the RAM of a standard list.
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