GCP - Cloud Firestore and Bigtable
Which of the following best describes the row key design for efficient time-series data retrieval in Bigtable?
Which of the following best describes the row key design for efficient time-series data retrieval in Bigtable?
easy📝 Conceptual Q2 of 15
Step-by-Step Solution
Solution:
Step 1: Understand row key impact on data access
Row keys determine how data is stored and retrieved. For time-series, sorting by device and time helps efficient queries.Step 2: Why reversed timestamp?
Reversing timestamp allows recent data to be stored close together, speeding up queries for latest data.Final Answer:
Use a device ID followed by a reversed timestamp -> Option CQuick Check:
Row key design = Device ID + reversed timestamp [OK]
Quick Trick: Reverse timestamp to get recent data quickly [OK]
Common Mistakes:
- Starting row key with timestamp causes hot-spotting
- Using random UUID breaks data locality
- Using only device ID limits time-based queries
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