ALIBABA · objective · 22% of the exam
Real-time Processing
Exam objectives are the official skill domains Data Engineer (Associate) tests. Below are the official ALIBABA docs our questions on this objective cite — review them, then practise.
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Official references for this objective
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Alibabacloud — Compare Flink SQL and DataStream API: Comprehensive Guide for New Developers - Alibaba Cloud Community
Flink automatically retains state data for 30 MINUTE + 15 MINUTE = 45 minutes. Outdated state beyond this interval is automatically cleaned.
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Alibabacloud — Apache Flink Fundamentals: State Management and Fault Tolerance - Alibaba Cloud Community
The two /api/a Nginx logs have the same input but different outputs
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Alibabacloud — How to use the streaming data tunnel service - MaxCompute - Alibaba Cloud Documentation Center
Concurrency High concurrency supported; no partition locking contention Concurrent writes can cause partition locking conflicts Write throughput Optimized for high QPS; prevents small-file fragmentation
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Alibabacloud — Understanding Batch Processing vs Stream Processing: Key Differences and Applications - Alibaba Cloud Community
Stream processing has almost no delay, offering real-time results.
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Alibabacloud — How to stream data on MaxCompute - MaxCompute - Alibaba Cloud Documentation Center
Data is available for processing within seconds and is protected even if the source server fails.
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Alibabacloud — What is Apache Flink ？ - Alibaba Cloud Community
Spark Streaming provides a micro-batch processing model, which is not as low-latency as Flink's true streaming approach.