dreml - Linux
Overview
dreml
is a modern, high-performance tool for streaming data processing, real-time analytics, and continuous learning. It offers a fast, flexible, and scalable solution for processing massive amounts of data in motion.
Syntax
dreml [options] <source> <sink> [processor]
Options/Flags
- -s, –source: The input data source (e.g., Kafka, S3, files)
- -t, –sink: The output data sink (e.g., Kafka, S3, HDFS)
- -p, –processor: The data processor to apply (e.g., filter, map, reduce)
- –parallelism: The level of parallelism to use (default: 1)
- –state-store: Path to the state store directory (e.g., RocksDB, Redis)
- –checkpoint-interval: Interval (in milliseconds) for checkpointing state (default: 30000)
- –help: Display help information
Examples
Streaming log processing:
dreml -s kafka -t s3 -p filter="level=ERROR"
Real-time fraud detection:
dreml -s kafka -t redis -p map="score=calculate_fraud_score(transaction)" -p filter="score>0.5"
Continuous learning:
dreml -s s3 -p train="model=train_classifier(data)" -t model-store -p serve="model=load_classifier(model-store)" -t kafka
Common Issues
- Out-of-memory errors: Increase the available memory for the JVM or adjust the parallelism level.
- Checkpointing failures: Ensure the
--state-store
directory has sufficient write permissions. - Slow processing: Optimize the data processors or increase the parallelism level.
Integration
- Use
dreml
as a data source or sink for other data processing tools like Spark, Hadoop, or Flink. - Create scripts or command chains that combine
dreml
with other commands for complex data processing tasks.
Related Commands
- Kafka
- Flink
- Spark
- Redis