Introduction to Batch and Stream Processing
In today's Big Data landscape, developers must analyze terabytes and even petabytes of data in any given period. Data attracts more data(like metadata). This gives us several advantages, yet it can be perplexing sometimes to know the desirable way to speed up and accelerate these technologies, especially when quick reactions are necessary to meet business requirements. For cloud-native corporations, an intriguing question is how to apply batch and stream processing efficiently in their use case.
What is Batch and Stream Processing?
Batch processing is designed to be a completely automated process without human intervention that runs high-volume, repetitive data jobs and
Stream processing is a data management technology that processes continuous data flow from sources.
Batch Processing
Batch processing is the processing of transactions in a group or batch. Once execution is underway, no user interaction is required. This differentiates execution from transaction processing, which involves processing transactions one at a time and requires user interaction.
What is the need for batch processing?
Needs for Batch processing are:
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Performance improvement
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A certain quantity of knowledge is often processed during a batch.
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Jobs can be executed in parallel/in multiple.
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Recovery in case of an abnormality Jobs can be re-executed (manual/schedule).
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When reprocessing, it's possible to process only unprocessed records by skipping processed records.
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Various activation methods for running jobs
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Synchronous execution is possible.
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Asynchronous execution is possible.
- DB polling and HTTP requests are often used as opportunities for execution.
Stream Processing
Stream processing is used to process continuous data streams in real-time without using a data store to persist the data. Analysts can continuously monitor the streaming data to monitor a stream of data to achieve different results or perform analytics to provide Data Visualization to help improve businesses.
What is the need for stream processing?
Needs for Stream processing are:
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Keep the data flowing: A real-time processing engine processes messages in-stream without any requirement to store them to perform any operation or sequence of operations.
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Process and respond instantaneously: Stream processing engines must have a highly optimised and minimal overhead execution capability to deliver a real-time result for high-volume applications.
What is the difference between stream and batch processing?
The differences between Stream processing and Batch processing are highlighted below:
Speed
Batch Processing processes massive data simultaneously, whereas Stream Processing processes streaming data in real time.
Hardware
Batch processing is mainly used while dealing with vast amounts of data not deliverable in streams. Meanwhile, stream processing is used for real-time data analysis, such as sensors and fraud-detecting devices.
Performance
Batch Processing requires longer processing data, whereas Stream processing requires only a few milliseconds.
Data set
Batch Processing processes finite data of known size, whereas Stream Processing processes streaming data of unknown size and infinite quantity.
Batch Processing processes data in multiple passes, whereas Stream Processing processes data in a few passes. The input graph is static in Batch Processing and dynamic in Stream Processing.
Analysis
Batch Processing analyzes data on a snapshot, whereas Stream Processing analyzes data continuously.
Batch Processing responds to job completion, whereas Stream Processing responds immediately.
What are the applications of Batch Processing and Stream Processing?
The applications of Batch Processing and Stream Processing are mentioned below.
Application of Batch Processing
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Batch processing handles large amounts of non-continuous data to minimize/eliminate the need for user interaction and improve job processing efficiency.
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Batch processing can be ideal for managing database updates and transactions and converting files from one format to another.
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Batch processing can be used when running complex algorithms against large datasets.
Application of Stream Processing
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Stream processing is most effective in algorithmic trading and stock market surveillance, computer system and network monitoring and wildlife tracking, predictive maintenance, intelligent devices, and intelligent patient care applications.
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Sensors in industrial equipment, vehicles, farm machinery, etc., send streaming data to an application that monitors the device's performance or detects and helps fix any potential defects to prevent equipment downtime.
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We track data from consumers' mobile devices to make real-time property recommendations based on geo-location.
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Video game digital distribution services like Steam, Ubisoft, etc., collect streaming data like user-gaming preferences and analyze these data in real-time to offer discounts for in-game purchases or offers on other games and other dynamic experiences to engage its players.
Scenarios where batch and stream processing are both used
Batch and Stream Processing can be used in scenarios where we need new data, but not necessarily in real-time. This means we don't have to wait an hour or a day for the data to be processed. Also, we don't need to know every second of the data analysis. One such scenario can be web analytics. Data analysts will immediately monitor how this affects user behaviour if a renowned eCommerce site changes its user interface. This is because a drop in conversion rates can lead to significant sales loss. In this case, a day's delay is too long, and a minute's delay is not an issue.
What are the use cases of batch processing and stream processing?
The use cases of batch processing and stream processing are described below:
The use cases of Batch Processing
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We use Batch processing when the data size is known and fixed. It takes a little longer to process the data. It requires dedicated staff to handle the issues.
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Batch processing processes data in several passes.
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After the data is collected over time and similar data are batched/grouped, batch processing is used.
The use cases of Stream Processing
Stream processing is used when the data size is variable and continuous, where it takes a few seconds/milliseconds to process data. The stream processor processes data in a few passes. It is used when a data stream requires an immediate response.
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Log-Analysis:- Stream Processing can be used to analyze real-time logs to gain insights. Cloud watch logs can be streamed using lambda and kinesis to gather information about EC2 clusters, Beanstalk applications, or Docker Containers deployed in ECS.
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Fraud Detection:- Processing of streaming transaction data can help us detect anomalies to identify and stop fraudulent transactions in real time.
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IoT:- Telemetry data coming from sensors, PLC(Programmable Logic Controllers), etc., can be processed using ML/DL algorithms to generate real-time analysis, to use with automation applications, or to monitor environmental changes.
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Other applications include Online adverts and Database Migrations.
What are the limitations of Batch processing and Stream processing?
The limitations of batch processing are:
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Debugging a Batch Processing system is difficult as it requires a team of professionals dedicated only to fixing the error. Training for this system is expensive as one needs to understand batch scheduling, notification, triggering, etc.
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Each batch can be subject to meticulous quality control and assurances, potentially causing increased team member downtime.
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Processing large batches of data requires massive storage and processing resources, leading to increased costs when scaling up.
The limitations of stream processing:
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Data input and output rate can create a problem in Stream Processing because it must cope with enormous amounts of data and respond immediately.
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The biggest challenge that organizations face in stream processing is that the rate of long-term data release should be faster or faster than the rate of long-term data entry; otherwise, the system will start to have problems with storage and memory.
There is no universally superior method in data processing as Batch and stream processing have strengths and weaknesses, depending on your applications. Corporations hold to glide in the direction of stream processing to stay agile. However, batch processing is widely used and may be used so long as legacy structures remain a vital component of the data ecosystem. Flexibility is a significant factor in data processing. As different projects call for different approaches, developers must be able to find optimal solutions for each use case. There is no clear winner between stream and batch processing. Teams that can work with both win.
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