Characteristics of OLTP
In a data model, a transaction must have atomicity, consistency, isolation, and durability. Some of the characteristics for an effective transaction are as follows:
Fast Response Time: OLTP generally works upon client-server type of systems in which a user requests for some operation such as to check the account balance at an ATM. These systems are fast and efficient enough to slow down the response time; users do not have to wait for a long time to get response for their request.
Large Number of Users: OLTP systems can work with massive a number of users processing for the same data at the same time, for example multiple persons trying to reserve train tickets using the same website. Consistency implies that the record must be accurate both before and after a transaction is completed.
Process Multiple Transactions: Online transaction processing systems are capable enough to execute multiple transactions in fraction of seconds. OLTP deals with multiple transactions such as read or manipulate to be carried out on small data sets.
Compatible with ACID Properties: Atomicity, consistent, isolation and durability are major properties of a transaction. Atomicity implies a transaction must be accurate in the terms that it should be fully executed or fully fail, no intermediate state occurs. Consistency implies that the record must be accurate both before and after a transaction is completed. Isolation defines that no transaction will affect the presence of any other transaction within a system. The database should be durable enough to store all updates even after the system fails. The OLTP systems must ensure these properties while processing data online.
High Availability: OLTP systems process large number of transactions simultaneously, so any sort of data loss may cause major consequences. This problem can be resolved by taking backup of complete data on secondary storage.
OLTP in Business
The OLTP systems are commonly developed for accomplishing certain objectives for business enterprises. The business strategy deals with the problems that affect the performance of an organization; strategy in OLTP is usually developed by the higher level management. OLTP business processes include various task operations that are performed to achieve the goal of an enterprise. Database in the OLTP system can store series of information about business products, order transactions, customers and their staff. Various processes separate data from sources to apply transformations on them and then load the processed data into data warehouse. After that the processed data stored in data warehouse will be used in decision-making and analyzing the business growth.
Benefits and Challenges of OLTP
There are many useful features for the OLTP in modern era. However, data security and other administrative risks are some of the challenges facing by OLTP. The reasons behind the emergence of the OLTP technology are as follows:
Relational database is used by the OLTP system which is capable of handling huge number of users concurrently, process frequent requests and can perform multiple manipulations in microseconds.
OLTP provides proficiency in business models by modifying all transactions regularly and by reducing the response time for customers.
Simple instructions such as read, insert, update or delete are used to access or modify any sort of data in huge database using OLTP.
OLTP systems are also capable of keeping a large number of records in various fields such as sales or inventory control systems, health records, tickets reservation records etc. with accuracy.
The problems affecting the OLTP transaction due to the software and hardware problems are as follows:
The OLTP system allows multiple users to access and modify data concurrently which may cause loss of crucial data. Much precise concurrency control algorithms are required to resolve such sort of problems.
Online transactions get rigorously affected if any hardware unit of an OLTP system fails.
Due to regular online transactions, database becomes more prone to intruders; it may cause loss of confidential data.
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