10 Advantages of DBMS Over Traditional File Systems

Advantages of DBMS Over File System

In the pre-database days, organizations kept their data in flat files, or one file per department, one file per application, and sometimes one file per employee. It worked, as long as it worked; duplicate records everywhere, no security, no safe way for two people to edit the data, and a corrupted file taking critical data down with it.

For this reason, almost all serious applications today, ranging from banking systems to e-commerce stores, use the DBMS technology and overcome all these very problems. Let’s look at the advantages of a DBMS over a file-based storage and why they are important to your business.

DBMS vs. File System

The 10 Key Advantages of DBMS are as follows:

1. Minimal Data Redundancy

In a file system, every application maintains its own copies of data: A customer’s address can be in the sales file, in the billing file, and in the shipping file. It is stored only once in a DBMS. Fewer contradictions, less storage, one version of the truth.

2. Guaranteed Data Consistency

As redundancy is controlled, an update in one place is the update everywhere. The case where billing address is the same as the shipping address, but they are both different from the old address.

3. Controlled Concurrent Access

A DBMS enables hundreds of users to access the same data at the same time. A common risk with all shared files is that two users will update each other without any notice, but locking mechanisms and transaction isolation prevent this.

4. Robust Security

File systems provide a minimum of “who may open this file”. A DBMS offers authentication, granular permissions based on roles, encryption and audit trails. A support agent can view order status, but he or she never sees payment information.

5. Enforced Data Integrity

Rules are stored within the database: Primary keys prevent duplicates, foreign keys prevent orphan records and constraints block invalid data. Bad data is blocked before it enters, rather than cleaned up after.

6. Powerful, Fast Querying

Need to send all the customers who ordered two times last quarter but not this? In a file system, that’s a user-defined program. In a DBMS it is one SQL statement, and with indexing and query optimization, it is answered within milliseconds.

7. Atomic Transactions (ACID)

The money transfer can be from one account to another; never from one account. DBMS transactions ensure that the transactions that involve multiple steps either succeed or fail, with no partial success. There are no such guarantees in a file system.

8. Automated Backup and Recovery

Modern DBMS platforms will do scheduled backups and have transaction logs, allowing them to recover to a specific point in time. If it is a file, the recovery will be at the discretion of the last person who remembered to take a backup of the folder.

9. Data Abstraction and Independence

Applications request data from the DBMS without having to be aware of the physical location or manner in which the data is stored. Programs that read files cannot be reorganized, moved or upgraded without rewriting the program itself.

10. Systems Administration is Easier at Scale

Centralized management implies all the performance is to be monitored from one place, all security patches are to be applied from a single place, all users are to be managed from a single place and all standards are to be enforced from a single place. The more data there is, the more this benefit accumulates — particularly with 24/7 database monitoring.

Are there any Drawbacks to the Advantages?

Yes, of course — and it’s a good thing to know them. A DBMS also has licensing or hosting fees, needs some expertise in administration, and makes things more complicated than simply dropping data into a file. If you have a small, single-user data set, a spreadsheet could very well be all that you need.

However, for any business that processes customer information, transactions, or compliance requirements, the pros of the DBMS far outweigh the cons. And it’s not that you have to shoulder the burden of the administration: database managed services can be delivered by a professional at a lot lower cost than having a full-time in-house DBA.

What DBMS To Use?

While the benefits are universal, there are platform specific strengths as outlined above:

• Oracle Database — the enterprise standard for mission-critical, high-volume workloads.
• Microsoft SQL Server — offers a deep level of integration with the Microsoft ecosystem.
• MySQL / PostgreSQL — robust and open source with large support communities.
• MongoDB — a document database suitable for rapidly changing and flexible data (read our blog on the benefits of MongoDB).

An objective database consulting assessment can match the platform to your workload, budget, and growth plans.

Frequently Asked Questions

What is the greatest benefit of a DBMS over a file system?

Centralized, controlled data. All other issues of reduced redundancy, consistency, security, concurrent access, and recovery are consequences of having one governed system managing all data rather than independent files.

Why is DBMS more secure than file storage?

A DBMS can identify each user, limit access by role to columns and rows, encrypt data, and keep track of all actions. Typically, a file system only regulates who can access an entire file.

Does a small business need a DBMS?

Yes, if you’re keeping customer data, handling orders or require consistent reporting. The benefits of DBMS technology can be obtained without the enterprise budget, with open-source and cloud-hosted databases.

Am I able to move from file storage to DBMS?

Yes, it’s a standard upgrade. It includes creating a schema, cleaning up the data and migrating it gradually which is part of our data migration strategy guide.

Put These Advantages to Work with RalanTech

Choosing a DBMS is step one; running it securely and at peak performance is the ongoing challenge. RalanTech provides database consulting, health checks, performance tuning, and 24/7 managed support across Oracle, SQL Server, MySQL, PostgreSQL, Sybase, and Informix.

Get a free consultation or call +1 813-600-3297 — and let your database deliver every advantage it was built for.