What is the key difference between strong and weak copyleft licenses?

What is the key difference between strong and weak copyleft licenses?

Both strong and weak copyleft licenses are persistent, but only strong copyleft licenses have a viral effect. In practice, this means that works licensed under weak copyleft licenses can be included in an aggregate work that is licensed using a different license.

What is weak copyleft?

Thus, the term “weak copyleft” refers to licenses where not all derived works inherit the copyleft license; whether a derived work inherits or not often depends on how it was derived. “Weak copyleft” licenses are often used to create software libraries.

What is meant by copyleft?

Copyleft is a general method for making a program (or other work) free (in the sense of freedom, not “zero price”), and requiring all modified and extended versions of the program to be free as well. So instead of putting GNU software in the public domain, we “copyleft” it.

What does GNU GPL stand for?

General Public License

Is AGPL a copyleft?

The AGPL V3 license is a strong copyleft license that enforces open source on all components derived from any previous work. It closes the server-side loophole, where the source code isn’t made available if the software isn’t released.

Is copyleft same as open source?

Copyleft is a subset of open source. Both open source and copyleft allow for source code to be modified and distributed. However, the difference is that with copyleft, the modified product must be distributed with the same copyleft license attached to the original software.

Is AGPL compatible with GPL?

We recommend that developers consider using the GNU AGPL for any software which will commonly be run over a network. Please note that the GNU AGPL is not compatible with GPLv2. This is a free software license, compatible with version 3 of the GNU GPL.

Can I use AGPL in commercial software?

AGPL is a fairly new license that was meant to go GPL-over-networks. If we follow the comments it turns out that you can use AGPL libraries with your closed-source, commercial server-side software, as long as you don’t modify the library.

Is MongoDB free for commercial use?

Yes, MongoDB is licensed under Free Software Foundation’s GNU AGPL v3. 0. Practically, this means that enhancements you make to MongoDB must be released to the community. As a consequence, you don’t need to be concerned with the licensing of MongoDB to build your app around it.

Can I sell software that uses GPL?

Can you sell GPL software/code? Yes, the GPL license allows users to sell the original as well as the modified software. However, if someone buys your program for a fee, GPL gives him/her the liberty to release it to the public, with or without a fee.

What is AGPL?

Our goal with using AGPL is to preserve the concept of copyleft with MongoDB. With traditional GPL, copyleft was associated with the concept of distribution of software. The problem is that nowadays, distribution of software is rare: things tend to run in the cloud.

How is MongoDB license?

Yes, MongoDB supported drivers and connectors such as the MongoDB Connector for Apache Spark are licensed under the Apache License v2. 0. All versions of MongoDB Community Server released prior to October 16, 2018 will continue to be licensed under the Free Software Foundation’s GNU AGPL v3.

What is Sspl license?

The Server Side Public License (SSPL) is an source-available software license developed by MongoDB Inc., and introduced in 2018.

How much does MongoDB cost?

MongoDB Atlas offers a perpetual free tier and usage-based pricing for as little as $9/mo for a shared instance or $60/mo dedicated.

How does MongoDB earn money?

In the prospectus, the story is that Mongo makes its money through subscriptions. But in the brochure, Mongo lists the value of the software license as $0 — the license cost is “captured under” Software Support and Maintenance. Since 2015 revenue has grown 250%, while “Cost of revenue” has grown only 60.7%.

Is MongoDB open source?

MongoDB is an open-source NoSQL database. There are two editions of MongoDB. One is MongoDB Open Source, and this edition is freely available as part of open source community, but for a while other edition, you need to pay for the license.

Which is the best open source database?

Top Open Source Databases

• MySQL remains on top as the #1 free and open source database, representing over 30% of open source database use.
• PostgreSQL came in 2nd place with 13.4% representation from open source database users, closely followed by MongoDB at 12.2% in 3rd place.

Why you should never use MongoDB?

But if there’s value in the links between documents, then you don’t actually have documents. MongoDB is not the right solution for you. It’s certainly not the right solution for social data, where links between documents are actually the most critical data in the system. So social data isn’t document-oriented.

Is MongoDB for free?

MongoDB offers a Community version of its powerful distributed document database. With this free and open database, download the MongoDB server to secure and encrypt your data and gain access to an advanced in-memory storage engine.

Why is MongoDB so expensive?

It offers more enhanced features than the other database platforms for which it required more resources This is one primary reason for its being more expensive than the customary MYSQL database. It can be run on a cloud server. The benefits of using MangoDB are many.

Is MongoDB free for students?

Students choosing to take advantage of the MongoDB Pack offering will receive $200 in MongoDB Atlas credit and free access to the MongoDB University On-Demand training catalog of courses. We’re incredibly proud to partner with GitHub and the GitHub Education team to make these benefits available.

Is PostgreSQL free to use?

Q: How is PostgreSQL licenced? A: PostgreSQL is released under the OSI-approved PostgreSQL Licence. There is no fee, even for use in commercial software products.

Is MySQL better than PostgreSQL?

The Critical Differences of Postgres vs MySQL: Most developers will tell you that MySQL is better for websites and online transactions, and PostgreSQL is better for large and complicated analytical processes.

Which is better MongoDB or PostgreSQL?

Both databases are awesome. If you are looking for a distributed database for modern transactional and analytical applications that are working with rapidly changing, multi-structured data, then MongoDB is the way to go. If a SQL database fits your needs, then Postgres is a great choice.

Is PostgreSQL the best?

PostgreSQL is considered the most advanced and powerful SQL compliant and open-source objective-RDBMS. It has become the first choice for corporations that perform complex and high-volume data operations due to its powerful underlying technology.

Why is Postgres so popular?

It is no accident that PostgreSQL has become so popular. It offers its users a huge (and growing) number of functions. These help programmers to create new applications, admins better protect data integrity, and developers build resilient and secure environments.

Is PostgreSQL better than Oracle?

While both databases offer high availability, Oracle computes higher transactions per second. It is considered more functional than PostgreSQL, but the extra functions come at an additional cost (enterprise editions have higher functionality).

What is special about PostgreSQL?

PostgreSQL has a lot of capability. Built using an object-relational model, it supports complex structures and a breadth of built-in and user-defined data types. It provides extensive data capacity and is trusted for its data integrity.

Is PostgreSQL a virus?

postgres.exe is a legitimate file that is also known by the name of PostgreSQL Server. It is a software component for PostgreSQL. By default, it is located in C:\Program Files. Malware programmers create virus files and name them after postgres.exe to spread virus on the internet.