Browse Definitions:
Definition

stateful app

Contributor(s): Matthew Haughn

A stateful app is a program that saves client data from the activities of one session for use in the next session. The data that is saved is called the application’s state.

Apps can be stateful or stateless. When an app is stateful, client data is either stored locally or on a remote host until the user logs out or the session expires after a predetermined time limit. The session data that is saved to persistent disk storage is accessible to the server, to the client and to other applications.

HTTP, on the other hand, is inherently stateless. A web server does not retain information from multiple sessions, so when a state is needed for a web app, it must be built in. If desired, stateful features can be built in with dynamic pages. These pages can retain sessions by way of web address variables and server- and client-side stored data. Cookies are a common way such data is stored.

Most desktop applications and operating systems are stateful. In the early days of cloud computing, however, developers were encouraged to build stateless apps, because stateful apps didn't scale well in the cloud's distributed, virtualized architecture. Limiting data stores to specific locations was difficult in an environment where virtual machines themselves were stateless; the result was that stateful apps moved straight to the cloud often became unstable.

Containerization may be changing that. This OS-level virtualization method for deploying and running distributed applications, without launching an entire VM for each application, allows files to be pulled into the container on startup, and persist somewhere else when containers stop and start. Google's Kubernetes 1.3, for example, adds support for stateful applications in a product called Pet Sets, which allows for hosts to be named and persist beyond container restarts. FlexVolume and Mesos also provide persistent volumes for containers' state data.

This was last updated in April 2018 ???publishDate.suggestedBy???

Continue Reading About stateful app

Start the conversation

Send me notifications when other members comment.

By submitting you agree to receive email from TechTarget and its partners. If you reside outside of the United States, you consent to having your personal data transferred to and processed in the United States. Privacy

Please create a username to comment.

-ADS BY GOOGLE

File Extensions and File Formats

Powered by:

SearchCompliance

  • risk map (risk heat map)

    A risk map, also known as a risk heat map, is a data visualization tool for communicating specific risks an organization faces. A...

  • internal audit (IA)

    An internal audit (IA) is an organizational initiative to monitor and analyze its own business operations in order to determine ...

  • pure risk (absolute risk)

    Pure risk, also called absolute risk, is a category of threat that is beyond human control and has only one possible outcome if ...

SearchCloudProvider

  • cloud ecosystem

    A cloud ecosystem is a complex system of interdependent components that all work together to enable cloud services.

  • cloud services

    Cloud services is an umbrella term that may refer to a variety of resources provided over the internet, or to professional ...

  • uncloud (de-cloud)

    The term uncloud describes the action or process of removing applications and data from a cloud computing platform.

SearchSecurity

  • cyberextortion

    Cyberextortion is a crime involving an attack or threat of an attack coupled with a demand for money or some other response in ...

  • Cybercrime

    Cybercrime is any criminal activity that involves a computer, networked device or a network.

  • National Security Agency (NSA)

    The National Security Agency is the official U.S. cryptologic organization of the United States Intelligence Community under the ...

SearchHealthIT

  • Practice Fusion

    Practice Fusion Inc. is a San Francisco-based company that developed a free electronic health record (EHR) system available to ...

  • RHIA (Registered Health Information Administrator)

    An RHIA, or registered health information administrator, is a certified professional who oversees the creation and use of patient...

  • 21st Century Cures Act

    The 21st Century Cures Act is a wide-ranging healthcare bill that funds medical research and development, medical device ...

SearchDisasterRecovery

SearchStorage

  • Random Access Memory (RAM)

    Random Access Memory (RAM) is the hardware in a computing device where the operating system (OS), application programs and data ...

  • floating gate transistor (FGT)

    A floating gate transistor (FGT) is a complementary metal-oxide semiconductor (CMOS) technology capable of holding an electrical ...

  • bad block

    A bad block is an area of storage media that is no longer reliable for storing and retrieving data because it has been physically...

SearchSolidStateStorage

  • hybrid hard disk drive (HDD)

    A hybrid hard disk drive is an electromechanical spinning hard disk that contains some amount of NAND Flash memory.

Close