# dm-cache

> component of the Linux kernel's device mapper

**Wikidata**: [Q16991874](https://www.wikidata.org/wiki/Q16991874)  
**Wikipedia**: [English](https://en.wikipedia.org/wiki/Dm-cache)  
**Source**: https://4ort.xyz/entity/dm-cache

## Summary
dm-cache is a component of the Linux kernel's device mapper, classified as logical volume caching software. It functions as a free software solution that creates a logical hybrid drive within the Linux operating system. It is licensed under the GNU General Public License.

## Key Facts
- **Classification:** Instance of free software and logical volume caching software.
- **Component Of:** The Linux kernel's device mapper.
- **Primary Function:** Software package or component that creates a logical hybrid drive.
- **Operating System:** Linux.
- **License:** GNU General Public License.
- **Programming Language:** Q15777 (C).
- **Wikidata ID:** Freebase ID /m/0y6chcm.
- **Copyright Status:** Copyrighted.

## FAQs
### Q: What is the primary function of dm-cache?
A: dm-cache functions as logical volume caching software. It serves as a component of the Linux kernel's device mapper to create a logical hybrid drive.

### Q: What operating system does dm-cache operate on?
A: dm-cache operates on the Linux operating system as a kernel feature.

### Q: Is dm-cache free to use?
A: Yes, dm-cache is classified as free software and is licensed under the GNU General Public License.

## Why It Matters
dm-cache plays a significant role in the Linux storage ecosystem by bridging the gap between different storage technologies. As a component of the device mapper, it allows system administrators and users to create logical hybrid drives. This capability is crucial for optimizing storage performance, as it enables the combination of faster and slower storage media into a single logical volume.

By functioning as logical volume caching software, dm-cache addresses the need for efficient data access without requiring entirely new hardware architectures. Its inclusion as a Linux kernel feature ensures wide compatibility and integration with the operating system. Furthermore, its status as free software under the GNU General Public License ensures that it remains accessible and modifiable by the open-source community, fostering continued development and transparency. It represents a key tool in the implementation of tiered storage solutions within Linux environments.

## Notable For
- Being a native component of the Linux kernel's device mapper.
- Enabling the creation of logical hybrid drives.
- Functioning as logical volume caching software.
- Operating under the GNU General Public License.
- Being an instance of free software within the Linux architecture.

## Body
### Definition and Context
dm-cache is a target for the device mapper framework within the Linux kernel. It is identified as a specific type of logical volume caching software. In the context of system architecture, it falls under the category of Linux kernel features.

### Technical Functionality
The primary utility of dm-cache is its ability to create a logical hybrid drive. This involves software mechanisms that manage data across storage volumes to optimize performance. It is designed to run on the Linux operating system and is written in the programming language identified as Q15777 (C).

### Licensing and Status
The software is fully copyrighted but is classified as free software. It is distributed and developed under the terms of the GNU General Public License (GPL). This licensing ensures that the software remains free for use, study, and modification within the open-source community. It has a sitelink count of 1 and is described in Wikidata as a "component of the Linux kernel's device mapper."