Description: Zram is a Linux kernel module that creates a compressed block device in RAM, allowing data to be stored more efficiently in memory. This system uses compression to reduce the amount of space that data occupies, resulting in a more effective use of available memory. Zram is particularly useful in resource-limited devices, such as mobile phones and embedded systems, where the amount of RAM may be scarce. By creating a block device in memory, Zram allows the operating system to treat this space as if it were a disk, facilitating memory management and improving overall system performance. Additionally, Zram can help prevent excessive use of swap memory, which can slow down system performance. This module is configurable, allowing users to adjust the compression level and the size of the created block device, providing flexibility according to the specific needs of the system. In summary, Zram is a valuable tool for optimizing memory usage in environments where resources are limited, enhancing the efficiency and performance of various operating systems.
History: Zram was introduced in the Linux kernel in 2011, initially under the name ‘compcache’. Its development was driven by the need to improve memory management in resource-limited devices. Over the years, Zram has evolved and been integrated into various Linux distributions, becoming a standard feature in many modern operating systems.
Uses: Zram is primarily used in mobile devices and embedded systems to optimize memory usage. It is also employed in servers and workstations where efficient memory management is required, especially under high workload situations.
Examples: A practical example of Zram is its implementation in Linux distributions like Ubuntu and Fedora, where it is used to enhance performance on devices with limited RAM. Another case is its use in Android systems, where it helps manage memory more efficiently on phones with modest specifications.
