Overcoming RAM Limits with Memory Compression (ZRAM)

ZRAM Concept and Principles ZRAM (formerly known as compcache) is a memory compression technology provided by the Linux kernel that creates a virtual block device by compressing a portion of RAM. This technology was first developed by Nitin Gupta in 2009 and officially integrated into the Linux kernel from version 3.14. The core idea of ZRAM is to utilize compressed RAM as swap space instead of disk-based swap, reducing memory usage without the overhead of disk I/O operations. ...

May 2, 2025 · 4 min · 661 words · In-Jun Hwang

Learn to Use the 'tar' Command Quickly

tar is the most widely used compression/decompression tool in Linux. The name tar is short for ‘Tape Archive’, and it was originally created for tape backups. However, it is now the most common tool used to bundle and compress files. Essential Basic Options You Should Know tar commands are broadly divided into action specification options and action modifiers. All tar commands use a combination of these two types of options. ...

February 18, 2025 · 2 min · 387 words · In-Jun Hwang