Translate

Image of RHCE Red Hat Certified Engineer Linux Study Guide (Exam RH302) (Certification Press)
Image of Modern Operating Systems (3rd Edition)
Image of Operating System Concepts
Image of Android Wireless Application Development

Exploring Cisco UCS Emulator Internals

This post looks under the hood at the internals of the Cisco UCS Platform Emulator and points out a number of interesting things about the emulator. It assumes that you are familiar with UCS.

Samsung F2FS

Flash-Friendly File System (F2FS) is a Linux-based log-structured flash file system which takes into account the characteristics of NAND flash memory-based storage devices such as solid-state disks, eMMC, and SD cards with an built-in FTL (flash translation layer). It was developed and is maintained and enhanced by Samsung Electronics. Other available Linux flash file systems, such as jffs2, ubifs and logfs, are targeted at raw flash devices. f2fs was merged into the Linux 3.8 kernel. F2FS is based on Log-structured File System (LFS), which supports versatile “flash-friendly” features. The design has been focused on addressing the fundamental issues in LFS,

Network Namespaces in RHEL7

Linux namespaces are somewhat like Solaris zones in many ways from a user perspective but have significant differences under the hood. The term namespace isolation is often used because the purpose of namespaces is to provide a group of processes with the illusion that that they are the only processes on the system. This is an important requirement for implementing Linux Containers. Namespaces were developed over a number of years by Eric W. Biederman (user namespaces), Pavel Emelyanov, Al Viro, Cyrill Gorcunov, et al. Six user namespaces (out of 10 proposed) are implemented in RHEL7: mnt – mount points, filesystems