The Storage Administration Guide contains extensive information on supported file systems and data storage features in Red Hat Enterprise Linux 7. This book is intended as a quick reference for administrators managing single-node (that is, non-clustered) storage solutions.
The Storage Administration Guide is split into the following parts: File Systems, Storage Administration, and Data Deduplication and Compression with VDO.
The File Systems part details the various file systems Red Hat Enterprise Linux 7 supports. It describes them and explains how best to utilize them.
The Storage Administration part details the various tools and storage administration tasks Red Hat Enterprise Linux 7 supports. It describes them and explains how best to utilize them.
The Data Deduplication and Compression with VDO part describes the Virtual Data Optimizer (VDO). It explains how to use VDO to reduce your storage requirements.
1.1. New Features and Enhancements in Red Hat Enterprise Linux 7
Red Hat Enterprise Linux 7 features the following file system enhancements:
As of Red Hat Enterprise Linux 7 eCryptfs is not included. Refer to Red Hat's Security Guide for information on encrypting file systems.
Red Hat Enterprise Linux 7 includes a new application called System Storage Manager. This provides a command-line interface to manage various storage technologies. For more information, see Chapter 16, System Storage Manager (SSM)
XFS Is the Default File System
Red Hat Enterprise Linux 7 introduces a new file system structure. The directories
/lib64 are now nested under
Btrfs (Technology Preview)
Btrfs is available as a Technology Preview feature in Red Hat Enterprise Linux 7 but has been deprecated since the Red Hat Enterprise Linux 7.4 release. It will be removed in a future major release of Red Hat Enterprise Linux.
Btrfs is a local file system that aims to provide better performance and scalability, including integrated LVM operations. This file system is not fully supported by Red Hat and as such is a technology preview. For more information on Btrfs, see Chapter 6, Btrfs (Technology Preview)
NFSv2 No Longer Supported
As of Red Hat Enterprise Linux 7, NFSv2 is no longer supported.