New features of Red Hat Enterprise Linux 7

RHEL7 new features:

1. Identity Management

Kerberos 's cross-platform trust mechanism:Kerberos is fully compatible with the Microsoft Active Directory, enabling full use of Active Directory authentication.

REALMD: This feature simplifies the configuration of RHEL into the Microsoft Active Directory and supports Autodiscover domain information.

Rhel 7 adds two key new features that improve the way Rhel works with AD . cross-domain trusts (cross-realm trusts) are now established between RHEL7 and ad, so ad users can access resources without logging on to the Linux side. another ad -related feature added by RHEL 7 is REALMD, which automates querying and adding DNS information for ad(or other Red Hat authentication services) .

2. Performance management

Performance Assistance Tools: RHEL7 provides a new framework and a new general-purpose graphical interface to help manage it. System bottlenecks can be collected and analyzed.

Tuning and Tuning configurations: RHEL7 provides dynamic tuning solutions to address system performance bottlenecks. System administrators can also manually modify the system presets to achieve the tuning effect

3. Virtualization

Enhanced RHEL7 Virtual machine: Fully compatible with Vmwarevshpere architecture,RHEL7 comes with open Vmtool ,3D Graphics drive and OpenGLX11 the support. Makes RHEL7 easier to deploy on VMware platforms. RHEL 7 also supports fast communication between VMware ESXi.

Virtual/ o: Provides each virtual machine with a call to the underlyingPciThe interface of the device to achieve kernel-level isolation. Improved machine safety and compatibility
Virtual MachinesUSB3.0interface Support
QCOW2format file-type snapshot support
Nested virtualization support, you can set theKVMinstallation configuration inOpenStack
has strengthened theVMWAREtechnical support, bring your ownOpen-vm-toolsReplaceVm-tools
support for the hottest technologyDocker
Dockeris based on the current popular Application virtualization technology. Applications are packaged inDocker, it is completely isolated from the system and other applications, so it can be migrated between systems and functioning properly.

4. File System

RHEL7 selects XFS as its default file system .

RHEL7.0 The default use of XFS when installing ,not that the original EXT file system is no longer used,RHEL7 still support ext4. but in the face of future explosive growth in the volume of data,ext file system has become more and more powerless. the XFS file system is full of big data, with a single file system that can support up to 8EB size, a single file size of up to 16T, and a rich logging system that is a powerful file system for big data storage.

XFS is a highly scalable, high-performance file system. is also the default file system for RHEL7/CENTOS7.

the XFS file system can be backed up and restored through tools xfsdump and Xfsrestore,

6. Network Management

New network Management interface NMCLI

7. Service Management

Invoking a service script using systemctl

RHEL7used insystemdinstead of the originalSysV, bysystemdto manage the services in the system. Systemddefined with the originalSysVof theInitprocesses to manage service and system processes in a completely different way. Enables services in the system to automatically resolve dependencies between services, and can support the parallel start of services! In other words,RHEL7.0than the originalSysVThe operating system starts faster, is more stable, and can be perfectly supportedDocker!

8.RHEL7 Desktop

Use the latest Gnome 3 is the default desktop environment, using the latest KDE 4.10 As an alternative desktop environment.

Summarize:

RHEL7The biggest change for developers is the kernel upgrade to3.10
RHEL7 the biggest change for system managers is that the system and service management program is modified toSystemd
RHEL7 the biggest change for network operators is that network management programs and services are modified toNetworkManager
RHEL7 the biggest change for storage engineers isISCSIThe export service was modified toLIO kernel Target Subsystem
RHEL7 The best news for cloud engineers is native supportKVMNesting of virtualization andDockerContainer Virtualization

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New features of Red Hat Enterprise Linux 7