Brief introduction of new characteristics of RHEL7 (i.)

RHEL7 currently supports architecture:

1,64-bit AMD

2,64-bit Intel

3,IBM POWER

4,IBM System Z

5, no longer supports x86 32bit

Installation Interface:

1, New Installation interface

2, one-stop configuration

3, the new kickstart structure

4, the new partitioning tool

5, support 2TB or more HDD as System boot disk

6. Large changes in installation configuration steps

To start the boot tool:

1, the new GRUB2 boot tool

2, support for CPU architecture including PowerPC

3, support BIOS, EFI and openfirmware basic input/output system architecture

4, support MBR mode of 2TB capacity hard disk and GPT mode 2TB or more capacity hard disk

5, support booting from non-Linux file systems, such as hfs+ and NTFS.

6,rhel5 System: SysV init boot mode,

RHEL6 System: Upstart start Mode,

RHEL7 system: SYSTEMD start Mode

Desktop:

1,gnome3 Default Desktop environment

2,kde4.10 Alternate Desktop environment

Storage subsystem:

1, the kernel supports iSCSI, FCoE, and Iser

2, replaced RHEL6 's TGTD third-party service with Lio Target subsystem

3,LVM Upgrade support RAID mode, replace the Mdadm tool in RHEL6, soft RAID function is implemented by volume management mode

4, update more HBA card support

File system:

1, System home Directory "/" File system defaults to: XFS

2, support Btrfs file system as preview technology, but do not recommend business support

3, better support SSD, ordinary hard disk default scheduling algorithm is CFQ (first in first out), SSD hard disk default setting is deadline (not sorted)

Kernel:

1,RHEL7 kernel: 3.10,rhel6 kernel: 2.6.32

2, support dynamic patch mechanism Kpatch as a technical preview

(The technology is immature, may cause the crash)

3, core file support 3TB after kernel error

4, support kernel module blacklist mechanism

(Modprobe.blacklist=module)

5, support nested virtualization technology, more smooth virtual CPU

6, kernel-level support for resource tuning and allocation

(Cgroup tuning resource management tools)

Virtualization Support:

1, more high-performance KVM core virtualization support, occupying system resources around 3%

2, Virtual machine USB3.0 interface support

3, more convenient and more stable dynamic migration support

4,qcow2 format file-type snapshot support

5, nested virtualization support, can be installed in KVM to configure OpenStack

6, continues to support Xen technology as virtualization, but no longer supports Xen technology as a host

7, enhanced technical support for VMware, with Open-vm-tools replacement vm-tools

Container-type virtualization:

1, Support LXC container-type virtualization

2, support for the most popular technology docker

3, provide the latest RHEL7 docker image

4, support self-built Docker Register

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Brief introduction of new characteristics of RHEL7 (i.)