RHEL 7.0 released CentOS 7 coming soon

Red Hat has released the official version 7.0 of Red Hat Enterprise Linux (RHEL. RHEL 7.0 is the next-generation operating system of Red Hat and provides improvements including servers, systems and the overall Red Hat open source experience.

The biggest change is the new file system-XFS will replace ext4-mainly because XFS supports up to 500 TB while ext4 supports only 50 TB. The performance of the XFS file system when processing a large number of small files is unknown, and administrators also need to learn how to manage it. Of course, RHEL 7 still supports ext4. According to the release notes of RHEL 7.0, the main changes in this version include: including the Kernel 3.10 version. The support for swap memory compression can significantly reduce I/O and improve performance. NUMA (Unified Memory Access) is used) APIC (advanced program Interrupt Controller) virtualization, comprehensive DynTick support, blacklist of kernel modules, and kpatch dynamic Kernel patches (Technology Preview. In terms of storage and file systems, RHEL 7.0 uses the LIO kernel target subsystem to provide caching for slow Block devices and introduces LVM caching (Technical Preview ), use XFS as the default file system. The Network grouping technology was introduced as a bind backup method for Link aggregation, which greatly improved NetworkManager, provided firewalld, a dynamic firewall daemon process, and added security extension to the DNSSEC domain name system, it comes with openlms to manage Linux systems and provide common infrastructure, and introduces trusted network connection functions (Technology Preview. KVM (kernel-based virtualization) is greatly improved, such as using virtio-blk-data-plane to improve fast I/O performance (Technology Preview), support for PCI bridging, QEMU sandbox, multi-queue NIC, USB 3.0 support (technical Preview), etc.
Introduce the Linux container Docker. For the compilation tool chain, RHEL 7.0 includes GCC 4.8.x, glibc 2.17, and GDB 7.6.1. Including Performance Co-Pilot, SystemTap 2.4, Valgrind 3.9.0 and other Performance tools. Including Ruby 2.0.0, Python 2.7.5, JAVA 7 and other programming languages. Including Apache 2.4, MariaDB 5.5, and PostgreSQL 9.2. In systems and services, RHEL 7.0 replaces SysV with systemd. Introduce the Pacemaker Cluster Manager and replace the server load balanha program Piranha with keepalived and HAProxy. In addition, the installation program Anaconda is redesigned and enhanced, and GRUB 2 is used as the boot loader.
RHEL 7.0 supports 64-bit AMD/Intel, IBM POWER7/POWER8/System z, and other architectures. You can download the evaluation version from its official website. Red Hat directly releases the source code of RHEL7 to the CentOS website. Since Centos is actually a community release funded by Red Hat, Centos 7 should be released soon.