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This article mainly introduces whether redhat can be regarded as linux system, which has certain reference value and can be used for reference by friends who need it. I hope you will learn a lot after reading this article. Next, let the editor take you to learn about it.

RedHat6 is a version of Linux issued by RedHat, which has high efficiency, expansibility and reliability.

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The latest version is RedHat6.1. Compared with previous versions, RedHat6.0 adds a lot of functionality.

High efficiency, scalability and reliability

Red Hat Enterprise Linux 6 supports more sockets, kernels, threads, and memory space. The scheduling of file system tasks pays more attention to the comprehensive consideration of the running time and priorities of tasks, and optimizes the execution of system tasks and resource allocation by using hardware response and multi-core topology.

The default file system for Red Hat Enterprise Linux 6 is ext4 (fourth extended file system), which is more robust, scalable to 16TB, and includes a XFS file system that can be upgraded to 100TB. Its NFSv4 significantly improves the shortcomings of NFSv3 and is backward compatible. New file systems are allowed to run in user space, and users can also test and develop on new FUSE-based file systems, such as cloud file systems.

In terms of high availability, the Web interface based on Conga is redesigned to add additional functions and make it easier to use. Cluster communication management system Corosync technology is also more mature, stable and lightweight. The improved KVM server virtual machine can manage services physically and in the state of failure or shutdown. A simple cluster instruction can be used to manage logs from different servers and record events in a consistent format, making it more readable.

In terms of power management, the new kernel clock design technology of Red Hat Enterprise Linux 6 can keep the system in a state of minimum system consumption. Reduce the power consumption of the Imax O subsystem as much as possible. The system administrator can also reduce power consumption by controlling the current threshold. In addition, optimized access to real-time devices also helps reduce the energy consumption of writing metadata to the file system.

Unprecedented resource management

In the allocation of system resources, the Cgroups of Red Hat Enterprise Linux 6 can organize system tasks for tracking and allow other system services to control the resources (partitions) that may be consumed by cgroup tasks. Two user-space tools, cgexec and cgclassify, provide the simple configuration and management capabilities of cgroup. At the same time, memory resource controller and network resource controller are applied on cgroup to achieve the * * application of memory resources and network traffic.

On storage, Red Hat Enterprise Linux 6 supports SAN-based large storage, automatic Imax O calibration and self-tuning, as well as extended SCSI and ATA standards and Imax O prompts to allow automatic adjustment and Imax O calibration.

Red Hat Enterprise Linux 6 supports IPv6. Multi-queue networking improves processing parallelism, allowing users to get better performance from multiple processors and CPU cores. Support for data center bridging includes data flow priority and flow control to improve quality of service. In addition, for data flow priority and flow control, in order to improve the quality of service.

Stable application development and production platform

Apache, Squid and Memcached are mainly improved on the Web infrastructure. Red Hat Enterprise Edition Linux 6 supports Apache2.2 version, while Squid mainly supports manageability and IPv6 performance. The new version of Red Hat supports Memcached 1.4.4, which is a high-performance, highly scalable, distributed, memory-based object caching system that greatly improves the speed of dynamic Web applications.

In terms of Java performance support, the tight integration of Red Hat Enterprise Linux and OpenJDK includes support for Java detectors in SystemTap, which enables better Java debugging. We all know that Tomcat6 is an open source and best-of-breed application server running on the Java platform. By supporting Java Servlets and Java server pages (JSP), Tomcat provides a stable and reliable environment for developing and deploying dynamic Web applications. So in the red hat enterprise Linux also improved the support of Tomcat 6.

In addition, Red Hat Enterprise Linux has also made a number of adjustments on applications, databases PostgreSQL 8.4.4, MySQL 5.1.47 and MySQL 5.1.47, resulting in significant improvements in performance.

Integrated Virtualization

Red Hat Enterprise Linux is mainly kernel-based virtualization, which fully integrates the KVM hypervisor into the kernel, so the improvement of all RHEL systems is beneficial to the virtualized environment. And the application environment is consistent with both physical and virtual systems. This allows users to easily move virtual machines between hosts, resulting in deployment flexibility that allows managers to consolidate resources into fewer machines during off-peak periods, or release hardware during maintenance downtime.

Using the hardware abstraction of the kernel, the application can be transferred from the physical environment to the virtualized environment independent of the underlying hardware. Improved CPU and memory scalability to accommodate more virtual machines per server. Virtual technology uses advanced office virtualization interfaces, including non-traditional devices such as clocks (supported by empty-loop kernels), interrupt controllers, spin lock subsystems and vmchannel.

Enterprise manageability

The installation options for Red Hat Enterprise Linux 6 have been reorganized to "workload profile" so that each system installation can provide the appropriate software for specific tasks. The standards-based Linux manageability specification (SBLIM) uses Web-based enterprise management (WBEM) to manage systems. Replacing mkinitrd with Dracut minimizes the impact of underlying hardware changes, makes it easier to maintain, and makes it easier to support third-party drivers.

Improved support for printing technology so that printers can discover printer configuration services from CUPS and system-config-printer in time. The addition of SNMP-based ink and toner supply level monitoring and printer status monitoring simplifies monitoring functions and allows users to effectively manage ink and toner inventory.

In addition, Red Hat Enterprise Linux's Samba includes support for Windows 2008 R2 trust relationships: Windows cross-forest, transitive trust, and one-way domain trust. Allows applications to use OpenChange to access Microsoft Exchange Server using local protocols, and allows mail clients such as Evolution to integrate more closely with Exchange Server.

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