What’s New In RHEL6.1 ???

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candon123 2011-05-19 16:36:12 博主文章分类：Linux ©著作权

文章标签 硬件职场休闲在线官方网站 文章分类 数字化转型

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在红帽官方网站溜达了一圈，发现了rhel6.1的一些新特性，具体如下所示：

一、硬件支持：

1、网络接口的命名：

在6.0之前的版本中，网卡的命名规则都是以eth[x]进行命名的，而在6.1以后的版本中，网卡的命名依赖于主板上的网卡芯片名称。

2、在线添加CPU和内存。

3、ixgbe、mlx4、e1000e、be2iscsi、e1000等硬件驱动的更新。

二、内核：

首先是Control Groups内容的更新:

Added control group ability to throttle block device I/O to a particular device, either bytes per second or Input/Output Operations Per Second (IOPS)
Allow the creation of Hierarchical block device control groups, providing the ability to easily integrate with libvirt and other userspace
The new block device control group tunable group_idle, providing better throughput with control groups while maintaining fairness
The new autogroup feature to reduce latencies, for more interactive tasks during CPU intensive workloads
the new cgsnapshot tool provides the ability to take a snapshot of the current control group configuration

1、Scheduler：

Scheduler updates include:

optimize CPU scheduling algorithms by making better decisions on which CPU's processes should run on based on the system NUMA topology
fix undesirable side effects of tickless timer
several optimizations that prevents load balancing from occuring too often.
more use of RCU locking in the scheduler for better concurrent processing.
and many more optimizations and improvements

2、Performance updates and improvements

Numerous updates and improvements to VM and Transparent Huge Page support
Perf_event updates, and add perf lock feature for better way to analyze lock events
Add ftrace events, such as wakeup latency tracer, to graph tracer: more insight into maximum latency for a task to get scheduled after wakeup, and trace of functions called during that time
Introduce kprobes jump optimization to reduce overhead and enhance SystemTap performance
i7300_edac, i7core_edac update supports monitoring of memory errors on motherboards using intel 7300 chipset

3、Networking updates

Receive Packet Steering (RPS) breaks the bottleneck of having to receive network traffic for a NIC on one CPU
Receive Flow Steering (RFS) allows the optimal CPU to receive network data intended for a specific application
Add getsockopt support for TCP thin-streams to reduce latency from retransmission of lost packets in time-sensitive applications
Add Transparent Proxy (TProxy) support for non-locally bound IPv4 TCP and UDP sockets (similar to Linux 2.2)

4、kdump

kdump is an advanced crash dumping mechanism. When enabled, the system is booted from the context of another kernel. This second kernel reserves a small amount of memory, and its only purpose is to capture the core dump p_w_picpath in case the system crashes.

In Red Hat Enterprise Linux 6.1 introduces the kernel message dumper, which is called when a kernel panic occurs. The kernel message dumper provides easier crash analysis and allows 3rd party kernel message logging to alternative targets.

Additionally, the crashkernel=auto parameter syntax is removed. The default parameter syntax is now crashkernel=:[@offset].

三、桌面环境：

1、Network Manager

In Red Hat Enterprise Linux 6.1, NetworkManager has improved support for the configuration of Wi-Fi Protected Access (WPA) Enterprise and Internet Protocol version 6 (IPv6).

2、Graphics Hardware

Red Hat Enterprise Linux 6.1 Beta provides a range of updates for graphics hardware, most notably:

The new driver for Intel Generation 6 Graphics integrated into the Sandy Bridge processor provides full accelerated 2D and 3D graphics
Added support for the Matrox MGA-G200ER graphics chipset
An increased default resolution (1024 x 768 pixels) on monitors that do not supply Extended Display Identification Data (EDID)

四、Storage:

1、LVM Snapshots of Mirrors:

In Red Hat Enterprise Linux 6.1 the ability to take a snapshot of a mirrored logical volume is a fully supported feature.

2、LVM Stripe of Mirrors

It is now possible to combine RAID0 (striping) and RAID1 (mirroring) in a single logical volume in LVM. Creating a logical volume while simultaneously specifying the number of mirrors ('--mirrors X') and the number of stripes ('--stripes Y') results in a mirror devices whose constituent devices are striped.

五、集群：