Red Hat APPLICATION STACK 1.2 RELEASE Manuale Utente Scaricare il pdf (Pagina 10)

Chapter 1. Introduction

Scalable Filesystems

ext4 is the default filesystem, and xfs offers robustness, scalability, and high-performance.

Virtualization

KVM includes performance improvements and new features, sVirt protects the host, VMs, and data

from a guest breach, SRIOV and NPIV deliver high performance virtual use of physical devices, and

libvirt leverages kernel CG controller functionality.

Enterprise Security Enhancement

SELinux includes improved ease of use, application sandboxing, and significantly increased coverage

of system services, while SSSD provides unified access to identity and authentication services as well

as caching for off-line use.

Development and Runtime Support

SystemTap (allows instrumentation of a running kernel without recompilation), ABRT (simple collection

of bug information), and improvements to GCC (version 4.4.3), glibc (version 2.11.1), and GDB

(version 7.0.1).

1.2. Application Compatibility

This release of Red Hat Enterprise Linux provides dependencies so applications designed to run on

earlier versions of the operating system continue to run with minimum disruption. To that end, older

versions of key libraries are included to preserve legacy interfaces that might have changed between

this release and prior versions. These libraries serve as dependencies primarily for applications written

in C/C++.

Please note that it is not necessary to re-test or re-certify applications between minor releases of

Red Hat Enterprise Linux. Red Hat Enterprise Linux compatibility policies ensure that applications

running on a version of the release will continue to run throughout the life of the release. For example,

applications certified on Red Hat Enterprise Linux 6.0 will be fully compatible on Red Hat Enterprise

Linux 6.1 and so on.

Refer to the following table for details on these compatibility packages:

Table 1.1. Compatibility Libraries

Package Description

compat-db The Berkeley DB database compatibility library.

The Berkeley Database (Berkeley DB) is a

programmatic toolkit that provides embedded

database support for both traditional and client/

server applications. This package contains

various versions of Berkeley DB which were

included in previous releases.

compat-expat1 Expat is a stream-oriented XML parser. This

package provides library compatibility with

previous versions.

compat-glibc glibc is the C library used for system calls and

other basic facilities. This package provides

compatibility (and runtime libraries) for the

compiling of binaries that require older glibc

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