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With Red Hat Enterprise
Linux established as the leading Linux
operating system for the commercial environment,
Red Hat is working to extend the benefits
of open source software \ further up the
software solution stack to the middleware
and application layers. Red Hat's strategy
is to provide a set of optional layered
products that can be used to enhance the
standard Red Hat Enterprise Linux system.
The following products, offered with full
maintenance and support services, are
available today: |
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| Red
Hat Cluster Suite |
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Red Hat Cluster Suite
allows server systems to be clustered
in a high availability configuration.
High availability clustering (sometimes
referred to as “failover clustering”)
is a technology widely used in commercial
operating system environments; it allows
standard applications to be available
almost continuously with automatic recovery
from hardware failures and shutdowns.
Red Hat Cluster Suite is described in
detail in the whitepaper, “An Overview
of Red Hat Cluster Suite.” Please
refer to that paper for additional information.
For Red Hat Enterprise Linux v.4, a new
release of Red Hat Cluster Suite, v.4,
is being provided. The release delivers
several new features including: |
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Red Hat Cluster
Suite provides core technologies required
by itself and Red Hat GFS. These include
Membership Management, I/O Fencing,
Services Management, and Polling.
Previously, these underlying cluster
technologies were duplicated by the
two products with the latest release
and then integrated. This simplifies
both products, making them easier
to deploy and maintain.
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A Distributed Lock
Manager (DLM). The DLM provides a
cluster wide synchronization service
that can be used by any application.
The DLM is modeled after capabilities
provided by the VMS and Tru64 operating
systems, offering a comprehensive
feature set such as hierarchical lock
trees, multiple concurrency (lock)
modes, blocking and asynchronous notifications,
lock value blocks, and range locking.
The DLM enable application providers
to create fully distributed applications
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Elimination of
the requirement for shared storage.
Previous releases of Red Hat Cluster
Suite required a shared storage subsystem
(SCSI or SAN). With Red Hat Cluster
Suite v.4 this \ requirement has been
eliminated, greatly reducing initial
configuration costs. For applications
which are able to easily replicate
data between servers or require read
only data, it is possible to configure
a simple cluster that will provide
greatly increased availability for
minimal cost.
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| Red
Hat Global File System |
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Red Hat Global File
System (GFS) is an open source, POSIX
compliant cluster file system and volume
manager that executes on Red Hat Enterprise
Linux servers attached to a storage area
network (SAN). It works on all major server
and storage platforms supported by Red
Hat. The leading (and first) cluster file
system for Linux, Red Hat GFS has the
most complete feature set, widest industry
adoption, broadest application support,
and best price/ performance of any Linux
cluster file system today.
Red Hat GFS allows multiple
Red Hat Enterprise Linux servers to simultaneously
read and write a single shared file system
on the SAN, achieving high performance
and reducing the complexity and overhead
of managing redundant data copies. Red
Hat GFS has no single point of failure,
is incrementally scalable from one to
hundreds of Red Hat Enterprise Linux servers,
and works with all standard Linux applications.
Red Hat GFS is integrated
with Red Hat Enterprise Linux and distributed
through Red Hat Network. This simplifies
software installation, updates, and management.
Applications such as Oracle 9i RAC and
workloads in cluster computing, file,
web, and email serving can become easier
to manage and achieve higher throughput
and availability with Red Hat GFS.
For Red Hat Enterprise Linux v.4 a new
release of Red Hat Global File
System, version 6.1, is being provided.
This offers numerous scalability and performance
enhancements, and, perhaps most importantly,
the inclusion of cluster aware Logical
Volume Management capabilities. All the
features mentioned in the earlier section
on Logical Volume Management operate cluster
wide when deployed with Red Hat GFS. Red
Hat Cluster Suite is included with all
Red Hat GFS subscriptions. |
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| Red
Hat Application Server |
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Announced in mid
2004, Red Hat Application Server provides
a J2EE standards compliant, open source,
application server environment. Although
Red Hat works closely with leading application
server vendors such as BEA, Oracle, and
IBM to ensure that their products are
certified for use on Red Hat Enterprise
Linux, many customers requested Red Hat
provide a product based on existing open
source projects. Consequently, Red Hat
Application Server incorporates Tomcat
as the Web Container and JOnAS (from the
ObjectWeb consortium) as the EJB Container.
Other technologies are also included such
as a Struts (a framework for building
Java web applications) and database resource
adapters for Oracle, DB2, PostgreSQL and
MySQL.
These technologies are
integrated into a single product with
documentation and installation procedures
and offered with a full support subscription
that includes security errata, updates,
and upgrades. |
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| Red
Hat Developer Suite |
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Red Hat Developer
Suite is a fully featured Integrated Development
Environment (IDE) for application developers
based on the open source Eclipse project.
Eclipse provides an environment for developers
to efficiently create a wide variety of
applications in a rapidly growing set
of languages including support for C/C++
and Java application development. Eclipse
supports a wide range of operating systems
beyond Red Hat Enterprise Linux including
Windows XP, Windows 2000, Windows 98,
Windows ME, and Sun Solaris. This simplifies
migration of developer skills and applications
from these platforms to Red Hat Enterprise
Linux.
Eclipse also supports a plug-in capability
that allows language specific and Environment
specific extensions. The initial release
of Red Hat Developer Suite includes plug-ins
for C/C++, Java, RPM, and profiling; additional
plug-ins will be provided as they become
available. For detailed information on
Eclipse refer to the project website at
http://www.eclipse.org/. |
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| Red
Hat Directory Server |
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Red Hat Directory
Server is an LDAP-based server that centralizes
application settings, user profiles, group
data, policies, and access control information
into an operating system-independent,
network-based registry. Forming the central
repository for an Identity Management
infrastructure, Red Hat Directory Server
simplifies user management, eliminating
data redundancy and automating data maintenance.
It also improves security, by storing
policies and access control information,
Red Hat Directory Server creates a single
authentication source across entire enterprise
for both intra- and extranet applications. |
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