Clustering Management Tools Support Growing Applications.Over the past several years, clusters of workstations and persona computers have become increasingly popular. The incremental scalability of processors, memories, and mass storage systems, together with the high-performance interconnection networks, have made clusters a cost-effective platform for distributed and parallel computing Solving a problem with multiple computers or computers made up of multiple processors. It is an umbrella term for a variety of architectures, including symmetric multiprocessing (SMP), clusters of SMP systems, massively parallel processors (MPPs) and grid computing. .
A cluster is a group of systems linked by a high-speed interconnect and functioning as a single resource. It differs from multiprocessing in that a multiprocessing machine runs a single copy of the operating system operating system (OS)
Software that controls the operation of a computer, directs the input and output of data, keeps track of files, and controls the processing of computer programs. . Clustering, on the other hand, connects several systems, each running its own copy of the operating system.
Cluster interconnect is slower than multiprocessing. To try to alleviate bottlenecks in the interconnect, some try to give all machines in the cluster direct access to a shared resource Sharing a peripheral device (disk, printer, etc.) among several users. For example, a file server and laser printer in a LAN are shared resources. Contrast with shared logic. such as a disk. This eliminates the need for one server to go through another server to access a disk resource and also reduces the amount of data going over a shared path (bus contention Bus contention is an undesirable state of the bus of a computer, in which more than one memory mapped device or the CPU is attempting to place output values onto the bus at once. ).
Clustering is used for several reasons: availability, scalability, and unifying management. Any given cluster technology may offer one or more of these advantages in any combination, but not all cluster technologies offer all three advantages.
Clustering is also a key strategy for departmental computing Processing a department's data with its own computer system. See distributed computing. , putting it as a solution of choice for such applications as e-commerce and Internet-related uptime. Software management options have been growing for this space and two major software developers recently announced new products in this space.
The rapid acceptance of e-commerce is increasing the level of availability required for Internet infrastructures to obtain optimal uptime. For an e-commerce site, downtime means lost revenue, reduced customer loyalty, and can affect shareholder value. Traditionally, proprietary fault-tolerant systems Fault-tolerant systems
Systems, predominantly computing and computer-based systems, which tolerate undesired changes in their internal structure or external environment. have been used to implement optimal uptime solutions, but rapidly growing and more open Internet infrastructures are being deployed on clustered Unix and Windows/NT servers.
VERITAS Software Veritas Software Corp. was an international software company that was founded in 1983 as Tolerant Systems, renamed Veritas Software Corp. in 1989, and merged with Symantec in 2005. It was headquartered in Mountain View, California. Corporation, one of the industry's leading enterprise-class application storage management software providers, announced VERITAS Global Cluster Manager A Cluster manager is a small service on each node of the cluster and it does active and desactive available services. Cluster Manager should create a specific list of node auth, manage and repliace it to each node. , which provides monitoring and fail-over of clusters distributed around the world. Managing a virtually unlimited number of VERITAS Cluster Server Veritas Cluster Server (also known as VCS) is a High-availability cluster software, for Unix, Linux and Microsoft Windows computer systems, created by Veritas Software (now part of Symantec). installations, VERITAS Global Cluster Manager is a unique solution for customers building optimal uptime e-commerce platforms, implementing disaster recovery processes, or requiring monitoring of all mission critical systems from a single operations center The facility or location on an installation, base, or facility used by the commander to command, control, and coordinate all crisis activities. See also base defense operations center; command center. .
VERITAS has not been slow about partnering with major hardware vendors in implementing cluster management solutions. Although EMC Corporation EMC Corporation (NYSE: EMC) is an American Fortune 500 and S&P 500 manufacturer of software and systems for information management and storage. It is headquartered in Hopkinton, Massachusetts, USA. considers itself more and more a software business, they have been active participants with VERITAS in e-business applications.
"EMC (1) (EMC Corporation, Hopkinton, MA, www.emc.com) The leading supplier of storage products for midrange computers and mainframes. Founded in 1979 by Richard J. Egan and Roger Marino, EMC has developed advanced storage and retrieval technologies for the world's largest companies. and VERITAS Software have many joint customers utilizing EMC Symmetrix The Symmetrix is EMC's flagship enterprise storage array. There have been seven generations of Symmetrix hardware, with the first appearing in 1994 and the latest introduced in 2006. Remote Data Facility (SRDF SRDF Symmetrix Remote Data Facility
SRDF Symmetric Remote Data Facility ) and VERITAS Cluster Server to maximize their application uptime," according to according to
1. As stated or indicated by; on the authority of: according to historians.
2. In keeping with: according to instructions.
3. Linda Wright, director of the E-Infostructure Developers Program at EMC. "As part of our program, which integrates new applications with EMC's open Enterprise Storage solutions, we are building links for SRDF business continuance software to integrate with VERITAS Global Cluster Manager. By doing so, we provide our mutual customers with a tool that allows them to efficiently manage and control availability of critical applications."
There is no doubt that the e-applications are growing in importance. This means clustering is no longer a data center or large corporate preserve.
"We find that more and more organizations, even those outside the e-commerce space, are discovering a need to architect global or intercontinental disaster recovery solutions to protect their most-critical applications," said Harvey Hindin, vice president, High Availability Also called "RAS" (reliability, availability, serviceability) or "fault resilient," it refers to a multiprocessing system that can quickly recover from a failure. There may be a minute or two of downtime while one system switches over to another, but processing will continue. and Clusters Service, DH Brown Associates.
Significant Downtime Losses
To achieve this near-continuous level of availability, administrators must build on their single site high clustering solutions by replicating critical data to one or more geographically remote sites. In the event of a major failure or disaster at a primary site, the entire cluster can, then, be failed-over to one of the redundant remote sites. This capability can also be used to implement a "follow-the-sun" operation, in which a cluster is intentionally failed-over to a location closest to the peak network demand, optimizing customer service.
A typical e-commerce site can lose over $100,000 per hour due to downtime, according to Forrester Research, and some observers suggest that most sites achieve only 99.4% uptime, leaving them vulnerable to competitors and lost revenue opportunities in some of these skyrocketing markets. The most successful Internet retailing sites must strive to achieve increased uptime through geographic distribution of services running on modular, open-systems building blocks. "We have a large installed base of current VERITAS Cluster Server customers who have told us they need to take high availability to the next level for Internet applications," said Fred van den Bosch, executive vice president of engineering at VERITAS.
The new VERITAS Global Cluster Manager is a cluster management product for VERITAS Cluster Server, the company's flagship, and heterogeneous high-availability product for Unix and NT applications. Using a single web browser The program that serves as your front end to the Web on the Internet. In order to view a site, you type its address (URL) into the browser's Location field; for example, www.computerlanguage.com, and the home page of that site is downloaded to you. console, a cluster administrator may monitor a virtually unlimited number of VERITAS Cluster Server clusters anywhere in the world both within and across firewalls. In addition to supporting fail-over of a VERITAS Cluster Server cluster from one site to another, VERITAS Global Cluster Manager is scheduled to offer the flexibility of integrating with other VERITAS software for host-based data replication or major third-party replication products.
Lest We Forget Lest We Forget is a phrase popularised in 1887, by Rudyard Kipling; it formed the refrain of his poem Recessional.
As a title, it may refer to any of:
"Linux has attracted quite a bit of early attention because of its development model, its licensing model, its capability, and [its] single machine reliability," said Dan Kusnetzky, vice president of system software research for International Data Corporation. "Although Linux has a wealth of load balancing and computer farm software, high availability or clustering software has been missing."
Legato Systems is addressing this gap in the growing Linux software surge with its new eCluster solution. Legato Cluster Enterprise and this eCluster product are the first heterogeneous, high-availability software solutions to support the Linux operating system. The two clustering applications immediately provide support for Caldera caldera: see crater.
Large, bowl-shaped volcanic depression that forms when the top of a volcanic cone collapses into the space left after magma is ejected during a violent volcanic eruption. The term is Spanish for “caldron. OpenLinux eServer 2.3 and Red Hat Linux Red Hat Linux, assembled by Red Hat, was a popular, "middle-aged" Linux distribution (not as old as Slackware but older than Ubuntu) upon its discontinuation in 2004.
Red Hat Linux 1.0 was released on November 3, 1994. 6.1. Legato's solutions represent a recognition of Linux, providing a high suite of benefits required for Linux to establish itself within enterprise business-critical data centers and e-commerce deployments.
Legato also announced that its Legato Cluster Enterprise and Legato eCluster have been tested on IBM's Netfinity Linux servers and are IBM (International Business Machines Corporation, Armonk, NY, www.ibm.com) The world's largest computer company. IBM's product lines include the S/390 mainframes (zSeries), AS/400 midrange business systems (iSeries), RS/6000 workstations and servers (pSeries), Intel-based servers (xSeries) "Server Proven" solutions. Legato's availability solutions are the first clustering solutions of any type on Linux to attain this important benchmark on IBM Netfinity servers.
"Legato Cluster Enterprise provides exceptional capabilities for customers of IBM Netfinity for Linux," stated Sandy Carter, director of Partnerworld for Developers at IBM. "This will enable customers to deploy Netfinity running Linux within enterprise data centers, as well as e-commerce solutions. IBM is pleased that Legato has selected Netfinity as its premier Linux solution platform and has announced Netfinity Server Proven solutions."
Legato Cluster Enterprise is designed to protect applications running in back office environments, such as ERP (Enterprise Resource Planning) An integrated information system that serves all departments within an enterprise. Evolving out of the manufacturing industry, ERP implies the use of packaged software rather than proprietary software written by or for one customer. , RDB See Oracle Rdb.
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2. rdb - A roll-your-own database, created in the Unix toolkit philosophy. It appears to be written in the awk language, and is very compatible with awk. It uses awk's syntax and can be combined with awk commands. and messaging solutions. Legato eCluster is designed to protect applications and overall load capacity within Web farm environments running Cisco Local Director or other types of Web load balance solutions. To enable this, Legato eCluster includes a Cluster Toolkit for Apache, a component providing fine-tuned protection for Apache Web services on Linux Web servers.
Any of the Legato clustering solutions running on Linux servers can be used on their own, or as part of a larger cluster configuration that includes Windows NT/2000 or Unix servers. All of the servers running Legato eCluster or Legato Cluster Enterprise are centrally manageable from a single GUI (Graphical User Interface) A graphics-based user interface that incorporates movable windows, icons and a mouse. The ability to resize application windows and change style and size of fonts are the significant advantages of a GUI vs. a character-based interface. console, which can run on Linux, Windows NT/2000 or Unix platforms to manage and control the entire mixed-platform configuration. Caldera Systems is one of the leading Linux software developers and is committed to an e-server strategy.
Product suites like Legato's "advance our OpenLinux eServer strategy which is to provide ready-to-deploy server class solutions," said Benoy Tamang, vice president of marketing for Caldera. "Our customers benefit immediately from the mature availability capabilities that Legato is providing for Web environments with products like Legato eCluster, as well as data center deployments."
"At Red Hat, we know that high availability is a key component to enabling Linux deployments within enterprise data centers and e-commerce configurations," stated Paul McNamara, senior director of business development for Red Hat, another major name in Linux software development. "We support Legato because Legato Cluster Enterprise and Legato eCluster are designed to meet the requirements of Red Hat customers in both of these critical environments."
Legato Cluster solutions extend the Linux free-code philosophy to high availability by providing a Perl scripting environment that independent programmers can use to create high availability solutions for specific applications and deployments. Legato Cluster Enterprise provides the backbone capabilities for defining and managing resources. Programmers can use Perl scripting rules that determine how those resources are managed and in response to which sensed events. Legato plans to encourage independent programmers to share their code along with tips and tricks for setting up high-availability configurations with Legato Cluster solutions on Linux through Cluster-for-Linux user groups and online forums.
Nora Denzel, executive vice president of Legato and a well-known name in mass storage software, observed, "We are also pleased to embrace the open-code philosophy of Linux by providing our Perl scripting environment for high availability. This is a strong indication of Legato's commitment to the Linux platform and to the community of Linux programmers that have made Linux the fastest maturing platform in history."