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000-332 tall Availability for AIX - Technical champion and Administration -v2

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000-332 exam Dumps Source : High Availability for AIX - Technical champion and Administration -v2

Test Code : 000-332
Test appellation : High Availability for AIX - Technical champion and Administration -v2
Vendor appellation : IBM
real questions : 135 existent Questions

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IBM tall Availability for AIX

Skytap pronounces Upcoming everyday Availability of First Self-provider, Public Cloud Capabilities for IBM i | existent Questions and Pass4sure dumps

No effect discovered, are attempting recent key phrase!These recent capabilities develop Skytap's wonderful cost for migrating and running IBM i and AIX purposes in the cloud with tall availability. Skytap is focused on making it convenient to construct, run, and ev...

3PAR Powers on Utility Storage for high-Availability IBM AIX | existent Questions and Pass4sure dumps

3PAR Powers on Utility Storage for high-Availability IBM AIX

Utility storage enterprise extends aid for IBM HACMP

Fremont, Calif., Jan. 31, 2007--3PAR® introduced today 3PAR InServ® Storage Server guide for IBM® tall Availability Cluster Multi-Processing for AIX (HACMP). HACMP cluster expertise is IBM's flagship high-availability know-how that provides monitoring, failure detection, and automated recuperation of trade functions on IBM AIX servers. For the first time, HACMP consumers can deploy Utility Storage -- an easy, within your budget, and vastly scalable storage platform -- to complement their mission-vital AIX environments.

IBM’s AIX working system is the strategic platform of election for many companies with mission-important environments where downtime can result in lost earnings, customer dissatisfaction, and popularity harm. To evade these issues, businesses regularly deploy high-availability cluster applied sciences comparable to HACMP in conjunction with particularly attainable, excessive-conclusion storage techniques. youngsters, however these storage methods can proffer tall ranges of storage efficiency, scalability, and tall availability, they're expensive to spot into effect and can live complicated to manage. As an alternative, corporations may too choose more not pricey dual-controller, midrange storage -- however in doing so, they compromise availability and kisser accelerated downtime possibility.

3PAR Utility Storage resolves this snare 22 situation by passage of providing a particularly attainable, vastly scalable, clustered structure that can provide extravagant and predictable stages of efficiency -- even beneath failure situations -- for much less cost than high-end arrays. This contains tough far off replication capabilities, via 3PAR far off replica, for disaster restoration of AIX environments. moreover, 3PAR Multipath I/O (MPIO) for IBM AIX offers simple and efficient course failover and healing for top-availability environments.

3PAR Utility Storage introduces absolutely recent levels of simplicity and efficiency to particularly accessible AIX environments. for instance, 3PAR skinny Provisioning enables one-time provisioning of mission-vital ratiocinative storage to AIX systems whereas cutting back deployed physical means by passage of 50 % or greater. 3PAR digital copy, developed on thin replica expertise, permits users to remove hundreds of reservationless, non-duplicative snapshots of mission-vital statistics sets, providing low-budget entry to many feasible recovery aspects.

3PAR InServ Storage Server guide for IBM HACMP know-how is at the second available with IBM system p5 servers.

About 3PAR

3PAR is a issuer of utility storage, a simple, efficient, and massively scalable tiered-storage array for utility computing that lets clients serve more with much less. For more assistance, talk over with

vision options' ORION for AIX is termed 'excessive Availabililty product of the 12 months' by using Tech target's Search four hundred.Com | existent Questions and Pass4sure dumps

January 30, 2006 11:33 ET | source: imaginative and prescient solutions

IRVINE, Calif., Jan. 30, 2006 (PRIMEZONE) -- imaginative and prescient options, a number one extravagant availability reply issuer to the global 5000, today announced that its ORION(tm) for AIX has got superior honors in TechTarget's Search four fabricated from the yr Awards in the tall Availability category.

TechTarget award winners are chosen with the aid of a panel that contains Search400 editorial personnel, clients, trade experts and analysts. The products are judged by passage of criteria that contains innovation, efficiency, ease of use, ease of integration into current environments, manageability and cost.

"we are very comfortable that ORION for AIX has been recognized as iSeries' extravagant Availability manufactured from the year," spoke of Henry Martinez, Chief technology Officer of vision solutions. "ORION for AIX is a modern product for the AIX atmosphere offering tall availability readily of use, simple administration and befriend for AIX on pSeries and iSeries platforms. complete of this interprets to surprising consumer value."

because ORION for AIX is non-intrusive to the AIX kernel, installing, configuration, management and quandary-shooting are specifically handy and the matter of introducing further protection considerations is reduced. No AIX working outfit patches are required to assist the solution, making for less complexity with full-functionality. additionally, ORION for AIX is the best solution available on the market to assist AIX on an iSeries/i5/OS hosted partition. This helps server consolidation, growing the desultory to stream censorious UNIX company purposes onto a unique iSeries platform.

"ORION for AIX is a much innovation to replicate AIX-hosted partitions on the iSeries," notable one award decide. "This recent product continues tempo with IBM's clustering way for the iSeries. The product's performance for AIX partitions construct for ease of exhaust and integration that in fact stood out to the judging panel."

About imaginative and prescient options

vision solutions, headquartered in Irvine, CA, is a leading extravagant availability reply issuer to the global 5000. With ORION(tm) utility, services and help, the enterprise promises options for protecting an organization's mission-essential functions and tips from planned and unplanned downtime. With greater than 2,000 shoppers and 12,000 licenses around the world, the enterprise works intently with a worldwide community of channel companions and IBM to bring world-category options. imaginative and prescient options is an IBM Premier trade colleague and an IBM tall Availability company associate. vision options is a member of the publicly traded IDION community of corporations (JSE:IDI). For extra counsel on imaginative and prescient solutions, delight consult with the enterprise's website at

About Search400 is the main online useful resource for greater than a hundred and fifty,000 enterprise IT specialists who are searching for counsel on the latest iSeries technologies and considerations in order that they could construct choices, analysis products and set strategies. The web page provides common information reviews, skilled guidance and interactive points for the iSeries community, and is the quantity-one source of iSeries e-newsletters, white papers and Webcasts. greater counsel can too live discovered at

vision solutions, Inc. Jennifer Brannon (949) 253-6543

Irvine, California, u.s.

imaginative and prescient solutions, Inc. Jennifer Brannon (949) 253-6543

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High Availability for AIX - Technical champion and Administration -v2

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Vision Solutions' ORION for AIX is Named 'High Availabililty Product of the Year' by Tech Target's Search 400.Com | existent questions and Pass4sure dumps

January 30, 2006 11:33 ET | Source: Vision Solutions

IRVINE, Calif., Jan. 30, 2006 (PRIMEZONE) -- Vision Solutions, a leading tall availability solution provider to the Global 5000, today announced that its ORION(tm) for AIX has received top honors in TechTarget's Search Product of the Year Awards in the tall Availability category.

TechTarget award winners are chosen by a panel that includes Search400 editorial staff, users, industry experts and analysts. The products are judged by criteria that includes innovation, performance, ease of use, ease of integration into existing environments, manageability and value.

"We are very pleased that ORION for AIX has been recognized as iSeries' tall Availability product of the year," said Henry Martinez, Chief Technology Officer of Vision Solutions. "ORION for AIX is a revolutionary product for the AIX environment delivering tall availability with ease of use, simple administration and champion for AIX on pSeries and iSeries platforms. complete of this translates to outstanding customer value."

Because ORION for AIX is non-intrusive to the AIX kernel, installation, configuration, management and trouble-shooting are exceptionally easy and the concern of introducing additional security issues is decreased. No AIX operating system patches are required to champion the solution, making for less complexity with full-functionality. Furthermore, ORION for AIX is the only solution on the market to champion AIX on an iSeries/i5/OS hosted partition. This supports server consolidation, creating the opening to paddle censorious UNIX trade applications onto a unique iSeries platform.

"ORION for AIX is a much innovation to replicate AIX-hosted partitions on the iSeries," said one award judge. "This recent product keeps pace with IBM's clustering strategy for the iSeries. The product's functionality for AIX partitions construct for ease of exhaust and integration that truly stood out to the judging panel."

About Vision Solutions

Vision Solutions, headquartered in Irvine, CA, is a leading tall availability solution provider to the Global 5000. With ORION(tm) software, services and support, the company delivers solutions for protecting a company's mission-critical applications and information from planned and unplanned downtime. With more than 2,000 customers and 12,000 licenses around the world, the company works closely with a worldwide network of channel partners and IBM to deliver world-class solutions. Vision Solutions is an IBM Premier trade colleague and an IBM tall Availability trade Partner. Vision Solutions is a member of the publicly traded IDION group of companies (JSE:IDI). For more information on Vision Solutions, delight visit the company's website at

About Search400 is the leading online resource for more than 150,000 enterprise IT professionals who seek information on the latest iSeries technologies and issues so they can construct decisions, research products and set strategies. The site provides original advice stories, expert counsel and interactive features for the iSeries community, and is the number-one source of iSeries e-newsletters, white papers and Webcasts. More information can live organize at

Vision Solutions, Inc. Jennifer Brannon (949) 253-6543

Irvine, California, UNITED STATES

Vision Solutions, Inc. Jennifer Brannon (949) 253-6543

Unix overview: The latest features in AIX, HP-UX and Solaris | existent questions and Pass4sure dumps

Even with the popularity of open source and Linux, commercial Unix platforms are still an necessary allotment of most data centers. The most widely used versions of Unix are IBM's AIX, Hewlett-Packard's HP-UX and Solaris from Oracle-Sun. In this tip, I proffer an overview of recent enhancements made to each of these Unix distributions.


AIX 6 was released in November 2007 and updated in October 2009. AIX 7 was just released in August 2010. Since AIX 7 is brand new, I'll examine features of both versions.

AIX 6 and 7 are available in three editions:

  • Express Edition: economical and intended for smaller workloads
  • Standard Edition
  • Enterprise Edition: includes additional management capabilities
  • AIX 6 introduced Workload Partitions (WPARs), software-based virtualization that allows multiple AIX environments to race on a unique system. WPARs provide isolation from other processes and WPARs. Each WPAR may own unique administrator control, network addresses, file systems, users and groups. Processor and system resources are shared and apportioned between WPARs.

    WPARs participate a unique global instance of AIX as compared with ratiocinative Partitions (LPARs), each of which runs an independent copy of AIX. When the WPAR global instance is patched, complete subordinate WPARs inherit the patch. AIX 7 adds Trusted Kernel Extensions, which can confine access to specific kernel extensions to particular WPARs. With Life Application Mobility, applications in a WPAR can live moved without stopping and re-starting, so workloads can live balanced across multiple systems.

    AIX 6 too provides numerous security enhancements:

  • Role-Based Access Control is used to concede management access to specific users.
  • Trusted AIX provides compartmentalized multi-level security, allowing restriction of access to specific system resources and devices, such as partitions, networks or printers.
  • The enhanced journaled file system extended now provides an encrypted file system (EFS) using a variety of encryption algorithms.
  • The recent secure by default installation option restricts the system and network services to the minimum to maximize security.
  • Trusted execution mode verifies application integrity via digital signature before execution to reduce the risk of software tampering.
  • Cryptographic framework provides hardware acceleration for cryptographic functions, such as those used in the EFS, IP security or trusted execution.
  • Availability enhancements in AIX 6 include:

  • Concurrent kernel update allows inevitable modifications to live made without requiring a system restart.
  • Dynamic tracing simplifies debugging by allowing probes to live placed in existing application or kernel code without requiring recompilation.
  • AIX 7 introduces Cluster Aware, which provides commands and APIs to create clusters of individual AIX systems. These clusters may live managed as a unique group, you can monitor events and disk space, and performance data for the entire cluster is available.

    Also recent in AIX 7 is the Event Infrastructure, used by Cluster Aware, which can monitor pre-defined system events.


    HP-UX 11i was originally released in 2000 and the latest major version is HP-UX 11i v3 (11.31), released in 2007. The latest update (6th) to 11.31 was in March 2010.

    HP-UX is provided in one of four combinations of operating system and application bundles, called an operating environment (OE):

  • Base (BOE) is the standard version.
  • Virtualization Server (VSE-OE) is BOE plus the HP Virtual Server Environment and GlancePlus monitoring tools.
  • High Availability (HA-OE) is BOE plus Serviceguard availability tools and GlancePlus monitoring tools.
  • Data focus (DC-OE) is complete of the above.
  • The Virtual Server Environment provides virtualization capabilities and workload management tools. Hardware and software isolation is achieved using a difficult partition, or nPartition, which establishes boundaries that completely protect one virtual machine from any faults in another (including software, hardware or electrical faults). In HP-UX 11.31, dynamic nPartitions can live modified while the partition is in use.

    Software-only isolation is achieved using a virtual partition, or vPar, which runs its own instance of HP-UX and has its own participate of CPU, remembrance and I/O. HP-UX 11.31 introduces dynamic remembrance migration between vPars and allows mixed vPar versions within a unique nPartition.

    Dynamic Root Disk allows cloning and updating of a running root file system, assisting in system recovery and reducing downtime during upgrades.

    Unified File Cache integrates the different mechanisms used for file caching: page cache and buffer cache. This eliminates the possibility of file system inconsistencies when using system calls that depend on differing mechanisms.

    Encrypted Volume File System 2.0 provides AES encryption at the file or volume level. Security containment isolates system resources and provides fine-grained privileges and role-based access control.

    Oracle Solaris

    Solaris 10 was first released in 2005. Updated releases are named by the month and year of release. The latest update, too called Update (U8), is Solaris 10 10/09, released in October 2009.

    The Zettabyte File System (ZFS), introduced early in Solaris 10, can now champion the root file system and live used to boot the system. champion for user- and group-level disk quotas has too been added to ZFS.

    Solaris Zones and Solaris Containers provide virtualization and resource containment. Zones sequester one or more application services within the operating system. A Container is a Zone that too manages operating system resources to avert one Zone from consuming complete existent system resources. Recently added resource management features allow CPU usage to live limited in multiple ways: fair-share, capped or dedicated. remembrance and network bandwidth resources can too live managed.

    A Zone may establish a sever instance of the TCP/IP networking stack through an Exclusive IP Zone, allowing the Zone to own a unique network configuration.

    Logical domains (now called Oracle VM Server for SPARC) provide a higher flush of virtualization abstraction. A ratiocinative domain runs a virtual machine within which an operating system can live booted, halted and rebooted (requires Solaris 10 11/06, U3, or later). Other operating systems supported by SPARC hardware may too live supported. Ubuntu Linux can live race in a ratiocinative domain.

    Many security features previously available in a special release of Solaris called Trusted Solaris own been incorporated into the regular release as of Solaris 10 5/08 (U5). Solaris Trusted Extensions include fine-grained privileges using Mandatory Access Control for policy-based access to system resources such as devices, files, networks, printing and window management. User Rights Management provides role-based access control and complies with the Federal Information Processing Standard.

    About the author: King Ables holds BA and MSc degrees in computer science and has worked in customer support, software development, systems and network administration, and user education. He has written numerous technical articles for online and print journals and is author or co-author of three books on Unix and Linux.

    Database Administration: Creating the Database Environment | existent questions and Pass4sure dumps

    Establishing a usable database environment requires a much deal of skill, knowledge, and consideration. This chapter will contour the principles involved in establishing a usable database environment.

    This chapter is from the reserve 

    One of the primary tasks associated with the job of DBA is the process of choosing and installing a DBMS. Unfortunately, many trade executives and IT professionals without database management background assume that once the DBMS is installed, the bulk of the toil is done. The truth is, choosing and installing the DBMS is hardly the most difficult allotment of a DBA’s job. Establishing a usable database environment requires a much deal of skill, knowledge, and consideration. This chapter will contour the principles involved in establishing a usable database environment.

    The process of choosing a suitable DBMS for enterprise database management is not as difficult as it used to be. The number of major DBMS vendors has dwindled due to industry consolidation and domination of the sector by a few very great players.

    Yet, great and medium-size organizations typically race multiple DBMS products, from as few as two to as many as ten. For example, it is not uncommon for a great company to exhaust IMS or IDMS and DB2 on the mainframe, Oracle and MySQL on several different UNIX servers, Microsoft SQL Server on Windows servers, as well as pockets of other DBMS products such as Sybase, Ingres, Adabas, and PostgreSQL on various platforms, not to mention single-user PC DBMS products such as Microsoft Access, Paradox, and FileMaker. Who chose to install complete these DBMSs and why?

    Unfortunately, often the reply is that not much thought and planning went into the decision-making process. Sometimes the determination to purchase and install a recent DBMS is driven by a trade requisite or a recent application. This is reasonable if your organization has no DBMS and must purchase one for the first time. This is rarely the case, though. Regardless of whether a DBMS exists on-site, a recent DBMS is often viewed as a requirement for a recent application. Sometimes a recent DBMS product is purchased and installed without first examining if the application could live successfully implemented using an existing DBMS. Or, more likely, the DBAs know the application can live implemented using an existing DBMS but want the organizational power or champion to reject a recent DBMS proposal.

    There are other reasons for the actuality of multiple DBMS platforms in a unique organization. Perhaps the company purchased a commercial off-the-shelf application package that does not race on any of the current DBMS platforms. Sometimes the determination to buy a recent DBMS is driven by the want to champion the latest and greatest technology. For example, many mainframe shops touching from a hierarchic (IMS) or CODASYL (IDMS) database model to the relational model deployed DB2, resulting in an additional DBMS to learn and support. Then, when client/server computing became popular, additional DBMSs were implemented on UNIX, Linux, and Windows servers.

    Once a DBMS is installed, removal can live difficult because of incompatibilities among the different DBMSs and the necessity of converting application code. Furthermore, when a recent DBMS is installed, aged applications and databases are usually not migrated to it. The aged DBMS remains and must continue to live supported. This complicates the DBA’s job.

    So what should live done? Well, the DBA group should live empowered to construct the DBMS decisions for the organization. No trade unit should live allowed to purchase a DBMS without the leave of the DBA group. This is a difficult provision to implement and even more difficult to enforce. trade politics often toil against the DBA group because it frequently possesses less organizational power than other trade executives.

    Choosing a DBMS

    The DBA group should set a policy regarding the DBMS products to live supported within the organization. Whenever possible, the policy should minimize the number of different DBMS products. For a shop with multiple operating systems and multiple types of hardware, choose a default DBMS for the platform. dispirit divergence from the default unless a compelling trade case exists—a trade case that passes the technical inspection of the DBA group.

    Most of the major DBMS products own similar features, and if the feature or functionality does not exist today, it probably will within 18 to 24 months. So, exercise caution before deciding to choose a DBMS based solely on its capacity to champion a specific feature.

    When choosing a DBMS, it is prudent to select a product from a tier-1 vendor as listed in Table 2.1. Tier 1 represents the largest vendors having the most heavily implemented and supported products on the market. You cannot fade wrong with DB2 or Oracle. Both are approved and champion just about any ilk of database. Another major player is Microsoft SQL Server, but only for Windows platforms. DB2 and Oracle race on multiple platforms ranging from mainframe to UNIX, as well as Windows and even handheld devices. Choosing a DBMS other than these three should live done only under specific circumstances.

    Table 2.1. Tier-1 DBMS Vendors

    DBMS Vendor

    DBMS Product

    IBM Corporation


    New Orchard Road

    Armonk, NY 10504

    Phone: (914) 499-1900

    Oracle Corporation


    500 Oracle Parkway

    Redwood Shores, CA 94065

    Phone: (650) 506-7000

    Microsoft Corporation

    SQL Server

    One Microsoft Way

    Redmond, WA 98052

    Phone: (425) 882-8080

    After the gargantuan three approach MySQL, Sybase, Teradata, and Informix. Table 2.2 lists these tier-2 DBMS vendors. complete of these offerings are property DBMS products, but their installed base is smaller, their products are engineered and marketed for niche purposes, or the companies are smaller with fewer resources than the gargantuan Three (IBM, Oracle, and Microsoft), so there is some risk in choosing a DBMS from tier 2 instead of tier 1. However, there may live solid reasons for deploying a tier-2 solution, such as the tall performance offered by Informix or the data warehousing and analytics capabilities of Teradata.

    Table 2.2. Tier-2 DBMS Vendors

    DBMS Vendor

    DBMS Product

    IBM Corporation

    Informix Dynamic Server

    New Orchard Road

    Armonk, NY 10504

    Phone: (914) 499-1900

    Sybase Inc. (an SAP Company)

    Adaptive Server Enterprise

    6475 Christie Avenue

    Emeryville, CA 94608

    Phone: (510) 922-3500

    Teradata Corporation


    10000 Innovation Drive

    Dayton, OH 45342

    Phone: (937) 242-4030

    MySQL (a subsidiary of Oracle Corporation)


    Phone: (208) 338-8100

    Of course, there are other DBMS products on the market, many of which are fine products and worthy of consideration for specialty processing, inevitable predefined needs, and niche roles. If your company is heavily into the open-source software movement, PostgreSQL, EnterpriseDB, or MySQL might live viable options. If an kick DBMS is necessary for a specific project, you might account ObjectDesign or Versant. And there are a variety of NoSQL DBMS offerings available, too, such as Hadoop, Cassandra, and MongoDB.1

    However, for the bulk of your data management needs, a DBMS from a tier-1, or perhaps tier-2, DBMS vendor will deliver adequate functionality with minimal risk. A myriad of DBMS products are available, each with inevitable features that construct them worthy of consideration on a case-by-case basis. Choosing any of the lower-tier candidates—even such major names as Software AG’s Adabas and Actian’s Ingres—involves incurring additional risk. mention to Appendix B for a list of DBMS vendors.

    I execute not want it to sound as if the selection of a DBMS is a no-brainer. You will requisite a strategy and a blueprint for selecting the preempt DBMS for your specific situation. When choosing a DBMS, live positive to account each of these factors:

  • Operating system support. Does the DBMS champion the operating systems in exhaust at your organization, including the versions that you are currently using and blueprint on using?
  • Type of organization. remove into consideration the corporate philosophy when you choose a DBMS. Some organizations are very conservative and enjoy to keep a tense rein on their environments; these organizations attend to gravitate toward traditional mainframe environments. Government operations, monetary institutions, and insurance and health companies usually attend to live conservative. More-liberal organizations are often willing to account alternative architectures. It is not uncommon for manufacturing companies, dot-coms, and universities to live less conservative. Finally, some companies just execute not reliance Windows as a mission-critical environment and prefer to exhaust UNIX; this rules out some database vendors (Microsoft SQL Server, in particular).
  • Benchmarks. What performance benchmarks are available from the DBMS vendor and other users of the DBMS? The Transaction Processing Performance Council (TPC) publishes official database performance benchmarks that can live used as a guideline for the basic overall performance of many different types of database processing. (Refer to the sidebar “The Transaction Processing Performance Council” for more details.) In general, performance benchmarks can live useful as a broad indicator of database performance but should not live the only determinant when selecting a DBMS. Many of the TPC benchmarks are race against database implementations that are not representative of most production database systems and therefore are not indicative of the actual performance of a particular DBMS. In addition, benchmarks are constantly updated to bespeak recent and improved performance measurements for each of the major DBMS products, rendering the benchmark “winners” obsolete very quickly.
  • Scalability. Does the DBMS champion the number of users and database sizes you intend to implement? How are great databases built, supported, and maintained—easily or with a lot of pain? Are there independent users who can verify the DBMS vendor’s scalability claims?
  • Availability of supporting software tools. Are the supporting tools you require available for the DBMS? These items may include query and analysis tools, data warehousing champion tools, database administration tools, backup and recovery tools, performance-monitoring tools, capacity-planning tools, database utilities, and champion for various programming languages.
  • The Transaction Processing Performance Council is an independent, not-for-profit organization that manages and administers performance benchmark tests. Its mission is to define transaction processing and database benchmarks to provide the industry with objective, verifiable performance data. TPC benchmarks measure and evaluate computer functions and operations.

    The definition of transaction espoused by the TPC is a trade one. A typical TPC transaction includes the database updates for things such as inventory control (goods), airline reservations (services), and banking (money).

    The benchmarks produced by the TPC measure performance in terms of how many transactions a given system and database can effect per unit of time, for example, number of transactions per second. The TPC defines three benchmarks:

  • TPC-C, for planned production workload in a transaction environment
  • TPC-H, a determination champion benchmark consisting of a suite of business-oriented ad hoc queries and concurrent data modifications
  • TPC-E, an updated OLTP workload (based on monetary transaction processing)
  • Additional information and in-depth definitions of these benchmarks can live organize at the TPC Web site at (see pattern 2.1).

  • Technicians. Is there a adequate supply of skilled database professionals for the DBMS? account your needs in terms of DBAs, technical champion personnel (system programmers and administrators, operations analysts, etc.), and application programmers.
  • Cost of ownership. What is the total cost of ownership of the DBMS? DBMS vendors charge wildly varying prices for their technology. Total cost of ownership should live calculated as a combination of the license cost of the DBMS; the license cost of any required supporting software; the cost of database professionals to program, support, and administer the DBMS; and the cost of the computing resources required to operate the DBMS.
  • Release schedule. How often does the DBMS vendor release a recent version? Some vendors own rapid release cycles, with recent releases coming out every 12 to 18 months. This can live superior or bad, depending on your approach. If you want cutting-edge features, a rapid release cycle is good. However, if your shop is more conservative, a DBMS that changes frequently can live difficult to support. A rapid release cycle will occasions conservative organizations either to upgrade more frequently than they would enjoy or to live with outdated DBMS software that is unlikely to own the identical flush of champion as the latest releases.
  • Reference customers. Will the DBMS vendor supply current user references? Can you find other users on your own who might provide more impartial answers? converse with current users to elicit issues and concerns you may own overlooked. How is support? Does the vendor respond well to problems? execute things generally toil as advertised? Are there a lot of bug fixes that must live applied continuously? What is the property of recent releases? These questions can live answered only by the folks in the trenches.
  • When choosing a DBMS, live positive to remove into account the complexity of the products. DBMS software is very complicated and is getting more complicated with each recent release. Functionality that used to live supported only with add-on software or independent programs is increasingly being added as features of the DBMS, as shown in pattern 2.2. You will requisite to blueprint for and champion complete the features of the DBMS. Even if there is no current requirement for inevitable features, once you implement the DBMS the programmers and developers will find a understanding to exhaust just about anything the vendor threw into it. It is better to blueprint and live prepared than to allow features to live used without a blueprint for supporting them.

    Figure 2.2

    Figure 2.2. Convergence of features and functionality in DBMS software

    DBMS Architectures

    The supporting architecture for the DBMS environment is very censorious to the success of the database applications. One wrong election or poorly implemented component of the overall architecture can occasions poor performance, downtime, or unstable applications.

    When mainframes dominated enterprise computing, DBMS architecture was a simpler concern. Everything ran on the mainframe, and that was that. However, today the IT infrastructure is distributed and heterogeneous. The overall architecture—even for a mainframe DBMS—will probably consist of multiple platforms and interoperating system software. A team consisting of trade and IT experts, rather than a unique person or group, should construct the final architecture decision. trade experts should include representatives from various departments, as well as from accounting and legal for software condense issues. Database administration representatives (DA, DBA, and SA), as well as members of the networking group, operating system experts, operations control personnel, programming experts, and any other interested parties, should live included in this team.

    Furthermore, live positive that the DBMS you select is preempt for the nature and ilk of processing you blueprint to implement. Four levels of DBMS architecture are available: enterprise, departmental, personal, and mobile.

    An enterprise DBMS is designed for scalability and tall performance. An enterprise DBMS must live capable of supporting very great databases, a great number of concurrent users, and multiple types of applications. The enterprise DBMS runs on a large-scale machine, typically a mainframe or a high-end server running UNIX, Linux, or Windows Server. Furthermore, an enterprise DBMS offers complete the “bells and whistles” available from the DBMS vendor. Multiprocessor support, champion for parallel queries, and other advanced DBMS features are core components of an enterprise DBMS.

    A departmental DBMS, sometimes referred to as a workgroup DBMS, serves the middle ground. The departmental DBMS supports petite to medium-size workgroups within an organization; typically, it runs on a UNIX, Linux, or Windows server. The dividing line between a departmental database server and an enterprise database server is quite gray. Hardware and software upgrades can allow a departmental DBMS to tackle tasks that previously could live performed only by an enterprise DBMS. The steadily falling cost of departmental hardware and software components further contributes to lowering the total cost of operation and enabling a workgroup environment to scale up to serve the enterprise.

    A personal DBMS is designed for a unique user, typically on a low- to medium-powered PC platform. Microsoft Access, SQLite, and FileMaker2 are examples of personal database software. Of course, the major DBMS vendors too market personal versions of their higher-powered solutions, such as Oracle Database Personal Edition and DB2 Personal Edition. Sometimes the low cost of a personal DBMS results in a misguided attempt to choose a personal DBMS for a departmental or enterprise solution. However, execute not live lured by the low cost. A personal DBMS product is suitable only for very small-scale projects and should never live deployed for multiuser applications.

    Finally, the mobile DBMS is a specialized version of a departmental or enterprise DBMS. It is designed for remote users who are not usually connected to the network. The mobile DBMS enables local database access and modification on a laptop or handheld device. Furthermore, the mobile DBMS provides a mechanism for synchronizing remote database changes to a centralized enterprise or departmental database server.

    A DBMS designed for one ilk of processing may live ill suited for other uses. For example, a personal DBMS is not designed for multiple users, and an enterprise DBMS is generally too complicated for unique users. live positive to understand the differences among enterprise, departmental, personal, and mobile DBMS software, and choose the preempt DBMS for your specific data-processing needs. You may requisite to choose multiple DBMS types—that is, a DBMS for each level—with usage determined by the needs of each development project.

    If your organization requires DBMS solutions at different levels, favor the selection of a group of DBMS solutions from the identical vendor whenever possible. Doing so will minimize differences in access, development, and administration. For example, favor Oracle Database Personal Edition for your single-user DBMS needs if your organization uses Oracle as the enterprise DBMS of choice.

    DBMS Clustering

    Clustering is the exhaust of multiple “independent” computing systems working together as a single, highly available system. A modern DBMS offers clustering champion to enhance availability and scalability. The two predominant architectures for clustering are shared-disk and shared-nothing. These names execute a superior job of describing the nature of the architecture—at least at a tall level.

    Shared-nothing clustering is depicted in pattern 2.3. In a shared-nothing architecture, each system has its own private resources (memory, disks, etc.). The clustered processors communicate by passing messages through a network that interconnects the computers. In addition, requests from clients are automatically routed to the system that owns the resource. Only one of the clustered systems can “own” and access a particular resource at a time. In the event a failure occurs, resource ownership can live dynamically transferred to another system in the cluster. The main advantage of shared-nothing clustering is scalability. In theory, a shared-nothing multiprocessor can scale up to thousands of processors because they execute not meddle with one another—nothing is shared.

    In a shared-disk environment, complete the connected systems participate the identical disk devices, as shown in pattern 2.4. Each processor still has its own private memory, but complete the processors can directly address complete the disks. Typically, shared-disk clustering does not scale as well for smaller machines as shared-nothing clustering. Shared-disk clustering is better suited to large-enterprise processing in a mainframe environment. Mainframes—very great processors—are capable of processing immense volumes of work. much benefits can live obtained with only a few clustered mainframes, while many PC and midrange processors would requisite to live clustered to achieve similar benefits.

    Shared-disk clustering is usually preferable for applications and services requiring only modest shared access to data and for applications or workloads that are very difficult to partition. Applications with heavy data update requirements are probably better implemented as shared-nothing. Table 2.3 compares the capabilities of shared-disk and shared-nothing architectures.

    Table 2.3. Comparison of Shared-Disk and Shared-Nothing Architectures



    Quick adaptability to changing workloads

    Can exploit simpler, cheaper hardware

    High availability

    Almost unlimited scalability

    Performs best in a heavy read environment

    Works well in a high-volume, read-write environment

    Data requisite not live partitioned

    Data is partitioned across the cluster

    The major DBMS vendors provide champion for different types of clustering with different capabilities and requirements. For example, DB2 for z/OS provides shared-disk clustering with its Data Sharing and Parallel Sysplex capabilities; DB2 on non-mainframe platforms uses shared-nothing clustering. Oracle’s existent Application Clusters provide shared-disk clustering.

    For most users, the primary capitalize of clustering is the enhanced availability that accrues by combining processors. In some cases, clustering can befriend an enterprise to achieve five-nines (99.999 percent) availability. Additionally, clustering can live used for load balancing and failover.

    DBMS Proliferation

    As a rule of thumb, create a policy (or at least some simple guidelines) that must live followed before a recent DBMS can live brought into the organization. Failure to execute so can occasions a proliferation of different DBMS products that will live difficult to support. It can too occasions confusion regarding which DBMS to exhaust for which development effort.

    As mentioned earlier, there is a plethora of DBMS vendors, each touting its benefits. As a DBA, you will live bombarded with marketing and sales efforts that attempt to convince you that you requisite another DBMS. Try to resist unless a very compelling understanding is given and a short-term revert on investment (ROI) can live demonstrated. Even when confronted with cogent reasons and superior ROI, live positive to double-check the arguments and ROI calculations. Sometimes the reasons specified are outdated and the ROI figures execute not remove everything into account—such as the additional cost of administration.

    Remember, every DBMS requires database administration support. Moreover, each DBMS uses different methods to effect similar tasks. The fewer DBMS products installed, the less complicated database administration becomes, and the better your chances become of providing efficient data management resources for your organization.

    Hardware Issues

    When establishing a database environment for application development, selecting the DBMS is only allotment of the equation. The hardware and operating system on which the DBMS will race will greatly repercussion the reliability, availability, and scalability (RAS) of the database environment. For example, a mainframe platform such as an IBM zEC12 running z/OS will probably provide higher RAS than a midrange IBM xSeries machine running AIX, which in rotate will probably exceed a Dell server running Windows. That is not to verbalize everything should race on a mainframe; other issues such as cost, experience, manageability, and the needs of the applications to live developed must live considered. The bottom line is that you must live positive to factor hardware platform and operating system constraints into the DBMS selection criteria.

    Cloud Database Systems

    Cloud computing (see the sidebar) is increasing in usage, especially at petite to medium-size businesses. A cloud implementation can live more cost-effective than structure an entire local computing infrastructure that requires management and support.

    A cloud database system delivers DBMS services over the Internet. The trade-off essentially comes down to trusting a cloud provider to store and manage your data in revert for minimizing database administration and maintenance cost and effort. Using cloud database systems can enable organizations, especially smaller ones without the resources to invest in an enterprise computing infrastructure, to focus on their trade instead of their computing environment.

    By consolidating data sources in the cloud, it is practicable to improve collaboration among partners, arm offices, remote workers, and mobile devices, because the data becomes accessible as a service. There is no requisite to install, set up, patch, or manage the DBMS software because the cloud provider manages and cares for these administrative tasks. Of course, the downside is that your data is now stored and controlled by an external agent—the cloud provider. Another inherent risk of cloud computing is the possibility of nefarious agents posing as legitimate customers.

    An specimen of a cloud database platform is Microsoft SQL Azure. It is built on SQL Server technologies and is a component of the Windows Azure platform.

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