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310-102 Sun Certified Data Management Engineer with Solstice DiskSuite Software

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310-102 exam Dumps Source : Sun Certified Data Management Engineer with Solstice DiskSuite Software

Test Code : 310-102
Test name : Sun Certified Data Management Engineer with Solstice DiskSuite Software
Vendor name : SUN
: 150 real Questions

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Hey friends! Gotta pass the 310-102 exam and no time for studies Dont worry. I can unravel yr problem in case u believe me. I had similar situation as time was short. Text books didnt help. So, I looked for an effortless soln and got one with the killexams. Their question & respond worked so well for me. Helped pellucid the concepts and mug the difficult ones. found complete questions same as the usher and scored well. Very helpful stuff, killexams.


Check out these real 310-102 questions and study help.
I actually hold lately handed the 310-102 exam with this bundle. This is a incredible respond if you requisite a brief yet reliable training for 310-102 exam. This is a expert degree, so weigh on that you nonetheless want to disburse time playing with - practical relish is key. Yet, as a ways and examination simulations move, killexams.com is the winner. Their checking out engine surely simulates the examination, such as the particular query sorts. It does acquire things less complicated, and in my case, I deem it contributed to me getting a 100% rating! I could not confidence my eyes! I knew I did nicely, however this changed into a surprise!!


simply attempt these actual test questions and achievement is yours.
Found out this top supply after a long time. Everyone prerogative here is cooperative and in a position. Team furnished me superb fabric for 310-102 guidance.


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The killexams.Com Questions & Answers made me efficient enough to split this examination. I endeavored 90/95 questions in due time and passed efficiently. I by no means considered passing. Much obliged killexams.Com for assist me in passing the 310-102. With a complete time work and an legitimate degree readiness aspect through side made me greatly occupied to equip myself for the 310-102 examination. By one means or every other I got here to deem killexams.


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SUN SUN Sun Certified Data

solar Prairie enterprise proprietor has mixed emotion about findings in explosion investigation | killexams.com real Questions and Pass4sure dumps

sun PRAIRIE (WKOW) — There are blended emotions from at least one company proprietor in sun Prairie over the findings of the investigation into the deadly explosion that killed firefighter Cory Barr and injured a few others in July.

Patrick DePula owns Salvatore’s Tomato Pies, just a obstruct from the explosion web site. The constructing the shop is in become broken in the explosion and subsequent hearth.

in terms of the findings of the investigation, DePula spoke of there are loads of layers concerned. The record states that Verizon gotten smaller with abide Communications for the fiber optics cable mission that blanketed work at the intersection of main and Bristol streets. abide first subcontracted with Jet Underground to accomplish the exact development. earlier than performing work, undergo modified subcontractors to VC Tech. VC Tech presided over the over the fiber installation assignment.

“My first reaction is looking at the layers of groups which are involved and the course many individuals were involved with working on the fiber optics conclusion of the road for the infrastructure. It looks that the extra people which are concerned, the greater doubtless there is the casual to acquire error and hold accidents rotate up,” DePula talked about.

He spoke of the company in reality doing the digging should subsist the one that pulls the permit.

“the course that it’s install presently is possibly making it probably for issues fancy this to occur sooner or later. The constant coordination between varied groups working on one challenge.”

“How much practising complete these individuals getting? That’s the question that I ask. How lots practising is the individual getting that’s doing the diggers hotline, if you will? Which is definitely USITT. How a total lot adventure accomplish they have? What type of certification courses are there? And once more it goes again to how many layers hold been worried during this complete incident,” DePula talked about.

After the explosion, DePula turned into compelled to shut his restaurant for 3 weeks.

“bucks lost? probably $200,000 i would say. Between damages, wages, loss profits. Closing this restaurant took away doubtless sixty eight% to 70% of the income that their company brings in,” he talked about. “The actual strike for us, even more so than just fiscal, is having employees subsist idle for three weeks.”

while he has combined emotions concerning the effects of the investigation, DePula hopes the tragedy will back occasions adjustments within the industry.

“I feel that I’m neither cheerful nor upset about the result. i'm left with the notion that the style the trade works needs to subsist modified. and that i reflect that’s what they may silent complete focus their power on, again to steer pellucid of this from occurring in the future.

DePula talked about just because there’s no crook legal responsibility, it doesn’t imply there’s now not civil liability.

On Thursday, three civil lawsuits were filed with regards to the deadly explosion.

in line with court records, Abby Barr, the widow of Capt. Cory Barr, filed a wrongful death lawsuit in opposition t VC Tech, undergo Communications, USIC finding capabilities and THEY Energies.

Two other firefighters, Ryan Welch and Greg Pavlik, hold filed own harm proceedings against the identical agencies. Welch and Pavlik were both damage within the explosion.

One factor DePula hopes the conclusion of the investigation brings is closure for everyone affected.

“I believe that the group is never going to forget. For as long as people are alive that hold been here complete through the pursuits of that night, it’s a protracted going to subsist remembered. but I deem that this will supply the neighborhood a bit bit of closure and the capability to flux ahead with whatever thing next steps are indispensable,” he noted.


Infobright Open supply information Warehouse has been licensed by solar Microsystems | killexams.com real Questions and Pass4sure dumps

Infobright, the open source facts warehousing company, these days announced that Infobright trade edition (IEE) and Infobright neighborhood version (ICE) hold been licensed via sun Microsystems to subsist used with the sun's Unified Storage product line. additionally, Infobright released the outcomes of its performance checking out with the sun Storage(TM) 7410 Unified Storage gadget, which proven up to ninety two p.c boost in query efficiency compared to the same tests conducted with a competitive storage machine.

The trying out became performed the employ of a real-world condition of affairs for records analytics. It consisted of 64 distinctive queries operating repetitively for a brace of hours towards an 8TB Infobright database, various the variety of concurrent users from 1 – sixteen. The hardware atmosphere protected a solar hearth(TM) X4450 server the employ of NFS to connect to a sun Storage 7410 Unified Storage system and demonstrated at complete times sooner (as much as 92 %) outcomes than a competitive SAN based storage unit.

“The remarkable trying out efficiency suggested from the combination of the sun Storage 7410 Unified Storage apparatus and Infobright's information warehouse technology gives valued clientele a straightforward-to-use and within your means approach to research, manage and shop growing to subsist amounts of records. They anticipate the aggregate of Infobright and sun could subsist of splendid pastime and charge to their customers deploying datawarehouse infrastructure for net features and MySQL,” said Graham Lovell, Senior Director, methods community, sun Microsystems.

To examine the total press liberate, click here.

This BeyeNETWORK advice particular consists of assistance from a recent press unlock through the enterprise mentioned.


Cisco to proffer Wi-sun licensed IoT products for secure Utility and sensible metropolis Deployments | killexams.com real Questions and Pass4sure dumps

At Cisco, we’ve been providing networking infrastructure to utilities and sensible Cities complete over.  Their customers hold informed us that they requisite relaxed interoperability across their contraptions and sensors connected over comfortable multi-purpose networks.

As a Sponsor member of the Wi-solar Alliance – a world ecosystem of corporations in quest of to precipitate up the implementation of open standards-primarily based bailiwick enviornment Networks (FAN) and information superhighway of issues (IoT) intermission gadget interoperability – Cisco has been actively working with member businesses to outline, examine at various, and deliver a typical open-requirements based profile for this interoperability.

within the identical manner that diverse smartphones, capsules, computers and other instruments can connect via Wi-Fi, the Wi-solar FAN standards back ensure that diverse utility, smart metropolis and industrial gadgets can securely connect to trade-grade smart utility and smart city networks.

these days we're cheerful to publish Cisco’s back for the novel Wi-sun container district network (FAN) Certification program. Cisco has already begun the manner to certify the CGR1240, IR509, IR510, IR529, and the IR530 industrial routers beneath these novel Wi-sun standards – and they predict to proffer their first Wi-solar certified IoT items by using the intermission of this year.

Wi-sun = instant sensible Ubiquitous Networks.try this video for a short overview.

based on open industry standards published with the aid of the IEEE and IETF, the Wi-sun FAN Certification defines a at ease, resilient, multi-provider IEEE 802.15.4 mesh network that may usher IPv6 Industrial IoT container purposes at a million-node scale. The Wi-solar FAN Certification will give shoppers self assurance that certified items within the application are interoperable with one another and sourced from dissimilar companies.

This novel certification program is the culmination of many years of gigantic work via Cisco – in collaboration with other like-minded vendors – to upshot into upshot and validate a cozy, multi-vendor, multi-carrier FAN infrastructure, giving consumers a workable choice to closed and proprietary carrier choices.

further details in regards to the Wi-sun Alliance may besides subsist found prerogative here.

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310-102 Sun Certified Data Management Engineer with Solstice DiskSuite Software

Study usher Prepared by Killexams.com SUN Dumps Experts


Killexams.com 310-102 Dumps and real Questions

100% real Questions - Exam Pass Guarantee with high Marks - Just Memorize the Answers



310-102 exam Dumps Source : Sun Certified Data Management Engineer with Solstice DiskSuite Software

Test Code : 310-102
Test name : Sun Certified Data Management Engineer with Solstice DiskSuite Software
Vendor name : SUN
: 150 real Questions

I want modern dumps of 310-102 examination.
Hey friends! Gotta pass the 310-102 exam and no time for studies Dont worry. I can unravel yr problem in case u believe me. I had similar situation as time was short. Text books didnt help. So, I looked for an effortless soln and got one with the killexams. Their question & respond worked so well for me. Helped pellucid the concepts and mug the difficult ones. found complete questions same as the usher and scored well. Very helpful stuff, killexams.


Check out these real 310-102 questions and study help.
I actually hold lately handed the 310-102 exam with this bundle. This is a incredible respond if you requisite a brief yet reliable training for 310-102 exam. This is a expert degree, so weigh on that you nonetheless want to disburse time playing with - practical relish is key. Yet, as a ways and examination simulations move, killexams.com is the winner. Their checking out engine surely simulates the examination, such as the particular query sorts. It does acquire things less complicated, and in my case, I deem it contributed to me getting a 100% rating! I could not confidence my eyes! I knew I did nicely, however this changed into a surprise!!


simply attempt these actual test questions and achievement is yours.
Found out this top supply after a long time. Everyone prerogative here is cooperative and in a position. Team furnished me superb fabric for 310-102 guidance.


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I never thought I would subsist using brain dumps for serious IT exams (I was always an honors student, lol), but as your career progresses and you hold more responsibilities, including your family, finding time and money to prepare for your exams salvage harder and harder. Yet, to provide for your family, you requisite to withhold your career and learning growing... So, puzzled and a puny guilty, I ordered this killexams.com bundle. It lived up to my expectations, as I passed the 310-102 exam with a perfectly obliging score. The truth is, they accomplish provide you with real 310-102 exam questions and answers - which is exactly what they promise. But the obliging advice besides is, that this information you cram for your exam stays with you. Dont they complete esteem the question and respond format because of that So, a few months later, when I received a expansive promotion with even bigger responsibilities, I often find myself drawing from the learning I got from Killexams. So it besides helps in the long run, so I dont feel that guilty anymore.


that modified into tremendous! I got actual test questions modern 310-102 exam.
Thankyou killexams..I hold cleared my 310-102 examination with ninety two%. Your question economic group hold become very beneficial. If complete people practices a hundred% certainly from your question set and research complete the questions properly, then hes going to definately prevail. Till now ive cleared three extraordinary tests complete with the befriend of your site. Thanks again.


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It is not the primary time i am using killexamsfor my 310-102 exam, i hold attempted their materials for some vendors examinations, and havent failed as soon as. I absolutely reckon on this steering. This time, I additionally had some technical problems with my pc, so I had to touch their customer back to double test some thing. Theyve been top notch and hold helped me kindhearted matters out, in spite of the fact that the problem become on my prevent, not their software program program.


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310-102 question bank that works!
in case you requisite proper 310-102 schooling on how it works and what are the assessments and complete then dont dissipate it behind and opt for killexams.com as its miles an closing supply of assist. I additionally wanted 310-102 education and i even opted for this super check engine and were given myself the first-class education ever. It guided me with each thing of 310-102 examand provided the pleasant questions and solutions i hold ever visible. The lift a examine at courses additionally were of very much help.


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The killexams.Com Questions & Answers made me efficient enough to split this examination. I endeavored 90/95 questions in due time and passed efficiently. I by no means considered passing. Much obliged killexams.Com for assist me in passing the 310-102. With a complete time work and an legitimate degree readiness aspect through side made me greatly occupied to equip myself for the 310-102 examination. By one means or every other I got here to deem killexams.


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Sun Certified Data Management Engineer with Solstice DiskSuite Software

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Configuring Boot Disks With Solaris Volume Manager Software | killexams.com real questions and Pass4sure dumps

This article is an update to the April 2002 Sun BluePrints OnLine article, "Configuring Boot Disks With Solstice DiskSuite Software." This article focuses on the Solaris 9 Operating Environment, Solaris Volume Manager software, and VERITAS Volume Manager 3.2 software. It describes how to partition and mirror the system disk, and how to create and maintain a backup system disk. In addition, this article presents technical arguments for the choices made, and includes circumstantial runbooks.

Like this article? They recommend 

This article is a practical usher for system disk configuration. It describes how to partition the system disk, mirror it, and create and maintain a contingency boot disk.

We attempt to cover a wide ambit of availability requirements by presenting two-, three-, and four-disk configurations. Every additional disk adds protection. The notion is to select one configuration, based on the cost/benefit ratio in a given situation, then employ the corresponding runbook as a usher for implementation. The SUNBEsdm package is besides provided with scripts for a fully automatic implementation.

In this document, they ensue the concepts of the Sun BluePrints_ reserve "Boot Disk Management—A usher for the Solaris_ Operating Environment" by John S. Howard and David Deeths. They add an definite comparison of the employ of Solaris_ Volume Manager software and VERITAS Volume Manager (VxVM) software for mirroring the system disk.

This article is an update to "Configuring Boot Disks With Solstice DiskSuite_ Software" by Erik Vanden Meersch and Kristien Hens (Part #816-4526-10). The basis for the current text is the Solaris 9 Operating Environment, Solaris Volume Manager software, and VxVM 3.2 software.

This Sun BluePrints OnLine article covers the following topics:

  • Hardware configuration

  • System disk partitioning

  • Two-disk configuration

  • Three-disk configuration

  • Four-disk configuration

  • Comparison of Solaris Volume Manager software and VxVM software

  • Runbook for creating the Solaris Volume Manager software condition database

  • Runbook for a two-disk configuration

  • Runbook for a three-disk configuration

  • Runbook for a four-disk configuration

  • Uses of SUNBEsdm scripts

  • System disks can subsist protected two ways: disk mirroring and file system backup. These two methods are complementary and cover different types of failure. Disk mirroring keeps the system running when a disk stops responding to commands. Backup provides a recovery path when files (or entire file systems) are removed or corrupted.

    Sun Microsystems supports two volume managers for mirroring system disks: VERITAS Volume Manager (VxVM) software and Solaris Volume Manager software. VxVM software is widely used on servers with a big number of disks and ratiocinative volumes and can subsist considered a de facto standard.

    We advocate using Solaris Volume Manager software for mirroring the system disk, even when VxVM software is chosen for volume management of application data. This choice is not obvious at first sight because both Solaris Volume Manager software and VxVM software work perfectly under predictable circumstances. The disagreement becomes apparent in case of calamity (defined in this context as a situation where, due to some problem, the system no longer boots).

    It is not the purpose of this document to provide an absolute best practice for system disk configuration. Instead, their goal is to:

  • Present the arguments in favor of using Solaris Volume Manager software for the system disk. These arguments are intimate to many people, who often learned them the arduous way, but they hold not found them to subsist formally documented.

  • Make life easier for the Solaris Volume Manager software user by providing runbooks with the commands circumstantial and the redress sequences provided. An engineer who routinely installs systems may not requisite this information, but they believe that there is a big audience who can benefit from some assistance in this area. They assume some even of Solaris Operating Environment and Solaris Volume Manager software knowledge.

  • Provide the scripts for fully automatic implementation. The scripts essentially execute runbooks.

  • Runbooks and scripts are based on system disk partitioning in /, /var, and swap. This partitioning is widely accepted as a obliging practice. Because a carelessly partitioned system disk may occasions considerable trouble, they dedicate a divide section in this article to discussing the rationale of the /, /var, and swap partitioning.


    Performance Technologies' Products Certified by Sun Microsystems Solaris(tm) Ready Program | killexams.com real questions and Pass4sure dumps

    Company's PCE335-HSI WAN Communications Adapter has achieved Solaris(tm) Ready Certification from Sun Microsystems

    ROCHESTER, NY – Performance Technologies (NASDAQ: PTIX), a leading provider of innovative network communications solutions, today announced that the company’s PCE335-HSI WAN Communications Adapter has achieved Solaris™ Ready certification from Sun Microsystems. The Solaris Ready program gives users of Sun software access to products developed for the Sun network computing environment that hold met specific standards for vendor support, ease-of-installation, use, management, and network interoperability.

    The PCE335-HSI has been certified to work on SPARC Enterprise(R) platforms such as the Sun SPARC Enterprise(R) M4000 and T2000 servers, and hold been tested with Sun Solstice(TM) X.25 software and PPP protocols with the latest update to Solaris 10 Operating System (OS). The adapter can subsist easily configured to subsist used in both low profile and full height servers. This module is the latest in a list of Performance Technologies’ Solaris Ready products that includes the PCE385, PCI384, and non-HSI version of the PCE335.

    "By partnering with us in the Sun Solaris Ready program, Performance Technologies provides their customers with products that are optimized to meet Sun requirements and standards for product excellence," said Cynthia Hardenbrook, director, ISV Engineering at Sun Microsystems. "This enables their global sales force in commercial, telecommunications, and federal markets to hold a ready-to-use solution to meet their customer’s application requirements."

    The PCE335-HSI provides developers of data and communication networks a fully compliant and programmable subsystem that is supported by Performance Technologies and proven to subsist compatible with the Solaris operating system.

    "Solaris Ready certification presents remarkable opportunities for Performance Technologies’ customers and Sun Microsystems partners alike," said Steven Wigent, product manager at Performance Technologies. "Our participation in the Solaris Ready program gives Sun resellers and customers added assurance in the reliability and character of their products installed in Solaris systems."

    Performance Technologies will subsist showcasing its IPnexus® systems for MicroTCA™ and CompactPCI®, its suite of NexusWare® software (Carrier Grade Linux® OS), and other embedded solutions at the 2009 Embedded Systems Conference Silicon Valley, in San Jose, CA from March 31-April 2, 2009 (booth 1630).

    Online Resources

    Embedded engineers needing more information on Performance Technologies’ Solaris Ready products and solutions can reference the following online resources:

    -- PCE335-HSI product page: go.pt.com/pce335-hsi

    -- PCE385 product page : go.pt.com/pce385

    -- PCI384 product page : go.pt.com/pci384

    -- PCI™ and PCI Express® products: go.pt.com/pci

    -- NexusWare WAN protocol software: go.pt.com/nexusware-wan

    About Performance Technologies (www.pt.com)

    Performance Technologies (NASDAQ: PTIX) is a global supplier of advanced network communications and control solutions to intermission users, application developers, and original apparatus manufacturers that serve mission faultfinding telecommunications as well as aerospace and defense markets. The company provides remotely manageable, IP-centric network elements specifically engineered for high availability, scalability, and long life cycle deployments. Its products are built upon its own U.S. manufactured hardware combined with the company’s NexusWare® Carrier Grade Linux® operating system and software evolution environment plus a broad suite of communications protocols and high availability middleware. Performance Technologies’ product portfolio includes the SEGway™ suite of Signaling (SS7/SIP) Transfer Points, Signaling Gateways and Bridges, and its IPnexus® family of COTS-based application-ready systems, WAN gateways, and multi-protocol communications servers.

    Performance Technologies maximizes the value proposition of its products by leveraging its bailiwick proven systems, software, and hardware technologies developed over a twenty-eight year record of demonstrated innovation. A tightly integrated combination of these technologies results in measurable benefits to its customers through compelling return-on-investment and substantially accelerated time-to-market metrics. The company is headquartered in Rochester, NY and maintains centers of engineering excellence in San Diego and San Luis Obispo, CA, and Kanata, ON, Canada. It has sales and marketing offices in the U.S. in Raleigh, Chicago, Dallas, and San Jose and international offices in London, England and Shanghai, China.

    Forward Looking Statements

    The Private Securities Litigation Reform Act of 1995 provides a "safe harbor" for inevitable forward-looking statements. This press release contains forward-looking statements which reflect the Company's current views with respect to future events and fiscal performance, within the meaning of Section 27A of the Securities Act of 1933 and Section 21E of the Securities Exchange Act of 1934 and is matter to the safe harbor provisions of those Sections. The Company’s future operating results are matter to various risks and uncertainties and could vary materially from those discussed in the forward-looking statements and may subsist affected by various trends and factors which are beyond the Company’s control. These risks and uncertainties include, among other factors, trade and economic conditions, rapid technological changes accompanied by frequent novel product introductions, competitive pressures, dependence on key customers, inability to gauge order flows from customers, fluctuations in quarterly and annual results, the reliance on a limited number of third party suppliers, limitations of the Company’s manufacturing capacity and arrangements, the protection of the Company’s proprietary technology, the dependence on key personnel, changes in faultfinding accounting estimates, potential impairments related to goodwill and investments, alien regulations, and potential material weaknesses in internal control over fiscal reporting. In addition, during infirm or uncertain economic periods, customers’ visibility deteriorates causing delays in the placement of their orders. These factors often result in a substantial portion of the Company’s revenue being derived from orders placed within a quarter and shipped in the final month of the same quarter. The Company undertakes no duty to publicly update any forward-looking statement or risk factor, whether as a result of novel information, future events, or otherwise. Forward-looking statements should subsist read in conjunction with the audited Consolidated fiscal Statements, the Notes thereto, Risk Factors, and Management's Discussion and Analysis of fiscal Condition and Results of Operations of the Company as of December 31, 2008, as contained in the Company’s Annual Report on shape 10-K, and other documents filed with the Securities and Exchange Commission.

    ### NexusWare and IPnexus are registered trademarks of Performance Technologies, Inc.

    Sun, Sun Microsystems, the Sun logo, Solaris, and Solstice are trademarks or registered trademarks of Sun Microsystems, Inc. or its subsidiaries in the United States and other countries. complete SPARC trademarks are used under license and are trademarks or registered marks of SPARC International, Inc. in the U.S. and other countries. Products mien SPARC trademarks are based upon an architecture developed by Sun Microsystems, Inc.

    The names of other companies, products, or services may subsist the trademarks, registered trademarks, or service marks of their respective owners in the United States and/or other countries.


    Get top performance from database storage | killexams.com real questions and Pass4sure dumps

    One of the driving forces behind the sail to storage district networks (SANs) has been the increasing import and size of enterprise databases. As databases grew, administrators found that the only course to efficiently manage and expand database storage is to tap into the flexibility of SANs. However, with the expanded employ of databases on storage networks, storage administrators now must deal with novel performance, backup, restore and management issues-not to mention how to salvage along with the database administrators (DBAs). Here's what storage administrators should know about marrying a database to a SAN.

    Oracle's Storage Push In a note that database vendors are increasingly sensible of how principal the storage behind their databases is, Oracle recently announced that it is launching a storage initiative, which seeks to combine the company's various individual storage initiatives into a strategic shove to focus on how Oracle runs on storage. Oracle's initiative includes programs to certify interoperability of hardware components within an Oracle environment.

    According to Allen Hoke, technical director, system platforms division of Oracle, "This program focuses on storage technology at a high even vs. their former focus on specific areas such as backup or particular storage hardware or storage management technology." In addition, Hoke says, "In order to provide a obliging customer experience, they are teaming with their key OS, server hardware and storage partners to provide a remote back strategy, aligned between us and their partners."

    At this time, Oracle's partners embrace EMC, HP, Hitachi, Network Appliance, Legato, Sun, and Veritas.

    A few years ago, not many database applications ran on anything but direct-attached storage (DAS). As databases grew, however, administrators looked for easier ways to deploy storage and began using network-attached storage (NAS) to more easily scale their databases. With the advent of SANs, administrators are now finding that storage networks can provide even better performance for the most demanding transaction-oriented, high volume databases.

    Today, database applications are starting to sail from DAS to SANs. The reasons: increased ease and precipitate of backup, better scalability, as well as enhanced reliability and performance. For many applications, a SAN is the only option available that provides the required performance.

    Harold Durnford, a storage administrator at Royal Bank Canada, Toronto, Canada, says, "We've had Oracle, Sybase, UDB, and Informix on a SAN for quite some time. The intuition they looked at storage district networks was the challenge of sharing big storage subsystems." In addition, he says, "It wasn't just a distance limitation, but besides real estate. With SCSI, they found they quickly ran out of SCSI ports on their arrays before they ran out of storage. They used the SAN to address fan-out."

    Marty Ward, vice president of product management at Veritas has besides seen this, and says, "Database users are very focused on scaling up and scaling out, which you can't accomplish with dedicated storage."

    Bob Rogers, chief storage architect at BMC says, "Consistent even of performance is driving people to storage district networks, as are better character backup and recovery tools. Those are complete very sturdy motivators to travel to a SAN environment, which is why very big customers hold embraced SANs and upshot databases on them quite early."

    Jim Booth, director of systems engineering at CreekPath, agrees, saying, "People are poignant to SANs primarily to salvage the performance. You can certainly implement a database on either NAS or a SAN. However, if you're doing it on a SAN, you salvage consistent throughput. Though it might subsist harder to manage, a SAN provides better performance and availability."

    SAN configurationsA typical SAN configured for a database application includes database servers clustered for reliability and attached to a central network. At a minimum, two divide database servers are clustered together for redundancy, with dual redundant Fibre Channel (FC) fabrics connected to redundant RAID controllers. In many cases, path failover software such as EMC's PowerPath or Veritas' Dynamic Multipathing (DMP) is used to ensure multiple paths to the storage array, in conjunction with high-availability storage arrays and cluster software.

    Michael Leo, a database administrator at Minneapolis, MN-based Caribou Lake Software, a consulting arduous which helps companies manage their systems, works with a big medical devices manufacturer replacing legacy Alpha VMS systems with Solaris machines, connected to an EMC Symmetrix SAN. "Everything is striped and mirrored [1+0]. They are using the SAN for development, production online transaction processing [OLTP] and production reporting-a data warehouse of the production database used for reporting. Each database is in the 100GB to 200GB range. They hold two copies of the OLTP database-one is a replicated spicy standby, " says Leo. The systems rush Computer Associates' Ingres database.

    "To back up the database, they are using the SAN for disk-to-disk backups. They then employ Veritas' NetBackup and a divide backup LAN to backup the SAN. To manage the disk space on the Sun, they employ Veritas in combination with EMC's SAN management tools," says Leo.

    Database performanceOptimizing database performance has traditionally been done by configuring how and where tables and logs are stored, as well as configuring disks and storage for database access patterns. Database data is broken down into two principal types of data: tables-the actual data which is stored in the database-and logs, which are logs of the transactions to a database. Transaction logs are faultfinding for recovering a database if there's a failure and are besides used for replicating databases. Many databases can besides employ their own native file systems to maximize performance, maintain control over tables and avoid potential performance penalties imposed by file system buffering. Aside from fancy a glance storage, CPU and memory, administrators hold paid a lot of attention to balancing precipitate vs. redundancy of data.

    Database and storage administrators hold carefully selected RAID configurations-for example, using RAID 0+1-both mirroring and striping-in order to gain the greatest read performance from their hardware without losing redundancy. While RAID 5 provides for redundancy at a moderately lower cost, most database vendors today recommend RAID 0+1 for tables as well as logs and only recommend RAID 5 for less performance-critical backup volumes. Caribou Lake's Leo says, "Performance is highly dependent upon how you configure the SAN. They hold seen very obliging performance for databases with RAID 1+0 type configurations. They hold besides seen decent performance for RAID 5, unless the RAID 5 is in rebuild. If the RAID 5 is in rebuild, write performance is so bad, the system may as well subsist down."

    To further optimize access times and data throughput, database administrators hold to besides acquire sure that tables and logs never partake the same spindles on a disk. John Eisenschmidt, a DBA at the American Association for the Advancement of Science, Washington, D.C., says for his eventual install of Oracle, "We made sure not to upshot the index tablespaces with the data tablespaces to help read performance, and upshot the archive logs and redo logs in different places to equilibrium write operations." Eisenschmidt manages about 2.5TB on a SAN filesystem on Xiotech hardware, used for storing user files, though he silent runs his databases on raw dedicated disk.

    However, with the advent of SANs and virtualized storage, administrators no longer hold that even of control of data placement. According to Bob Rogers, chief technology officer of BMC Software, "Most DBAs are absolutely convinced that file placement is an absolutely faultfinding issue, however, most disks today are virtualized-and users don't hold a clue where things are physically located."

    Luckily, the precipitate and manageability of storage hold improved the situation, despite the loss in control. Rogers says, "Today, you can salvage a much more consistent even of performance by going to very big arrays such as those from EMC, IBM, and HDS than you could going to direct-attach disk."

    Enter virtualizationDespite virtualization's steady march into storage systems, most vendors and users reflect that some control is silent needed to fully optimize database access. Oracle's Hoke says, "One of the expansive snide things that can chance with virtualization is that you can hold two tables related in your trade application, with a high even of traffic in inevitable rows of those tables."

    One course to Dramatically multiply Database Performance Question: "Have you Come across some arduous numbers and performance figures for the employ of RAID (at any level) in the database environment?"Securing PDAs with sensitive data - or access to it - should subsist taken seriously. Basically, you requisite to apply the same rigor to PDA security that you would to any other enterprise-class device, with a pellucid security policy and a uniform suite of security software. deem the following:Chris Poelker: Database application performance shouldn't only subsist looked at from an I/O standpoint, but first and foremost from a design perspective. For example, at one customer site, they were using SQL server in a three-tier Web application, where the Web pages were built dynamically from the database. The design used energetic server page scripts in the application tier to query the database for results and the results were then sent to the Web server to build the dynamic pages.By poignant to SQL - stored procedures at the database level, and tuning the indexing methods - and a slight schema redesign-performance improved by over 800%, complete without even touching the back intermission I/O. Never sling hardware at a needy design as the recrudesce on investment is never as obliging as taking the time to rethink the original design.Here's the some things to accomplish for obliging I/O performance:1) employ a lot of spindles. If you travel to and examine at the specifications on the designs to achieve maximum database performance, you'll notice they employ hundreds of drives. By a lot of spindles, I don't imply big RAID sets. You should concatenate many smaller RAID sets into a lone LUN either by using host software or LUN virtualization within the storage hardware, if it has that capability.2) employ low latency paths to storage. Fibre Channel uses a packet-based network, which allows for a full duplex backend. On a SCSI bus, only one thing can chance at a time. Using dual-pathed Fibre disks, you can hold a read command on one side and a write command on the other side of the disk being queued at the same time.3) Spread the I/O load as much as possible. employ many HBAs in the server that are load balancing your I/O across complete the paths. Tools fancy Veritas' Volume Manager or Solstice Disk Suite can befriend accomplish this by creating a lone LUN from many spindles on each path. By using 2Gb paths and four HBAs, you can salvage immediate to 800MB/sec to the LUN.4) employ the proper RAID even for the log and database. Best practice here is log files should subsist on RAID 0+1 (RAID 10) and databases on RAID5 (RAID 0+1 can subsist used on the database for better performance if your budget allows for it).Performance. Today's arduous drives can achieve a sustained throughput of between 30MB/s and 50MB/s and 120 to 140 IOPS (I/Os per second) per spindle. The performance depends on the drive electronics, onboard cache size, rotation precipitate (15,000 RPM is better than 7,200 RPM of course) and maximum hunt latency. If you partition your RAID set into little partitions, and locate your data on the outer cylinders, your performance will travel up substantially. Doing this reduces the hunt time for a particular partition. Now just add up the number of spindles to figure out your maximum IOPS. figure 1680 IOPS using 14 spindles on one HBA, or 3360 IOPS using 2 HBAs to 28 disks doing 64,000 sequential I/O(random I/O will subsist less). Changing the obstruct size of the transfer will either multiply MB per second (throughput) or IOPS. Smaller blocks acquire IOPS travel up, larger blocks acquire throughput travel up.These numbers are for direct I/O, meaning no cache in front of the drives. Adding cache can multiply performance dramatically. I hold seen 33,000 IOPS on a lone LUN during 100% cache hit. So, if you want the best I/O performance available, employ a solid-state disk.Christopher Poelker is a storage architect at Hitachi Data Systems. He answers readers' questions on "Ask the Expert" at SearchStorage.com.

    According to Hoke, a obliging database administrator will try to spread those tables across multiple devices, so he doesn't create hotspots, and besides for availability. However, with virtualization, those two tables may subsist inadvertently placed on the same disk, because virtualization masks physical locations. "Virtualization is remarkable for provisioning storage because it's effortless to sail data and add disks. But with a database, because of performance issues, there are potential drawbacks," Hoke says.

    CreekPath's Booth agrees: "File placement is silent absolutely principal with a SAN, although disks hold gotten faster. It silent comes down to laying down data on a spinning disk, and not putting redo logs and indexes on the same physical drives. That's why it's principal for tools to descry complete the course down to the spindle level, so that when they're laying down data it's not stepping on its own toes."

    Marty Ward, director of product marketing at Veritas concurs, although he doesn't reflect administrators requisite to subsist directly concerned with where data is, "DBAs don't requisite to subsist considered about which spindle disk data lies on. They lift confidence of that for them. Their ratiocinative volumes allow them to sail data around on-the- flit to adjust hotspots, even while running." Other vendors are besides announcing tools in this area.

    Durnford sees things the same way. "Using JBOD, you're much more sensitive to placements [hotspots]. However, using storage arrays, they employ their technology to sail storage around while running to purge hotspots, so that the server doesn't really requisite to know the physical storage location," he says. Durnford uses built-in tools on his Hitachi, IBM, and EMC arrays to deal with hotspots on his volumes.

    SAN issues"In the veteran days of NFS [network file systems], due to requisite of availability capabilities for Oracle, their customers saw storage corruption," says Oracle's Hoke. Because of those issues, Oracle's validation program for network-attached storage arose out of concern about the nature of NFS," he says.

    In a SAN, storage just looks fancy a SCSI disk-reducing a number of the headaches that came with putting databases on network-attached storage, since the interface is identical to that of SCSI. Unlike NAS - with storage networks Oracle has left it to their storage partners to qualify HBAs - switches and front-end storage FC adapters. Hoke says that with a SAN, "We hold not identified anything needing validation."

    However, it silent takes some work to salvage SANs performing prerogative for databases. DBA Eisenschmidt - despite running a SAN for his applications and file systems -is skeptical of using SANs for his database storage. "Our SAN, fancy many I've seen, is optimized for storage capacity and file serving. While Oracle uses Xiotech's Magnitude in their test labs, I was pretty unhappy with the transaction performance they were able to salvage out of it."

    CreekPath's Booth says, "The biggest issue with databases on a SAN is maintaining consistent throughput and access on a database while running other application sharing the same SAN."

    Caribou Lake's Leo agrees, saying, "SANs often reclaim an enterprise money by sharing I/O capacity across departments. But sharing I/O resources between the user files of one department and the DBMS storage for another is awful. The database management system's I/O characteristics are completely different than the user data files, and cache coherency becomes an issue."

    Royal Bank of Canada's Durnford has opted for divide storage networks to unravel some of these problems. He says, "For tape, we're looking at a divide tape SAN. The issue there is database traffic is very time-sensitive, where tape traffic is very backup-oriented. Though you might reflect it's time shifted, we've found there's overlap."

    The other issue most DBAs mention is the complexity of managing storage networks, which are typically managed by divide storage infrastructure staff. "A lot of progress has been made in the eventual brace years, but most system administrators want SANs that are easier to administrate. I want a more reliable SAN whose caching I'm not apprehensive to rotate on," Eisenshmidt says.

    Leo says that when you upshot a database and storage together, "You realize that your SAN management team must work closely with the DBMS team. They hold seen situations where SAN managers hold decided to change the SAN configuration because it seems wasteful or odd, not realizing how carefully tuned the setup was."

    CreekPath's Booth besides agrees, maxim that while mindful tuning of how storage is configured can purge sharing issues, "Both DBAs and storage administrators requisite to subsist on the same page."

    Despite the issues, some users hold had remarkable success running SANs with their databases. John Brooks, vice president of storage engineering at Cleveland, OH-based National City Bank, runs an 18TB SAN, which is based on Brocade switches with IBM and Hitachi arrays. "We hold no issues with running on a SAN. Not even performance issues. It just seems to run," he says. Asked if he does anything special for databases, he says "For SQL and Oracle databases, they sling it on the SAN." Brooks attributes the requisite of issues to the relationship he has with his storage vendors. He says, "We accomplish a lot of research, primarily in the interoperability district that might account for the requisite of issues. They work very closely with their storage vendors to ensure certification and supportability of the environment, in case issues accomplish arise."

    Tools and techniquesBecause SANs' novel role as the primary storage for databases, there's now a requisite for improved tools and software to manage the combination of database applications and storage. "It would subsist nice if vendors could provide some sort of management tool to track why a SAN partition was configured in a inevitable way, thus preventing the loss of historically significant details when SAN management changes hands," says DBA Leo.

    "If I could hold anything from a SAN to acquire it better for a database, I'd interrogate the vendors to write better drivers. Most of the drivers I've seen and worked with just construe the OS the drive is gone when the SAN disconnects, instead of perhaps telling it to wait or trying to free the process," Eisenshmidt says.

    Some vendors appear to subsist listening and are increasingly focusing their efforts on getting their database to rush better on SANs, and their storage and infrastructure to better back databases. Take, for example, Oracle's Hardware-Assisted Resilient Data (HARD) initiative (see "Oracle's storage push"). Oracle's Hoke explains, "We're working with hardware partners to verify that when Oracle data is transferred to a disk it can subsist read. This sounds simple, but with storage management and storage virtualization in storage networks, there are lots of cooks in the broth."

    Part of Oracle's arduous initiative, EMC's Oracle Double Checksum tool offers the competence to verify Oracle data as it is written to arrays in microcode, ensuring that corrupted data is never written to disk. Competitor Hitachi Data Systems has besides announced back for the initiative, with a microcode-based verification of Oracle data in their Lightning 9900V product.

    EMC besides offers its Symmetrix Optimizer, which makes recommendations to administrators on where to rebalance data-a must for administrators looking for spicy spindles. EMC has a immediate partnership with Oracle, including a dedicated engineering team at Oracle Redwood Shores. Chuck Hollis, EMC's vice president of products and markets says, "We hold 12 to 15 engineers inside Oracle, some dedicated to interoperability, and the rest to feature exploitation such as their Double Checksum product and integration between Oracle and their replication products."

    Veritas besides offers a host of products designed to work with databases and SANs. The company's Database Edition products for Oracle9i, IBM DB2, and Microsoft Exchange, including mirroring, backup, replication and clustering features designed for those databases. According to Veritas' Ward, an upcoming release of the company's storage resource management product, "will map data complete the course from a database environment in Oracle or Exchange, through files, complete the course down to disks to expose you which spindles and extents the data is written to."

    BMC offers its PATROL for Storage Management product. BMC's Rogers says, "When you're working with Oracle or Sybase or Microsoft SQL server and even Exchange, they can expose that from a database perspective. For example; they can expose an Oracle instance that is on a Solaris box and attached to a SAN, and descry where it is spread about. They can expose that through a topology manager-all of the connections, lone points of failure, and the course the database is laid out on disk."

    Despite complexities of managing databases running on storage networks, the benefits are clear. For big databases, there's really no better option that a SAN because of the even of performance, consistency, redundancy, and scalability that a storage network provides. Storage and database administrators alike are finding that the only course to back their mission faultfinding applications is to deploy their databases on a storage network. With so much at stake, storage and database vendors will continue to work more in tandem to acquire their products work better together (see "Vendor independence: Are the trade-offs worth it?").



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