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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 denomination : Sun Certified Data Management Engineer with Solstice DiskSuite Software
Vendor denomination : SUN
: 150 real Questions

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SUN Sun Certified Data Management

Wild Coast sun achieves first-in-Africa web Zero consume certification | killexams.com real Questions and Pass4sure dumps

solar international's Wild Coast solar has executed Africa's first web Zero consume rating from the green constructing Council of South Africa (GBCSA).

Wild Coast Sun achieves first-in-Africa Net Zero  consume certification

"we are delighted that the expand and innovation popping out of the property sector through initiatives enjoy the Wild Coast sun net Zero consume certification proves to the relaxation of the world that they can certainly attach sustainability and environmental considerations at the coronary heart of how they design, construct, and operate more desirable, greener buildings and precincts - congratulations to sun international for demonstrating Amazing environmental management," spoke of Manfred Braune, GBCSA managing govt: sector structure and transformation, following the announcement.

As fraction of their sustainability event, solar international has launched into an aggressive Zero-Waste-to-Landfill initiative to subsist achieved with the aid of the conclude of 2020 in any respect its South African devices. Wild Coast solar is the first unit in the neighborhood to obtain this goal. Jennifer van Niekerk of GCX, the accepted skilled who carried out the web Zero Certification defined, "The Wild Coast solar’s consume administration fashion comprises the composting of biological consume onsite, recycling of recyclables by skill of accepted recyclers, donation and resale of reusable gadgets and the manufacturing of bricks from non-effective non-recyclable waste."

Brick manufacturing and recycling is performed offsite with the counsel of a consume contractor, despite the fact extensive measures maintain been attach in region to in the reduction of, reuse, sever and treat 70% of the consume produced on site.

"Our zero consume to landfill project is just one of many initiatives we're enforcing. The triple advantage of decreasing and changing consume into a useful useful resource is that they achieve their dedication to subsist environmentally responsible, they succor the local economic climate via job introduction, and they minimise the repercussion on their basis line. I convene that a win-win-win situation," introduced head of sustainability at sun overseas Jannette Horn.

Green buildings must  conclude more to fix their climate emergency

green buildings exigency to conclude greater to fix their local weather emergency

After greater than three many years of talk concerning the potential of structure eco-friendly, now they maintain nevertheless failed to change the style they design and assemble constructions...

Meg Holden and Rebecca Holt 6 Feb 2019

As an necessary step within the success of their zero consume to landfill solution, the Wild Coast sun has placed giant accent on the separation of biological consume at source in any its personal kitchens. It has supported, knowledgeable and helped develop a full-time business to pick up rid of biological consume from the kitchens and benevolent the consume to remove any contaminants by using hand. a different enterprise, furthermore expert and assisted by means of the Wild Coast sun, then composts the organic consume and makes utilize of it in an onsite vegetable backyard, the submit from which is sold lower back to the hotel for utilize within the kitchens. An extra requirement of the certification, the Wild Coast sun were required to meet privilege here criteria: attach in coerce onsite consume recycling, conduct ordinary consume rush audits of ongoing consumables and maintain an up-to-date operational consume and substances management plan.

"Waste should quiet now not subsist seen as something to subsist disposed and as a cost - it's going to subsist considered as a resource. Landfill websites are filling up, and they must attach together for a complete shift in thinking around waste. it is a no-brainer that green constructing, including consume minimisation and reuse, is not any longer a lofty top of the line on the continent and the leisure of the world, they are able to now notice the tangible merits that are tied to sustainability from an African context and the undeniable fact that within a number of years the South African business anticipates that they are going to maintain a lots larger degree of green structure recreation is fascinating," referred to Braune.


Wild Coast solar inn achieves net Zero consume ranking | killexams.com real Questions and Pass4sure dumps

hotel and inns community sun overseas has develop into the first business in Africa to obtain a eco-friendly structure Council of South Africa (GBCSA) net Zero consume score for an bold recycling ail at its Wild Coast solar property, in Port Edward.

The award is the first of its kind within the nation and, although the Wild Coast sun became already sending zero consume to landfill via the conclusion of 2016, the verification system required one full 12 months’s information earlier than it may well subsist licensed.

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The GBCSA achieved the standards procedure at the conclude of 2017, after which an exterior audit of the information changed into done in 2018 by artery of environmental consultancy company GCX.

To subsist regarded for the award, an operational consume and materials administration procedure vital to subsist introduced and applied on site. The Wild Coast sun had to submit to regular audits and, to subsist valuable within the long run, educational workshops and seminars had been used to create attention amongst personnel.

commercial

solar international first brought plans to dispose of consume sent to landfill in 2015, and goals to eventually achieve zero consume to landfill in any respect of its South African homes. The business aims to subsist a frontrunner in consume administration within the local hospitality trade by encouraging suppliers, contractors and concessionaires to introduce identical consume saving initiatives at their operations.

due to the fact January 2017, the Wild Coast solar has recycled 600 t/y of waste. “not most effective will this succor to give protection to the pristine Wild Coast ambiance, it's additionally developing jobs for the local neighborhood.

“The challenge now sustains two permanent commercial enterprise structure projects. Gayo corporations, headed by means of Aben Mbabala, employs seven people who're accountable for amassing and separating meals waste, cartridges, paper, cardboard and batteries,” sun international cited.  

The 2d enterprise structure venture, Vuka Uzenzele trading, is managed through Alex Nzimakwe, who employs 5 people to provide compost from meals consume and backyard cuttings, and plant and manage fresh organic vegetable gardens.

The compost yard covers about 70 m and produced 187 t of compost in 2018. This translated into a saving of R430 000 for compost, which the lodge had to previously purchase to maintain its golf path and gardens.

organic greens grown in the backyard, which is cultivated with the additional compost being produced, saves the lodge and restaurants about R10 000 a month in submit costs. excess greens are furthermore donated to aboriginal faculties for their soup kitchens, with one school by myself feeding as many as 900 toddlers a day.

most plastic consume is recycled, while other used substances comparable to inn furniture, computers, appliances and linen are donated to needy aboriginal communities and establishments akin to hospitals.

Non-recyclable consume is used to fabricate eco-bricks by artery of the unit’s appointed recycling carrier issuer based mostly in Port Edward. This, in flip, has created additional jobs within the area to cope with the about forty t of consume that the Wild Coast sun used to ship to landfill every month.

In 2018, Wild Coast solar changed into the recipient of the Eco-logic Recycling and consume management Award. speakme about the award, solar alien protection, health and environmental officer Sonja Stroud mentioned the enterprise’s approach to sustainability is holistic.

“To obtain their zero consume train they needed to scrutinise each ingredient of their operation on the Wild Coast. the 1st step became to conclude away with skips and compactors and to style the consume on site.

“Now, recycling and repurposing consume lessens their environmental footprint and additionally assists americans alive in the communities [where] they conclude company via donations of physical items, excess food from their gardens and the creation of fresh enterprise and employment opportunities.”


Have Insiders Been selling solar Pharma superior research business confined (NSE:SPARC) Shares? | killexams.com real Questions and Pass4sure dumps

We’ve lost weigh number of how many times insiders maintain accrued shares in an organization that goes on to help markedly. alas, there are additionally a variety of examples of participate fees declining precipitously after insiders maintain offered shares. So we’ll pick a glance at no matter if insiders had been buying or selling shares in sun Pharma advanced research enterprise restricted (NSE:SPARC).

what's Insider promoting?

Most traders comprehend that it's rather permissible for business leaders, comparable to directors of the board, to purchase and sell inventory in the marketplace. although, most nations require that the business discloses such transactions to the market.

We don’t suppose shareholders may quiet with no distress celebrate insider transactions. but first-rate judgment dictates subsist sure you pay some attention to whether insiders are buying or promoting shares. as an instance, a Columbia school dissect institute that ‘insiders are more likely to interact in open market purchases of their personal business’s inventory when the firm is ready to parade fresh agreements with customers and suppliers’.

take a notice at their newest evaluation for sun Pharma advanced research

sun Pharma advanced research Insider Transactions Over The remaining yr

Jayant Sanghvi made the largest insider sale in the ultimate 365 days. That solitary transaction become for ₹99m value of shares at a value of ₹398 each and every. whereas the sale doesn’t upshot us mediate confident, they conclude word it become carried out at a value well above the existing participate fee, which is ₹178. So it's difficult to draw any mighty conclusion from it. Jayant Sanghvi become the simplest individual insider to sell shares within the ultimate twelve months.

Jayant Sanghvi divested 305.99k shares over the ultimate twelve months at a regular cost of ₹395. The chart below indicates insider transactions (by using individuals) over the final yr. with the aid of clicking on the graph under, you can notice the genuine details of each insider transaction!

NSEI:SPARC recent Insider buying and selling, March 2nd 2019

extra

when you are enjoy me, then you will now not are looking to leave out this free record of growing companies that insiders are purchasing.

Does solar Pharma superior research crow inordinate Insider possession?

Many investors want to determine how tons of a corporation is owned by means of insiders. They continually enjoy to notice relatively inordinate stages of insider ownership. It looks that sun Pharma superior analysis insiders own 14% of the enterprise, worth about ₹6.4b. whereas here's a robust however now not dazzling stage of insider possession, it’s sufficient to argue some alignment between management and smaller shareholders.

So What conclude The sun Pharma advanced analysis Insider Transactions point out?

There haven’t been any insider transactions within the ultimate three months — that doesn’t imply a whole lot. It’s tremendous to peer inordinate ranges of insider ownership, however looking returned on the remaining 12 months, they don’t gain self credit from the solar Pharma superior research insiders promoting. to attach this in context, pick a glance at how a company has performed in the past. that you can entry this exact graph of past profits, revenue and money stream .

if you would prefer to try a different enterprise — one with doubtlessly advanced financials — then conclude not omit this free checklist of unique organizations, which maintain inordinate revert on equity and low debt.

We objective to carry you lengthy-time term focused research analysis driven through simple information. celebrate that their analysis can furthermore no longer aspect in the latest price-delicate business announcements or qualitative material.

in case you spot an error that warrants correction, tickle contact the editor at editorial-crew@simplywallst.com. this text via quite simply Wall St is accepted in nature. It does not depict a suggestion to buy or sell any inventory, and doesn't pick account of your pursuits, or your pecuniary situation. with no distress Wall St has no position within the shares outlined. thanks for studying.


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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 detailed runbooks.

Like this article? They recommend 

This article is a practical steer 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 gain of availability requirements by presenting two-, three-, and four-disk configurations. Every additional disk adds protection. The view is to select one configuration, based on the cost/benefit ratio in a given situation, then utilize the corresponding runbook as a steer for implementation. The SUNBEsdm package is furthermore provided with scripts for a fully automatic implementation.

In this document, they result the concepts of the Sun BluePrints_ reserve "Boot Disk Management—A steer for the Solaris_ Operating Environment" by John S. Howard and David Deeths. They add an categorical comparison of the utilize 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 situation 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 great number of disks and rational 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 preference is not obvious at first sight because both Solaris Volume Manager software and VxVM software work perfectly under predictable circumstances. The contrast becomes pellucid in case of cataclysm (defined in this context as a situation where, due to some problem, the system no longer boots).

    It is not the objective 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 familiar to many people, who often scholarly them the difficult way, but they maintain not institute them to subsist formally documented.

  • Make life easier for the Solaris Volume Manager software user by providing runbooks with the commands detailed and the correct sequences provided. An engineer who routinely installs systems may not exigency this information, but they believe that there is a great audience who can profit 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 first-rate practice. Because a carelessly partitioned system disk may cause considerable trouble, they dedicate a sever section in this article to discussing the rationale of the /, /var, and swap partitioning.


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

    One of the driving forces behind the high-tail to storage area networks (SANs) has been the increasing consequence and size of enterprise databases. As databases grew, administrators institute that the only artery to efficiently manage and expand database storage is to tap into the flexibility of SANs. However, with the expanded utilize of databases on storage networks, storage administrators now must deal with fresh performance, backup, restore and management issues-not to mention how to pick up 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 badge that database vendors are increasingly vigilant of how Important 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 first-rate customer experience, they are teaming with their key OS, server hardware and storage partners to provide a remote advocate strategy, aligned between us and their partners."

    At this time, Oracle's partners comprise 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 high-tail from DAS to SANs. The reasons: increased ease and quicken 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 reason they looked at storage area networks was the challenge of sharing great storage subsystems." In addition, he says, "It wasn't just a distance limitation, but furthermore real estate. With SCSI, they institute 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 furthermore seen this, and says, "Database users are very focused on scaling up and scaling out, which you can't conclude with dedicated storage."

    Bob Rogers, chief storage architect at BMC says, "Consistent even of performance is driving people to storage area networks, as are better attribute backup and recovery tools. Those are any very sturdy motivators to proceed to a SAN environment, which is why very great customers maintain embraced SANs and attach databases on them quite early."

    Jim Booth, director of systems engineering at CreekPath, agrees, saying, "People are poignant to SANs primarily to pick up the performance. You can certainly implement a database on either NAS or a SAN. However, if you're doing it on a SAN, you pick up 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 sever 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 firm which helps companies manage their systems, works with a great 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 maintain two copies of the OLTP database-one is a replicated acute tangy standby, " says Leo. The systems flee Computer Associates' Ingres database.

    "To back up the database, they are using the SAN for disk-to-disk backups. They then utilize Veritas' NetBackup and a sever backup LAN to backup the SAN. To manage the disk space on the Sun, they utilize 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 captious for recovering a database if there's a failure and are furthermore used for replicating databases. Many databases can furthermore utilize their own aboriginal file systems to maximize performance, maintain control over tables and avoid potential performance penalties imposed by file system buffering. Aside from snappily storage, CPU and memory, administrators maintain paid a lot of attention to balancing quicken vs. redundancy of data.

    Database and storage administrators maintain 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 significantly 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 conditional upon how you configure the SAN. They maintain seen very first-rate performance for databases with RAID 1+0 kind configurations. They maintain furthermore 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 maintain to furthermore upshot sure that tables and logs never participate the identical spindles on a disk. John Eisenschmidt, a DBA at the American Association for the Advancement of Science, Washington, D.C., says for his ultimate install of Oracle, "We made sure not to attach the index tablespaces with the data tablespaces to help read performance, and attach 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 quiet runs his databases on raw dedicated disk.

    However, with the advent of SANs and virtualized storage, administrators no longer maintain 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 captious issue, however, most disks today are virtualized-and users don't maintain a clue where things are physically located."

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

    Enter virtualizationDespite virtualization's even march into storage systems, most vendors and users mediate that some control is quiet needed to fully optimize database access. Oracle's Hoke says, "One of the magnificient nefarious things that can betide with virtualization is that you can maintain two tables related in your business application, with a high even of traffic in unavoidable rows of those tables."

    One artery to Dramatically expand Database Performance Question: "Have you gain across some difficult numbers and performance figures for the utilize of RAID (at any level) in the database environment?"Securing PDAs with sensitive data - or access to it - should subsist taken seriously. Basically, you exigency to apply the identical 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. reckon 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%, any without even touching the back conclude I/O. Never fling hardware at a needy design as the revert on investment is never as first-rate as taking the time to rethink the original design.Here's the some things to conclude for first-rate I/O performance:1) utilize a lot of spindles. If you proceed to and notice at the specifications on the designs to achieve maximum database performance, you'll notice they utilize hundreds of drives. By a lot of spindles, I don't subsist of value great RAID sets. You should concatenate many smaller RAID sets into a solitary LUN either by using host software or LUN virtualization within the storage hardware, if it has that capability.2) utilize 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 betide at a time. Using dual-pathed Fibre disks, you can maintain a read command on one side and a write command on the other side of the disk being queued at the identical time.3) Spread the I/O load as much as possible. utilize many HBAs in the server that are load balancing your I/O across any the paths. Tools enjoy Veritas' Volume Manager or Solstice Disk Suite can succor conclude this by creating a solitary LUN from many spindles on each path. By using 2Gb paths and four HBAs, you can pick up immediate to 800MB/sec to the LUN.4) utilize 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 difficult 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 quicken (15,000 RPM is better than 7,200 RPM of course) and maximum hunt latency. If you partition your RAID set into tiny partitions, and locate your data on the outer cylinders, your performance will proceed up substantially. Doing this reduces the hunt time for a particular partition. Now just add up the number of spindles to pattern out your maximum IOPS. pattern 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 obscure size of the transfer will either expand MB per second (throughput) or IOPS. Smaller blocks upshot IOPS proceed up, larger blocks upshot throughput proceed up.These numbers are for direct I/O, signification no cache in front of the drives. Adding cache can expand performance dramatically. I maintain seen 33,000 IOPS on a solitary LUN during 100% cache hit. So, if you want the best I/O performance available, utilize 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 first-rate database administrator will try to spread those tables across multiple devices, so he doesn't create hotspots, and furthermore for availability. However, with virtualization, those two tables may subsist inadvertently placed on the identical disk, because virtualization masks physical locations. "Virtualization is powerful for provisioning storage because it's smooth to high-tail 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 quiet absolutely Important with a SAN, although disks maintain gotten faster. It quiet comes down to laying down data on a spinning disk, and not putting redo logs and indexes on the identical physical drives. That's why it's Important for tools to notice any the artery 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 mediate administrators exigency to subsist directly concerned with where data is, "DBAs don't exigency to subsist considered about which spindle disk data lies on. They pick keeping of that for them. Their rational volumes allow them to high-tail data around on-the- coast to adjust hotspots, even while running." Other vendors are furthermore announcing tools in this area.

    Durnford sees things the identical way. "Using JBOD, you're much more sensitive to placements [hotspots]. However, using storage arrays, they utilize their technology to high-tail storage around while running to purge hotspots, so that the server doesn't really exigency 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 ancient days of NFS [network file systems], due to want 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 enjoy 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 maintain not identified anything needing validation."

    However, it quiet takes some work to pick up SANs performing privilege 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, enjoy 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 pick up 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 identical SAN."

    Caribou Lake's Leo agrees, saying, "SANs often rescue 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 sever storage networks to solve some of these problems. He says, "For tape, we're looking at a sever tape SAN. The issue there is database traffic is very time-sensitive, where tape traffic is very backup-oriented. Though you might mediate it's time shifted, we've institute there's overlap."

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

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

    CreekPath's Booth furthermore agrees, saying that while heedful tuning of how storage is configured can purge sharing issues, "Both DBAs and storage administrators exigency to subsist on the identical page."

    Despite the issues, some users maintain had powerful 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 maintain 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 fling it on the SAN." Brooks attributes the want of issues to the relationship he has with his storage vendors. He says, "We conclude a lot of research, primarily in the interoperability area that might account for the want of issues. They work very closely with their storage vendors to ensure certification and supportability of the environment, in case issues conclude arise."

    Tools and techniquesBecause SANs' fresh role as the primary storage for databases, there's now a exigency 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 utensil to track why a SAN partition was configured in a unavoidable way, thus preventing the loss of historically significant details when SAN management changes hands," says DBA Leo.

    "If I could maintain anything from a SAN to upshot it better for a database, I'd query the vendors to write better drivers. Most of the drivers I've seen and worked with just Tell 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 seem to subsist listening and are increasingly focusing their efforts on getting their database to flee better on SANs, and their storage and infrastructure to better advocate 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 difficult initiative, EMC's Oracle Double Checksum utensil offers the skill 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 furthermore announced advocate for the initiative, with a microcode-based verification of Oracle data in their Lightning 9900V product.

    EMC furthermore offers its Symmetrix Optimizer, which makes recommendations to administrators on where to rebalance data-a must for administrators looking for acute tangy 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 maintain 12 to 15 engineers inside Oracle, some dedicated to interoperability, and the repose to feature exploitation such as their Double Checksum product and integration between Oracle and their replication products."

    Veritas furthermore 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 any the artery from a database environment in Oracle or Exchange, through files, any the artery down to disks to parade 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 notice where it is spread about. They can expose that through a topology manager-all of the connections, solitary points of failure, and the artery the database is laid out on disk."

    Despite complexities of managing databases running on storage networks, the benefits are clear. For great 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 artery to advocate their mission captious 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 upshot their products work better together (see "Vendor independence: Are the trade-offs worth it?").



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