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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 cognomen : Sun Certified Data Management Engineer with Solstice DiskSuite Software
Vendor cognomen : SUN
real questions : 150 actual Questions

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SUN Sun Certified Data Management

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

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

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

"we are delighted that the multiply and innovation popping out of the property sector through initiatives relish the Wild Coast sun net Zero blow certification proves to the relaxation of the world that they can certainly allot 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 incredible environmental management," spoke of Manfred Braune, GBCSA managing govt: sector building and transformation, following the announcement.

As portion of their sustainability event, solar international has launched into an aggressive Zero-Waste-to-Landfill initiative to breathe achieved with the aid of the halt 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 blow administration method comprises the composting of biological blow 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 blow contractor, despite the fact extensive measures acquire been allot in region to in the reduction of, reuse, divorce and treat 70% of the blow produced on site.

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

Green buildings must finish more to fix their climate emergency

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

After greater than three many years of talk concerning the potential of building eco-friendly, now they acquire 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 blow to landfill solution, the Wild Coast sun has placed giant stress on the separation of biological blow at source in everyone its personal kitchens. It has supported, knowledgeable and helped develop a full-time industry to regain rid of biological blow from the kitchens and benign the blow to remove everyone contaminants by using hand. a different enterprise, likewise skilled and assisted by means of the Wild Coast sun, then composts the organic blow and makes disburse of it in an onsite vegetable backyard, the yield from which is sold lower back to the hotel for disburse within the kitchens. An extra requirement of the certification, the Wild Coast sun were required to answer prerogative here criteria: allot in constrain onsite blow recycling, conduct ordinary blow tide audits of ongoing consumables and acquire an up-to-date operational blow and substances management plan.

"Waste should noiseless now not breathe seen as something to breathe disposed and as a cost - it's going to breathe considered as a resource. Landfill websites are filling up, and they must allot together for a complete shift in thinking around waste. it is a no-brainer that green constructing, including blow 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 descry 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 industry anticipates that they are going to acquire a lots larger degree of green building recreation is fascinating," referred to Braune.


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

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

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

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

To breathe regarded for the award, an operational blow and materials administration design vital to breathe introduced and applied on site. The Wild Coast sun had to submit to regular audits and, to breathe 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 blow sent to landfill in 2015, and goals to eventually achieve zero blow to landfill in any respect of its South African homes. The industry aims to breathe a frontrunner in blow administration within the local hospitality trade by encouraging suppliers, contractors and concessionaires to introduce identical blow saving initiatives at their operations.

due to the fact January 2017, the Wild Coast solar has recycled 600 t/y of waste. “not most efficient will this embolden 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 building 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 building venture, Vuka Uzenzele trading, is managed through Alex Nzimakwe, who employs 5 people to provide compost from meals blow and backyard cuttings, and plant and manage novel 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 yield costs. excess greens are likewise donated to autochthonous faculties for their soup kitchens, with one school by myself feeding as many as 900 toddlers a day.

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

Non-recyclable blow is used to fabricate eco-bricks by pass of the unit’s appointed recycling carrier issuer based mostly in Port Edward. This, in flip, has created additional jobs within the zone to cope with the about forty t of blow 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 blow management Award. speakme about the award, solar foreign protection, health and environmental officer Sonja Stroud mentioned the enterprise’s approach to sustainability is holistic.

“To obtain their zero blow flush they needed to scrutinise each component of their operation on the Wild Coast. the 1st step became to finish away with skips and compactors and to style the blow on site.

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


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

We’ve lost import number of how many times insiders acquire accrued shares in an organization that goes on to better markedly. alas, there are additionally a variety of examples of share fees declining precipitously after insiders acquire offered shares. So we’ll win 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 industry leaders, comparable to directors of the board, to purchase and sell inventory in the marketplace. although, most nations require that the industry discloses such transactions to the market.

We don’t suppose shareholders may noiseless with no difficulty solemnize insider transactions. but proper judgment dictates breathe sure you pay some attention to whether insiders are buying or promoting shares. as an instance, a Columbia school anatomize establish that ‘insiders are more likely to interact in open market purchases of their personal business’s inventory when the solid is ready to parade novel agreements with customers and suppliers’.

take a searchfor 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 last 365 days. That separate transaction become for ₹99m value of shares at a value of ₹398 each and every. whereas the sale doesn’t invent us deem confident, they finish word it become carried out at a value well above the existing share fee, which is ₹178. So it's arduous 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 last twelve months at a regular price 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 descry the genuine details of each insider transaction!

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

extra

when you are relish 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 unreasonable Insider possession?

Many investors want to determine how tons of a corporation is owned by means of insiders. They continually relish to descry relatively unreasonable 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 enough to indicate some alignment between management and smaller shareholders.

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

There haven’t been any insider transactions within the last three months — that doesn’t imply a all lot. It’s tremendous to peer unreasonable 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 allot this in context, win 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 finish not omit this free checklist of unique organizations, which acquire unreasonable revert on equity and low debt.

We object to carry you lengthy-time term focused research analysis driven through simple information. solemnize that their analysis can likewise no longer aspect in the latest price-delicate industry announcements or qualitative material.

in case you spot an error that warrants correction, gladden contact the editor at editorial-crew@simplywallst.com. this text via quite simply Wall St is accepted in nature. It does not limn a suggestion to buy or sell any inventory, and doesn't win account of your pursuits, or your financial situation. with no difficulty 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 actual 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 pilot 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 achieve of availability requirements by presenting two-, three-, and four-disk configurations. Every additional disk adds protection. The conception is to select one configuration, based on the cost/benefit ratio in a given situation, then disburse the corresponding runbook as a pilot for implementation. The SUNBEsdm package is likewise provided with scripts for a fully automatic implementation.

In this document, they ensue the concepts of the Sun BluePrints_ reserve "Boot Disk Management—A pilot for the Solaris_ Operating Environment" by John S. Howard and David Deeths. They add an express comparison of the disburse 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 status 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 breathe 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 ratiocinative volumes and can breathe 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 selection is not obvious at first sight because both Solaris Volume Manager software and VxVM software travail perfectly under predictable circumstances. The inequity becomes plain 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 object of this document to provide an absolute best drill 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 erudite them the arduous way, but they acquire not establish them to breathe 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 exigency this information, but they believe that there is a great audience who can capitalize from some assistance in this area. They assume some flush 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 proper practice. Because a carelessly partitioned system disk may occasions considerable trouble, they dedicate a divorce 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 actual questions and Pass4sure dumps

    One of the driving forces behind the rush to storage zone networks (SANs) has been the increasing weight and size of enterprise databases. As databases grew, administrators establish that the only pass to efficiently manage and expand database storage is to tap into the flexibility of SANs. However, with the expanded disburse of databases on storage networks, storage administrators now must deal with novel performance, backup, restore and management issues-not to mention how to regain 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 cognizant of how vital 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 thrust 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 towering flush 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 proper customer experience, they are teaming with their key OS, server hardware and storage partners to provide a remote champion strategy, aligned between us and their partners."

    At this time, Oracle's partners involve 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, towering volume databases.

    Today, database applications are starting to rush from DAS to SANs. The reasons: increased ease and hasten 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 zone networks was the challenge of sharing great storage subsystems." In addition, he says, "It wasn't just a distance limitation, but likewise actual estate. With SCSI, they establish 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 likewise seen this, and says, "Database users are very focused on scaling up and scaling out, which you can't finish with dedicated storage."

    Bob Rogers, chief storage architect at BMC says, "Consistent flush of performance is driving people to storage zone networks, as are better attribute backup and recovery tools. Those are everyone very tenacious motivators to proceed to a SAN environment, which is why very great customers acquire embraced SANs and allot databases on them quite early."

    Jim Booth, director of systems engineering at CreekPath, agrees, saying, "People are moving to SANs primarily to regain the performance. You can certainly implement a database on either NAS or a SAN. However, if you're doing it on a SAN, you regain consistent throughput. Though it might breathe 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 divorce 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 solid 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 acquire two copies of the OLTP database-one is a replicated burning 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 disburse Veritas' NetBackup and a divorce backup LAN to backup the SAN. To manage the disk space on the Sun, they disburse 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 censorious for recovering a database if there's a failure and are likewise used for replicating databases. Many databases can likewise disburse their own autochthonous file systems to maximize performance, maintain control over tables and avoid potential performance penalties imposed by file system buffering. Aside from likeaflash storage, CPU and memory, administrators acquire paid a lot of attention to balancing hasten vs. redundancy of data.

    Database and storage administrators acquire 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 rather 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 relative upon how you configure the SAN. They acquire seen very proper performance for databases with RAID 1+0 sort configurations. They acquire likewise 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 breathe down."

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

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

    Luckily, the hasten and manageability of storage acquire improved the situation, despite the loss in control. Rogers says, "Today, you can regain a much more consistent flush 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 equable march into storage systems, most vendors and users deem that some control is noiseless needed to fully optimize database access. Oracle's Hoke says, "One of the gigantic outrageous things that can occur with virtualization is that you can acquire two tables related in your industry application, with a towering flush of traffic in inescapable rows of those tables."

    One pass to Dramatically multiply Database Performance Question: "Have you near across some arduous numbers and performance figures for the disburse of RAID (at any level) in the database environment?"Securing PDAs with sensitive data - or access to it - should breathe taken seriously. Basically, you exigency to apply the selfsame rigor to PDA security that you would to any other enterprise-class device, with a transparent security policy and a uniform suite of security software. reckon the following:Chris Poelker: Database application performance shouldn't only breathe 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 moving to SQL - stored procedures at the database level, and tuning the indexing methods - and a slight schema redesign-performance improved by over 800%, everyone without even touching the back halt I/O. Never pitch hardware at a impecunious design as the revert on investment is never as proper as taking the time to rethink the original design.Here's the some things to finish for proper I/O performance:1) disburse a lot of spindles. If you proceed to and searchfor at the specifications on the designs to achieve maximum database performance, you'll notice they disburse hundreds of drives. By a lot of spindles, I don't carryweight great RAID sets. You should concatenate many smaller RAID sets into a separate LUN either by using host software or LUN virtualization within the storage hardware, if it has that capability.2) disburse low latency paths to storage. Fibre Channel uses a packet-based network, which allows for a plenary duplex backend. On a SCSI bus, only one thing can occur at a time. Using dual-pathed Fibre disks, you can acquire a read command on one side and a write command on the other side of the disk being queued at the selfsame time.3) Spread the I/O load as much as possible. disburse many HBAs in the server that are load balancing your I/O across everyone the paths. Tools relish Veritas' Volume Manager or Solstice Disk Suite can embolden finish this by creating a separate LUN from many spindles on each path. By using 2Gb paths and four HBAs, you can regain immediate to 800MB/sec to the LUN.4) disburse the proper RAID flush for the log and database. Best drill here is log files should breathe on RAID 0+1 (RAID 10) and databases on RAID5 (RAID 0+1 can breathe 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 hasten (15,000 RPM is better than 7,200 RPM of course) and maximum search latency. If you partition your RAID set into miniature partitions, and locate your data on the outer cylinders, your performance will proceed up substantially. Doing this reduces the search time for a particular partition. Now just add up the number of spindles to device out your maximum IOPS. device 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 breathe less). Changing the obscure size of the transfer will either multiply MB per second (throughput) or IOPS. Smaller blocks invent IOPS proceed up, larger blocks invent throughput proceed up.These numbers are for direct I/O, import no cache in front of the drives. Adding cache can multiply performance dramatically. I acquire seen 33,000 IOPS on a separate LUN during 100% cache hit. So, if you want the best I/O performance available, disburse 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 proper database administrator will try to spread those tables across multiple devices, so he doesn't create hotspots, and likewise for availability. However, with virtualization, those two tables may breathe inadvertently placed on the selfsame disk, because virtualization masks physical locations. "Virtualization is much for provisioning storage because it's facile to rush 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 noiseless absolutely vital with a SAN, although disks acquire gotten faster. It noiseless comes down to laying down data on a spinning disk, and not putting redo logs and indexes on the selfsame physical drives. That's why it's vital for tools to descry everyone the pass 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 deem administrators exigency to breathe directly concerned with where data is, "DBAs don't exigency to breathe considered about which spindle disk data lies on. They win care of that for them. Their ratiocinative volumes allow them to rush data around on-the- wing to adjust hotspots, even while running." Other vendors are likewise announcing tools in this area.

    Durnford sees things the selfsame way. "Using JBOD, you're much more sensitive to placements [hotspots]. However, using storage arrays, they disburse their technology to rush storage around while running to eradicate 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 traditional 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 relish 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 acquire not identified anything needing validation."

    However, it noiseless takes some travail to regain 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, relish 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 regain 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 selfsame SAN."

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

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

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

    CreekPath's Booth likewise agrees, epigram that while watchful tuning of how storage is configured can eradicate sharing issues, "Both DBAs and storage administrators exigency to breathe on the selfsame page."

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

    Tools and techniquesBecause SANs' novel 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 breathe nice if vendors could provide some sort of management utensil to track why a SAN partition was configured in a inescapable way, thus preventing the loss of historically significant details when SAN management changes hands," says DBA Leo.

    "If I could acquire anything from a SAN to invent it better for a database, I'd inquire the vendors to write better drivers. Most of the drivers I've seen and worked with just parade 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 breathe listening and are increasingly focusing their efforts on getting their database to flee better on SANs, and their storage and infrastructure to better champion 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 breathe 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 utensil offers the talent 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 likewise announced champion for the initiative, with a microcode-based verification of Oracle data in their Lightning 9900V product.

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

    Veritas likewise offers a host of products designed to travail 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 everyone the pass from a database environment in Oracle or Exchange, through files, everyone the pass down to disks to note 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, separate points of failure, and the pass 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 flush of performance, consistency, redundancy, and scalability that a storage network provides. Storage and database administrators alike are finding that the only pass to champion their mission censorious applications is to deploy their databases on a storage network. With so much at stake, storage and database vendors will continue to travail more in tandem to invent their products travail better together (see "Vendor independence: Are the trade-offs worth it?").



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