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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 title : Sun Certified Data Management Engineer with Solstice DiskSuite Software
Vendor title : SUN
: 150 existent Questions

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SUN Sun Certified Data Management

Wild Coast sun achieves first-in-Africa web Zero squander certification | existent Questions and Pass4sure dumps

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

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

"we are delighted that the expand and innovation popping out of the property sector through initiatives infatuation the Wild Coast sun net Zero squander certification proves to the relaxation of the world that they can certainly assign 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 wonderful environmental management," spoke of Manfred Braune, GBCSA managing govt: sector edifice and transformation, following the announcement.

As fraction of their sustainability event, solar international has launched into an aggressive Zero-Waste-to-Landfill initiative to be achieved with the aid of the End 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 squander administration mode comprises the composting of biological squander 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 recommendation of a squander contractor, despite the fact extensive measures acquire been assign in region to in the reduction of, reuse, divide and deal 70% of the squander produced on site.

"Our zero squander to landfill project is just one of many initiatives we're enforcing. The triple edge of decreasing and changing squander into a useful useful resource is that they achieve their dedication to be environmentally responsible, they wait on the local economic climate via job introduction, and they minimise the repercussion on their base line. I convene 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 requisite to finish greater to fix their local weather emergency

After greater than three many years of talk concerning the potential of edifice 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 squander to landfill solution, the Wild Coast sun has placed giant accent on the separation of biological squander at source in all its personal kitchens. It has supported, knowledgeable and helped develop a full-time traffic to accept rid of biological squander from the kitchens and kindhearted the squander to remove all contaminants by using hand. a different enterprise, furthermore proficient and assisted by means of the Wild Coast sun, then composts the organic squander and makes expend of it in an onsite vegetable backyard, the succumb from which is sold lower back to the hotel for expend within the kitchens. An extra requirement of the certification, the Wild Coast sun were required to satisfy privilege here criteria: assign in force onsite squander recycling, conduct ordinary squander stream audits of ongoing consumables and acquire an up-to-date operational squander and substances management plan.

"Waste should still now not be seen as something to be disposed and as a cost - it's going to be considered as a resource. Landfill websites are filling up, and they must assign together for a complete shift in thinking around waste. it is a no-brainer that green constructing, including squander 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 survey 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 traffic anticipates that they are going to acquire a lots larger degree of green edifice recreation is fascinating," referred to Braune.

Wild Coast solar inn achieves net Zero squander ranking | existent Questions and Pass4sure dumps

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

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


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

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


solar international first brought plans to dispose of squander sent to landfill in 2015, and goals to eventually achieve zero squander to landfill in any respect of its South African homes. The traffic aims to be a frontrunner in squander administration within the local hospitality trade by encouraging suppliers, contractors and concessionaires to interject identical squander 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 wait on 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 edifice 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 edifice venture, Vuka Uzenzele trading, is managed through Alex Nzimakwe, who employs 5 people to provide compost from meals squander and backyard cuttings, and plant and manage unusual 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 succumb costs. excess greens are furthermore donated to autochthonous faculties for their soup kitchens, with one school by myself feeding as many as 900 toddlers a day.

most plastic squander 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 squander is used to fabricate eco-bricks by way 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 squander 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 squander management Award. speakme about the award, solar exotic protection, health and environmental officer Sonja Stroud mentioned the enterprise’s approach to sustainability is holistic.

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

“Now, recycling and repurposing squander 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 unusual enterprise and employment opportunities.”

Have Insiders Been selling solar Pharma superior research traffic confined (NSE:SPARC) Shares? | existent Questions and Pass4sure dumps

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

We don’t suppose shareholders may still with no wretchedness solemnize insider transactions. but splendid judgment dictates be certain you pay some attention to whether insiders are buying or promoting shares. as an instance, a Columbia school resolve create that ‘insiders are more likely to interact in open market purchases of their personal business’s inventory when the difficult is ready to pomp unusual agreements with customers and suppliers’.

take a glimpse 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 eventual 365 days. That sole transaction become for ₹99m value of shares at a value of ₹398 each and every. whereas the sale doesn’t perform us cogitate confident, they finish 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 eventual 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 survey the genuine details of each insider transaction!

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


when you are infatuation 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 brag excessive Insider possession?

Many investors want to determine how tons of a corporation is owned by means of insiders. They continually infatuation to survey relatively excessive 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 betoken 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 eventual three months — that doesn’t imply a all lot. It’s tremendous to peer excessive 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 assign this in context, tangle 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 excessive revert on equity and low debt.

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

in case you spot an error that warrants correction, delight contact the editor at 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 tangle account of your pursuits, or your financial situation. with no wretchedness 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 | existent 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 sheperd 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 view is to select one configuration, based on the cost/benefit ratio in a given situation, then expend the corresponding runbook as a sheperd for implementation. The SUNBEsdm package is furthermore provided with scripts for a fully automatic implementation.

In this document, they supervene the concepts of the Sun BluePrints_ book "Boot Disk Management—A sheperd for the Solaris_ Operating Environment" by John S. Howard and David Deeths. They add an specific comparison of the expend 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 be 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 large number of disks and logical volumes and can be 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 option is not obvious at first sight because both Solaris Volume Manager software and VxVM software travail perfectly under predictable circumstances. The disagreement becomes divide in case of disaster (defined in this context as a situation where, due to some problem, the system no longer boots).

    It is not the goal of this document to provide an absolute best rehearse 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 difficult way, but they acquire not create them to be formally documented.

  • Make life easier for the Solaris Volume Manager software user by providing runbooks with the commands circumstantial and the remedy sequences provided. An engineer who routinely installs systems may not requisite this information, but they believe that there is a large 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 splendid practice. Because a carelessly partitioned system disk may cause 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 | existent questions and Pass4sure dumps

    No result found, try unusual keyword!Company's PCE335-HSI WAN Communications Adapter has achieved Solaris(tm) Ready Certification ... that are optimized to meet Sun requirements and standards for product excellence," said Cynthia Hardenb...

    Get top performance from database storage | existent questions and Pass4sure dumps

    One of the driving forces behind the paddle to storage area networks (SANs) has been the increasing import and size of enterprise databases. As databases grew, administrators create that the only way to efficiently manage and expand database storage is to tap into the flexibility of SANs. However, with the expanded expend of databases on storage networks, storage administrators now must deal with unusual performance, backup, restore and management issues-not to mention how to accept 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 sensible 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 propel 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 elevated 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 splendid 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 include 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, elevated volume databases.

    Today, database applications are starting to paddle 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 judgement they looked at storage area networks was the challenge of sharing large storage subsystems." In addition, he says, "It wasn't just a distance limitation, but furthermore existent estate. With SCSI, they create 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 finish 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 quality backup and recovery tools. Those are all very tenacious motivators to retract to a SAN environment, which is why very large customers acquire embraced SANs and assign databases on them quite early."

    Jim Booth, director of systems engineering at CreekPath, agrees, saying, "People are stirring to SANs primarily to accept the performance. You can certainly implement a database on either NAS or a SAN. However, if you're doing it on a SAN, you accept consistent throughput. Though it might be 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 difficult which helps companies manage their systems, works with a large 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 spicy standby, " says Leo. The systems elude Computer Associates' Ingres database.

    "To back up the database, they are using the SAN for disk-to-disk backups. They then expend Veritas' NetBackup and a divide backup LAN to backup the SAN. To manage the disk space on the Sun, they expend 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 furthermore used for replicating databases. Many databases can furthermore expend their own autochthonous file systems to maximize performance, maintain control over tables and avoid potential performance penalties imposed by file system buffering. Aside from rapidly storage, CPU and memory, administrators acquire paid a lot of attention to balancing quicken 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 by a long shot 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 contingent upon how you configure the SAN. They acquire seen very splendid performance for databases with RAID 1+0 character configurations. They acquire 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 be down."

    To further optimize access times and data throughput, database administrators acquire to furthermore perform certain 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 eventual install of Oracle, "We made certain not to assign the index tablespaces with the data tablespaces to improve read performance, and assign 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 still runs his databases on raw dedicated disk.

    However, with the advent of SANs and virtualized storage, administrators no longer acquire 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 acquire a clue where things are physically located."

    Luckily, the quicken and manageability of storage acquire improved the situation, despite the loss in control. Rogers says, "Today, you can accept a much more consistent even of performance by going to very large 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 cogitate that some control is still needed to fully optimize database access. Oracle's Hoke says, "One of the astronomical injurious things that can chance with virtualization is that you can acquire two tables related in your traffic application, with a elevated even of traffic in certain rows of those tables."

    One way to Dramatically expand Database Performance Question: "Have you Come across some difficult numbers and performance figures for the expend of RAID (at any level) in the database environment?"Securing PDAs with sensitive data - or access to it - should be taken seriously. Basically, you requisite to apply the identical rigor to PDA security that you would to any other enterprise-class device, with a lucid security policy and a uniform suite of security software. reckon the following:Chris Poelker: Database application performance shouldn't only be 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 dynamic 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 stirring to SQL - stored procedures at the database level, and tuning the indexing methods - and a slight schema redesign-performance improved by over 800%, all without even touching the back End I/O. Never fling hardware at a impoverished design as the revert on investment is never as splendid as taking the time to rethink the original design.Here's the some things to finish for splendid I/O performance:1) expend a lot of spindles. If you retract to and glimpse at the specifications on the designs to achieve maximum database performance, you'll notice they expend hundreds of drives. By a lot of spindles, I don't import large RAID sets. You should concatenate many smaller RAID sets into a sole LUN either by using host software or LUN virtualization within the storage hardware, if it has that capability.2) expend low latency paths to storage. Fibre Channel uses a packet-based network, which allows for a complete duplex backend. On a SCSI bus, only one thing can chance 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 identical time.3) Spread the I/O load as much as possible. expend many HBAs in the server that are load balancing your I/O across all the paths. Tools infatuation Veritas' Volume Manager or Solstice Disk Suite can wait on finish this by creating a sole LUN from many spindles on each path. By using 2Gb paths and four HBAs, you can accept nigh to 800MB/sec to the LUN.4) expend the proper RAID even for the log and database. Best rehearse here is log files should be on RAID 0+1 (RAID 10) and databases on RAID5 (RAID 0+1 can be 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 quest latency. If you partition your RAID set into miniature partitions, and locate your data on the outer cylinders, your performance will retract up substantially. Doing this reduces the quest time for a particular partition. Now just add up the number of spindles to motif out your maximum IOPS. motif 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 be less). Changing the obstruct size of the transfer will either expand MB per second (throughput) or IOPS. Smaller blocks perform IOPS retract up, larger blocks perform throughput retract up.These numbers are for direct I/O, significance no cache in front of the drives. Adding cache can expand performance dramatically. I acquire seen 33,000 IOPS on a sole LUN during 100% cache hit. So, if you want the best I/O performance available, expend a solid-state disk.Christopher Poelker is a storage architect at Hitachi Data Systems. He answers readers' questions on "Ask the Expert" at

    According to Hoke, a splendid 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 be inadvertently placed on the identical disk, because virtualization masks physical locations. "Virtualization is stately for provisioning storage because it's effortless to paddle 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 still absolutely Important with a SAN, although disks acquire gotten faster. It still 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 survey all the way 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 cogitate administrators requisite to be directly concerned with where data is, "DBAs don't requisite to be considered about which spindle disk data lies on. They tangle confidence of that for them. Their logical volumes allow them to paddle data around on-the- flee 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 expend their technology to paddle 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 passe days of NFS [network file systems], due to lack 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 infatuation 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 still takes some travail to accept 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, infatuation 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 accept 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 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 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 cogitate it's time shifted, we've create 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 couple 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 eddy on," Eisenshmidt says.

    Leo says that when you assign 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 furthermore agrees, maxim that while watchful tuning of how storage is configured can purge sharing issues, "Both DBAs and storage administrators requisite to be on the identical page."

    Despite the issues, some users acquire had stately 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 fling it on the SAN." Brooks attributes the lack of issues to the relationship he has with his storage vendors. He says, "We finish a lot of research, primarily in the interoperability area that might account for the lack 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' unusual 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 be nice if vendors could provide some sort of management implement to track why a SAN partition was configured in a certain 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 perform it better for a database, I'd request the vendors to write better drivers. Most of the drivers I've seen and worked with just reveal 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 be listening and are increasingly focusing their efforts on getting their database to elude 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 be 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 implement 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 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 spicy spindles. EMC has a nigh 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 furthermore 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 all the way from a database environment in Oracle or Exchange, through files, all the way down to disks to pomp 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 survey where it is spread about. They can expose that through a topology manager-all of the connections, sole points of failure, and the way the database is laid out on disk."

    Despite complexities of managing databases running on storage networks, the benefits are clear. For large 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 way to advocate 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 travail more in tandem to perform their products travail better together (see "Vendor independence: Are the trade-offs worth it?").

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