310-102 exam Dumps Source : Sun Certified Data Management Engineer with Solstice DiskSuite Software
Test Code : 310-102
Test designation : Sun Certified Data Management Engineer with Solstice DiskSuite Software
Vendor designation : SUN
braindumps : 150 existent Questions
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solar international's Wild Coast solar has executed Africa's first web Zero fritter rating from the green constructing Council of South Africa (GBCSA).
"we are delighted that the extend and innovation popping out of the property sector through initiatives affection the Wild Coast sun net Zero fritter certification proves to the relaxation of the world that they can certainly set 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 astounding environmental management," spoke of Manfred Braune, GBCSA managing govt: sector pile and transformation, following the announcement.
As piece of their sustainability event, solar international has launched into an aggressive Zero-Waste-to-Landfill initiative to live 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 fritter administration routine comprises the composting of biological fritter 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 fritter contractor, despite the fact extensive measures believe been set in region to in the reduction of, reuse, divide and deal 70% of the fritter produced on site.
"Our zero fritter to landfill project is just one of many initiatives we're enforcing. The triple handicap of decreasing and changing fritter into a useful useful resource is that they achieve their dedication to live environmentally responsible, they mitigate the local economic climate via job introduction, and they minimise the repercussion on their groundwork line. I convoke that a win-win-win situation," introduced head of sustainability at sun overseas Jannette Horn.
green buildings need to attain greater to fix their local weather emergency
After greater than three many years of talk concerning the potential of pile eco-friendly, now they believe nevertheless failed to change the style they design and assemble constructions...
Meg Holden and Rebecca Holt 6 Feb 2019As an necessary step within the success of their zero fritter to landfill solution, the Wild Coast sun has placed giant accent on the separation of biological fritter at source in vulgar its personal kitchens. It has supported, knowledgeable and helped develop a full-time business to procure rid of biological fritter from the kitchens and kind the fritter to remove vulgar contaminants by using hand. a different enterprise, too skilled and assisted by means of the Wild Coast sun, then composts the organic fritter and makes exhaust of it in an onsite vegetable backyard, the bear from which is sold lower back to the hotel for exhaust within the kitchens. An extra requirement of the certification, the Wild Coast sun were required to fullfil prerogative here criteria: set in constrain onsite fritter recycling, conduct ordinary fritter current audits of ongoing consumables and believe an up-to-date operational fritter and substances management plan.
"Waste should silent now not live seen as something to live disposed and as a cost - it's going to live considered as a resource. Landfill websites are filling up, and they must set together for a complete shift in thinking around waste. it is a no-brainer that green constructing, including fritter 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 contemplate 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 believe a lots larger degree of green pile recreation is fascinating," referred to Braune.
hotel and inns community sun overseas has develop into the first business in Africa to obtain a eco-friendly pile Council of South Africa (GBCSA) net Zero fritter score for an bold recycling application 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 fritter to landfill via the conclusion of 2016, the verification system required one replete 12 months’s information earlier than it may well live licensed.
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 pass of environmental consultancy company GCX.
To live regarded for the award, an operational fritter and materials administration device vital to live introduced and applied on site. The Wild Coast sun had to submit to regular audits and, to live 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 fritter sent to landfill in 2015, and goals to eventually achieve zero fritter to landfill in any respect of its South African homes. The business aims to live a frontrunner in fritter administration within the local hospitality trade by encouraging suppliers, contractors and concessionaires to insert identical fritter 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 mitigate 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 pile 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 pile venture, Vuka Uzenzele trading, is managed through Alex Nzimakwe, who employs 5 people to provide compost from meals fritter and backyard cuttings, and plant and manage original 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 bear costs. excess greens are too donated to endemic faculties for their soup kitchens, with one school by myself feeding as many as 900 toddlers a day.
most plastic fritter is recycled, while other used substances comparable to inn furniture, computers, appliances and linen are donated to needy endemic communities and establishments akin to hospitals.
Non-recyclable fritter 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 locality to cope with the about forty t of fritter 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 fritter 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 fritter aim they needed to scrutinise each ingredient of their operation on the Wild Coast. the 1st step became to attain away with skips and compactors and to style the fritter on site.
“Now, recycling and repurposing fritter lessens their environmental footprint and additionally assists americans living in the communities [where] they attain company via donations of physical items, excess food from their gardens and the creation of original enterprise and employment opportunities.”
We’ve lost count number of how many times insiders believe 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 believe offered shares. So we’ll catch 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 silent with no anguish keep insider transactions. but advantageous judgment dictates live confident you pay some attention to whether insiders are buying or promoting shares. as an instance, a Columbia school dissect organize that ‘insiders are more likely to interact in open market purchases of their personal business’s inventory when the firm is ready to array original agreements with customers and suppliers’.
take a view at their newest evaluation for sun Pharma advanced researchsun Pharma advanced research Insider Transactions Over The remaining yr
Jayant Sanghvi made the largest insider sale in the ultimate 365 days. That sole transaction become for ₹99m value of shares at a value of ₹398 each and every. whereas the sale doesn’t beget us contemplate confident, they attain word it become carried out at a value well above the existing participate fee, which is ₹178. So it's hard 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 charge 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 contemplate the genuine details of each insider transaction!
NSEI:SPARC recent Insider buying and selling, March 2nd 2019extra
when you are affection 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 inordinate Insider possession?
Many investors want to determine how tons of a corporation is owned by means of insiders. They continually affection to contemplate 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 betoken some alignment between management and smaller shareholders.So What attain 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 all lot. It’s tremendous to peer inordinate ranges of insider ownership, however looking returned on the remaining 12 months, they don’t gain self belief from the solar Pharma superior research insiders promoting. to set this in context, catch 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 attain not omit this free checklist of unique organizations, which believe inordinate revert on equity and low debt.
We end to carry you lengthy-time period focused research analysis driven through simple information. keep that their analysis can too no longer aspect in the latest price-delicate business announcements or qualitative material.
in case you spot an mistake that warrants correction, gratify contact the editor at firstname.lastname@example.org. this text via quite simply Wall St is accepted in nature. It does not portray a suggestion to buy or sell any inventory, and doesn't catch account of your pursuits, or your monetary situation. with no anguish Wall St has no position within the shares outlined. thanks for studying.
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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 minute runbooks.Like this article? They recommend
This article is a practical guide 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 scope 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 exhaust the corresponding runbook as a guide for implementation. The SUNBEsdm package is too provided with scripts for a fully automatic implementation.
In this document, they supervene the concepts of the Sun BluePrints_ bespeak "Boot Disk Management—A guide for the Solaris_ Operating Environment" by John S. Howard and David Deeths. They add an categorical comparison of the exhaust 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:
System disk partitioning
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 live 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 analytic volumes and can live 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 work perfectly under predictable circumstances. The contrast 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 end 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 hard way, but they believe not organize them to live formally documented.
Make life easier for the Solaris Volume Manager software user by providing runbooks with the commands minute and the reform sequences provided. An engineer who routinely installs systems may not need 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 advantageous practice. Because a carelessly partitioned system disk may antecedent considerable trouble, they dedicate a divide section in this article to discussing the rationale of the /, /var, and swap partitioning.
One of the driving forces behind the slouch to storage locality networks (SANs) has been the increasing consequence and size of enterprise databases. As databases grew, administrators organize that the only pass to efficiently manage and expand database storage is to tap into the flexibility of SANs. However, with the expanded exhaust of databases on storage networks, storage administrators now must deal with original performance, backup, restore and management issues-not to mention how to procure along with the database administrators (DBAs). Here's what storage administrators should know about marrying a database to a SAN.Oracle's Storage Push In a note that database vendors are increasingly alert of how necessary 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 lofty 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 advantageous customer experience, they are teaming with their key OS, server hardware and storage partners to provide a remote support 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, lofty volume databases.
Today, database applications are starting to slouch from DAS to SANs. The reasons: increased ease and accelerate of backup, better scalability, as well as enhanced reliability and performance. For many applications, a SAN is the only option available that provides the required performance.
Harold Durnford, a storage administrator at Royal Bank Canada, Toronto, Canada, says, "We've had Oracle, Sybase, UDB, and Informix on a SAN for quite some time. The intuition they looked at storage locality networks was the challenge of sharing great storage subsystems." In addition, he says, "It wasn't just a distance limitation, but too existent estate. With SCSI, they organize 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 too seen this, and says, "Database users are very focused on scaling up and scaling out, which you can't attain with dedicated storage."
Bob Rogers, chief storage architect at BMC says, "Consistent even of performance is driving people to storage locality networks, as are better property backup and recovery tools. Those are vulgar very strong motivators to slouch to a SAN environment, which is why very great customers believe embraced SANs and set databases on them quite early."
Jim Booth, director of systems engineering at CreekPath, agrees, saying, "People are touching to SANs primarily to procure the performance. You can certainly implement a database on either NAS or a SAN. However, if you're doing it on a SAN, you procure consistent throughput. Though it might live 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 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 believe two copies of the OLTP database-one is a replicated fiery standby, " says Leo. The systems shun Computer Associates' Ingres database.
"To back up the database, they are using the SAN for disk-to-disk backups. They then exhaust Veritas' NetBackup and a divide backup LAN to backup the SAN. To manage the disk space on the Sun, they exhaust 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 too used for replicating databases. Many databases can too exhaust their own endemic file systems to maximize performance, maintain control over tables and avoid potential performance penalties imposed by file system buffering. Aside from hastily storage, CPU and memory, administrators believe paid a lot of attention to balancing accelerate vs. redundancy of data.
Database and storage administrators believe 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 partially 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 believe seen very advantageous performance for databases with RAID 1+0 character configurations. They believe too 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 live down."
To further optimize access times and data throughput, database administrators believe to too beget confident that tables and logs never participate the very 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 confident not to set the index tablespaces with the data tablespaces to improve read performance, and set 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 silent runs his databases on raw dedicated disk.
However, with the advent of SANs and virtualized storage, administrators no longer believe 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 believe a clue where things are physically located."
Luckily, the accelerate and manageability of storage believe improved the situation, despite the loss in control. Rogers says, "Today, you can procure 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 steady march into storage systems, most vendors and users contemplate that some control is silent needed to fully optimize database access. Oracle's Hoke says, "One of the substantial tainted things that can happen with virtualization is that you can believe two tables related in your business application, with a lofty even of traffic in unavoidable rows of those tables."One pass to Dramatically extend Database Performance Question: "Have you promote across some hard numbers and performance figures for the exhaust of RAID (at any level) in the database environment?"Securing PDAs with sensitive data - or access to it - should live taken seriously. Basically, you need to apply the very rigor to PDA security that you would to any other enterprise-class device, with a clear security policy and a uniform suite of security software. regard the following:Chris Poelker: Database application performance shouldn't only live 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 vigorous 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 touching to SQL - stored procedures at the database level, and tuning the indexing methods - and a slight schema redesign-performance improved by over 800%, vulgar without even touching the back conclude I/O. Never sling hardware at a poor design as the revert on investment is never as advantageous as taking the time to rethink the original design.Here's the some things to attain for advantageous I/O performance:1) exhaust a lot of spindles. If you slouch to and view at the specifications on the designs to achieve maximum database performance, you'll notice they exhaust hundreds of drives. By a lot of spindles, I don't import great 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) exhaust low latency paths to storage. Fibre Channel uses a packet-based network, which allows for a replete duplex backend. On a SCSI bus, only one thing can happen at a time. Using dual-pathed Fibre disks, you can believe a read command on one side and a write command on the other side of the disk being queued at the very time.3) Spread the I/O load as much as possible. exhaust many HBAs in the server that are load balancing your I/O across vulgar the paths. Tools affection Veritas' Volume Manager or Solstice Disk Suite can mitigate attain this by creating a sole LUN from many spindles on each path. By using 2Gb paths and four HBAs, you can procure near to 800MB/sec to the LUN.4) exhaust the proper RAID even for the log and database. Best drill here is log files should live on RAID 0+1 (RAID 10) and databases on RAID5 (RAID 0+1 can live used on the database for better performance if your budget allows for it).Performance. Today's hard 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 accelerate (15,000 RPM is better than 7,200 RPM of course) and maximum quest latency. If you partition your RAID set into minute partitions, and locate your data on the outer cylinders, your performance will slouch up substantially. Doing this reduces the quest 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 live less). Changing the shroud size of the transfer will either extend MB per second (throughput) or IOPS. Smaller blocks beget IOPS slouch up, larger blocks beget throughput slouch up.These numbers are for direct I/O, import no cache in front of the drives. Adding cache can extend performance dramatically. I believe seen 33,000 IOPS on a sole LUN during 100% cache hit. So, if you want the best I/O performance available, exhaust 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 advantageous database administrator will try to spread those tables across multiple devices, so he doesn't create hotspots, and too for availability. However, with virtualization, those two tables may live inadvertently placed on the very disk, because virtualization masks physical locations. "Virtualization is Great for provisioning storage because it's effortless to slouch data and add disks. But with a database, because of performance issues, there are potential drawbacks," Hoke says.
CreekPath's Booth agrees: "File placement is silent absolutely necessary with a SAN, although disks believe gotten faster. It silent comes down to laying down data on a spinning disk, and not putting redo logs and indexes on the very physical drives. That's why it's necessary for tools to contemplate vulgar 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 contemplate administrators need to live directly concerned with where data is, "DBAs don't need to live considered about which spindle disk data lies on. They catch keeping of that for them. Their analytic volumes allow them to slouch data around on-the- sail to adjust hotspots, even while running." Other vendors are too announcing tools in this area.
Durnford sees things the very way. "Using JBOD, you're much more sensitive to placements [hotspots]. However, using storage arrays, they exhaust their technology to slouch storage around while running to eliminate hotspots, so that the server doesn't really need 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 archaic 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 affection 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 believe not identified anything needing validation."
However, it silent takes some work to procure 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, affection 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 procure 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 very SAN."
Caribou Lake's Leo agrees, saying, "SANs often redeem 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 decipher 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 contemplate it's time shifted, we've organize 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 ultimate yoke years, but most system administrators want SANs that are easier to administrate. I want a more reliable SAN whose caching I'm not unafraid to circle on," Eisenshmidt says.
Leo says that when you set a database and storage together, "You realize that your SAN management team must work closely with the DBMS team. They believe seen situations where SAN managers believe decided to change the SAN configuration because it seems wasteful or odd, not realizing how carefully tuned the setup was."
CreekPath's Booth too agrees, aphorism that while careful tuning of how storage is configured can eliminate sharing issues, "Both DBAs and storage administrators need to live on the very page."
Despite the issues, some users believe had Great 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 believe no issues with running on a SAN. Not even performance issues. It just seems to run," he says. Asked if he does anything special for databases, he says "For SQL and Oracle databases, they sling it on the SAN." Brooks attributes the lack of issues to the relationship he has with his storage vendors. He says, "We attain a lot of research, primarily in the interoperability locality that might account for the lack of issues. They work very closely with their storage vendors to ensure certification and supportability of the environment, in case issues attain arise."
Tools and techniquesBecause SANs' original role as the primary storage for databases, there's now a need for improved tools and software to manage the combination of database applications and storage. "It would live nice if vendors could provide some sort of management instrument 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 believe anything from a SAN to beget it better for a database, I'd interrogate the vendors to write better drivers. Most of the drivers I've seen and worked with just command 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 look to live listening and are increasingly focusing their efforts on getting their database to shun better on SANs, and their storage and infrastructure to better support 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 live 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 hard initiative, EMC's Oracle Double Checksum instrument offers the competence to verify Oracle data as it is written to arrays in microcode, ensuring that corrupted data is never written to disk. Competitor Hitachi Data Systems has too announced support for the initiative, with a microcode-based verification of Oracle data in their Lightning 9900V product.
EMC too offers its Symmetrix Optimizer, which makes recommendations to administrators on where to rebalance data-a must for administrators looking for fiery spindles. EMC has a near partnership with Oracle, including a dedicated engineering team at Oracle Redwood Shores. Chuck Hollis, EMC's vice president of products and markets says, "We believe 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 too 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 vulgar the pass from a database environment in Oracle or Exchange, through files, vulgar the pass down to disks to prove 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 contemplate where it is spread about. They can expose that through a topology manager-all of the connections, sole 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 even of performance, consistency, redundancy, and scalability that a storage network provides. Storage and database administrators alike are finding that the only pass to support their mission faultfinding applications is to deploy their databases on a storage network. With so much at stake, storage and database vendors will continue to work more in tandem to beget their products work better together (see "Vendor independence: Are the trade-offs worth it?").
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