Free 310-152 Text Books of Killexams.com | study guide | Braindumps | Study Guides | Textbook
Learn our 310-152 practice questions and 310-152 braindumps - Questions and Answers - cheatsheets and pass 310-152 exam with high score These Q&A are sufficient to pass 310-152 at first attempt - study guide - Study Guides | Textbook
Pass4sure 310-152 dumps | Killexams.com 310-152 real questions | https://www.textbookw.com/
I feel very assured via getting ready 310-152 current dumps.
I passed this exam with killexams.com and own currently received my 310-152 certificates. I did All my certifications with killexams.com, so I cant examine what its fancy to engage an exam with/without it. Yet, the verity that I preserve coming back for their bundles suggests that Im satisfied with this exam answer. I esteem being able to exercise on my pc, inside the consolation of my domestic, especially whilst the enormous majority of the questions appearing on the exam are exactly the equal what you noticed to your exam simulator at home. Thanks to killexams.com, I got as much as the Professional degree. I am no longer positive whether Ill subsist shifting up any time quickly, as I seem to subsist lighthearted where I am. Thanks Killexams.
Dont waste your time on searching internet, just cross for those 310-152 Questions and solutions.
When I was getting organized up for my 310-152 , It become very stressful to select the 310-152 study dump. I determined killexams.com while googling the property certification sources. I subscribed and noticed the wealth of resources on it and used it to reserve together for my 310-152 test. I clear it and Im so thankful to this killexams.com.
real 310-152 test questions! i used to subsist no longer watching for such shortcut.
killexams.com is the most nice pass i own ever lengthy beyond over to come by geared up and skip IT checks. I desiremore people thought approximately it. But then, there is probably greater risks someone must nigh it down. The constituent is, it provides for the same problem what I should grasp for an exam. Whats more I imply various IT test, 310-152 with 88% marks. My companion utilized killexams.com for lots special certificates, All terrific and big. In reality stable, my individual top alternatives.
I want actual engage a sight at questions today's 310-152 exam.
Outstanding insurance of 310-152 exam ideas, so I scholarly precisely what I desired for the duration of the 310-152 exam. I particularly endorse this training from killexams.com to All people planning to engage the 310-152 exam.
Get these s and scurry to vacations to reserve together.
I retained the equal wide variety of as I ought to. A marks of 89% changed into a first rate foster approximately for my 7-day making plans. My making plans of the exam 310-152 was sad, because the issues own been excessively vehement for me to come by it. for speedy reference I emulated the killexams.com dumps aide and it gave notable backing. the fast-period answershad been decently clarified in basic dialect. plenty preferred.
it's miles proper source to find 310-152 dumps paper.
I passed the 310-152 exam ultimate week and fully relied on this sell off from killexams.com for my coaching. that is a fantasticmanner to come by certified as foster what may the questions foster from the actual pool of exam questions utilized by dealer. This way, almost All questions I were given at the exam seemed familiar, and i knew solutions to them. this is very dependable and honest, in particular given their money again guarantee (i own a chum who foster what may failed an Architect degree exam and were given his money again, so that is for actual).
What is needed to sight at and pass 310-152 examination?
I used to subsist a lot idle and didnt want to expertise travail difficult and usually searched quick cuts and convenient strategies. While i used to subsist doing an IT course 310-152 and it halt up very tough for me and didnt able to find out any pilot line then i heard aboutthe web web page which own been very well-known within the market. I got it and my issues removed in few days while Icommenced it. The pattern and exercise questions helped me lots in my prep of 310-152 tests and i efficiently secured top marks as rightly. That became surely due to the killexams.
Did you tried this notable source present day 310-152 intelligence dumps.
killexams.com Dumps web page helped me come by get privilege of entry to to diverse exam schooling material for 310-152 exam. I was careworn that which one I want to select out, but your specimens helped me pick the super one. I purchased killexams.com Dumps direction, which notably helped me view All of the crucial ideas. I solved All questions in due time. I am absolutely contented to own killexams.com as my tutor. An terrible lot desired
got no trouble! three days schooling trendy 310-152 real exam questions is required.
that is my first time that I took this provider. I feel very confident in 310-152 but. I reserve together my 310-152 the consume of questions and answers with exam simulator softare via killexams.com team.
it's miles splendid to own 310-152 dumps.
I purchased this because of the 310-152 questions, I thought I could enact the QAs fraction just based on my prior experience. Yet, the 310-152 questions provided by killexams.com were just as useful. so you really exigency targeted prep materials, I passed easily, All thanks to killexams.com.
Taiwan-based cooling answer developer Yen solar know-how will view its flowers in Dongguan quickly enter pilot creation for certification by means of its motor vehicle seller client and start mass construction in April with optimum means to achieve over one million gadgets a month. The web site may subsist particularly used to meet orders from China, while flowers in southern Taiwan should subsist serving consumers from Europe, the us and Japan, based on Robert Liu, universal manager of Yen solar's digital Cooling Division.
Yen sun registered consolidated revenues of NT$290 million (US$9.33 million) for January, rising 17.seventy five% on year. on account of fewer working hours as a result of the Lunar fresh year vacation trips, the company expects the amount to slip on month in February, however to pick on up in March. Some market watchers forecast Yen solar's first-quarter consolidated revenues to achieve a fresh quarterly checklist with contributions from cooling and residential appliance items.
Yen solar is planning to expand means at vegetation in southern Taiwan and has built fresh flowers in Dongguan, China to fulfill claim from the car sector.
Liu brought up that carriers are turning to focus of attention on designing cars with lighter weight and less dash consumption and the approach is anticipated to set off a wave of claim for heat dissipation options. Yen sun's visibility of such orders has already reached the conclusion of 2019 and the enterprise is already starting to design automobiles with customers for the subsequent three years.
presently, Yen solar has 65% of its revenues contributed by means of its cooling answer products with the repose coming from home appliance items. Of the revenues from cooling solutions, 38% are from automobile cooling and others workstation cooling.
currently, the flowers in southern Taiwan are capable of accomplish 120,000 contraptions of cooling fanatics a month and the company is looking to raise the quantity to 300,000 contraptions before the halt of the primary half.
published on February fifteenth, 2019 | by Nicolas Zart
February 15th, 2019 by using Nicolas Zart
And it’s off to an excellent birth for the solar Flyer 2 and its Siemens electric motor. The electric powered plane (e-plane) effectively achieved its first sight at various flight with the brand fresh electric motor.
Bye Aerospace has been busy the past few years furiously working on this e-aircraft, so the executives engineers own to subsist over the moon about the electric solar Flyer 2 completing its first respectable flight on February eight at the Centennial Airport, south of Denver, Colorado.
above all, Bye Aerospace is focusing its flight checking out on its propulsion equipment, envelope expansion, and techniques optimization. it is using a fifty seven lb Siemens SP70D electric motor, which has a max dash of 89.5 kW (a hundred and twenty HP) and a perpetual dash atmosphere of as much as 70 kW (94 HP).
Bye Aerospace is setting up a few plane within the sun Flyer household — a 2-seat sun Flyer 2 and a four-seat sun Flyer 4, as they in the past said. The company wants to construct the first FAA-licensed, functional, all-electric powered airplanes to serve the flight practicing and common aviation markets.
Bye Aerospace competes with one more e-plane maker, Pipistrel, which has its Alpha Electro. dwell tuned for an interview with Pipistrel pros, as well as electric powered flight leaders at Bye Aerospace and Siemens.
The FAA gave the solar Flyer 2 a ways 23 certification closing year in 2018. Bye Aerospace will continue checking out of the solar Flyer 2 prototype through 2019.
related to this examine flight, in line with George E. Bye, CEO of Bye Aerospace: “The airplane performed exactly as planned. My due to the total Siemens crew for their participation as they enter this subsequent, essential flight check section of sun Flyer 2 with the Siemens electric propulsion device.”
The company too has 2 different projects, the Stratoairnet, a solar-electric powered Unmanned Aerial automobile (UAV) and the uncommunicative Falcon UAV developed by uncommunicative Falcon u.s.a.applied sciences which you can find privilege here.
Siemens’ swank position in the electric Aviation business
Siemens and its electric motors play a immense role in the electric powered aviation world, a docile deal fancy Bosch pushed alongside the electric powered bicycle (e-bike) world. Siemens has already verified 260 kW electric motors earlier than on European e-planes. The definitely respectable news is that it’s establishing propulsion technology with a whopping 10MW of energy, for commercial electric plane for the aviation transport sector. to this point, Siemens electric motors own set at the least two velocity facts — the primary aero tow via an electrical plane and a fresh world climb checklist with an altitude of three,000 meters in 4 minutes and 22 seconds.
Dr. straightforward Anton, government vice chairman and Head of eAircraft, Siemens delivered:
“This successful sight at various flight is a supercilious second for the Siemens and Bye Aerospace teams and marks a milestone in bringing the age of electric powered flight to life. The Siemens electric powered propulsion tackle offers a clear, cost-effective and uncommunicative propulsion option to the flight training market devoid of compromising performance or safeguard.”
electric Airplanes Are closer Than You think
The electric vehicle (EV) rEVolution has been significantly underway for the past decade, but generally focused on land-certain motors. The maritime and aviation industries are now working extra significantly on the electrification of vessels and plane, however in a unique approach from the automotive industry. but don’t subsist fooled just because you don’t yet view a Tesla plane — Bye Aerospace and a yoke of other electric flight pioneers are bringing electric powered urban air mobility near us.
by the consume of Flying mag
Tags: Bosch, Bye AEROSPACE, electric powered airplanes, electric flight, electric powered flight records, electric powered flight precipitate record, a ways 23 certification, George E. Bye, Pipistrel, Pipistrel Alpha Electro, siemens, Siemens electric powered motor, sun Flyer 2, sun Flyer four
concerning the creator
Nicolas Zart Nicolas changed into born and raised around classic vehicles of the 1920s, however it wasn't until he drove an AC Propulsion eBox and a Tesla Roadster that the effortless went on. Ever considering that he has produced eco-friendly mobility content on numerous CleanTech retailers considering the fact that 2007 and organize his home on CleanTechnica. His communication ardour resulted in cowl electric automobiles, self reliant vehicles, renewable energy, examine drives, podcasts, shoot pictures, and film for various exotic retailers in print and online. Nicolas offers an in-depth seem at the e-mobility world via interviews and the numerous contacts he has solid in those industries. His favourite taglines are: "There are more options than barriers." and "the day before today's Future Now"
The assignment represents solar light & power’s capability to bring colossal, intricate projects in difficult environments.
Berkeley, CA, February 19, 2019 --(PR.com)-- California’s pioneer photo voltaic company, sun mild & vigour, has efficaciously completed the setting up of a 905kWp solar array atop the fresh lengthy-term parking garage at San Francisco overseas Airport.
sun mild & vigour worked with SFO, Nibbi Brothers conventional Contractors and photo voltaic panel manufacturer REC photo voltaic whose panels had been purchased for the system.
The solar array is one in All a few at San Francisco Airport with a purpose to uphold the organization movement against a extra sustainable future. The intent of the array is to offset the airport’s carbon footprint and to retailer the airport funds by using cutting back claim electricity costs throughout height usage times.
The greenhouse gas emissions offset by means of the gadget equals 915 metric lots of CO2 each and every year. this is similar to the greenhouse gas emissions from 1,000,000 lbs. of coal and is the equivalent of disposing of the emissions from 194 passenger cars.*
sun gentle & energy built a sturdy group including MLB energy and Liberty electric powered of San Mateo to advertise the utilization and participation of local organizations on this San Francisco Airport contract.
solar gentle & power’s Chief operating Officer, Troy Tyler, mentioned, “we are chuffed to aid San Francisco international Airport deliver electricity, create smartly-paying jobs and in the reduction of the carbon impact of one of the busiest airports in the world. that you can view the array from the parkway in the event you drive by. So, we’ll own a pass of pride when seeing it for many years to come.”
From initial contract signing to titanic completion, the undertaking took 14 months to complete, in parallel with development of the parking storage.
About solar mild & power
For over forty years, solar light & power has delivered superb customer service by means of designing and building exorbitant fine photo voltaic thermal and photo voltaic dash techniques across California. solar light & power’s team of worker-house owners serve a immense compass of commercial, nonprofit, municipal and residential customers. solar effortless & energy is one of the first organizations in the condition to develop into included as a profit organization (referred to as a B Corp), and it's one of Alameda County’s first licensed eco-friendly businesses. sun gentle & energy became a hundred% employee owned (ESOP) in 2018. For more counsel, dispute with www.SunLightandPower.com.
About REC community:established in Norway in 1996, REC neighborhood is a number one vertically built-in solar power business. via integrated manufacturing from silicon to wafers, cells, tremendous panels and lengthening to solar solutions, REC community gives the world with a professional source of antiseptic power. REC’s prominent product pleasant is supported via the lowest guarantee claims cost in the business. REC group is a Bluestar Elkem company with headquarters in Norway and operational headquarters in Singapore. REC group employs 2,000 people international, producing 1.5 GW of solar panels yearly.
Media Contact sun effortless & power:Nancy Summersnsummers@sunlightandpower.comMobile or text: 813-335-4756www.sunlightandpower.com
Media Contact REC community:Melissa WatsonMelissa.Watson@recgroup.comwww.recgroup.com
image caption: The solar array installed atop the parking garage at San Francisco exotic Airport with the aid of sun light & vigour elements REC solar panels.
Obviously it is arduous assignment to pick solid certification questions/answers assets concerning review, reputation and validity since individuals come by sham because of picking incorrectly benefit. Killexams.com ensure to serve its customers best to its assets concerning exam dumps update and validity. The vast majority of other's sham report objection customers foster to us for the brain dumps and pass their exams cheerfully and effectively. They never trade off on their review, reputation and property because killexams review, killexams reputation and killexams customer certitude is vital to us. Uniquely they deal with killexams.com review, killexams.com reputation, killexams.com sham report grievance, killexams.com trust, killexams.com validity, killexams.com report and killexams.com scam. In the event that you view any fraudulent report posted by their rivals with the title killexams sham report grievance web, killexams.com sham report, killexams.com scam, killexams.com dissension or something fancy this, simply remember there are constantly terrible individuals harming reputation of docile administrations because of their advantages. There are a distinguished many fulfilled clients that pass their exams utilizing killexams.com brain dumps, killexams PDF questions, killexams hone questions, killexams exam simulator. Visit Killexams.com, their specimen questions and test brain dumps, their exam simulator and you will realize that killexams.com is the best brain dumps site.
310-152 Dumps and exercise programming with real Question killexams.com SUN Certification study guides are setup via IT experts. Most people complaint that there are an examcollection of questions in this nature of giant quantity of education exams and exam resource, and they may subsist these days can not afford to manage the fee of any extra. Seeing killexams.com experts training session this a ways reaching rendition while nevertheless assurance that every one the getting to know is secured after profound research and exam.
Just bear their questions bank and sense assured just about the 310-152 exam. you will pass your test at tall marks or refund. they own got aggregative information of 310-152 Dumps from actual exam so you will subsist able to foster back with an opportunity to induce prepared and pass 310-152 exam on the first attempt. Merely install their test engine and acquire prepared. you will pass the test.
killexams.com Discount Coupons and Promo Codes are as under;
WC2017 : 60% Discount Coupon for All tests on website
PROF17 : 10% Discount Coupon for Orders larger than $69
DEAL17 : 15% Discount Coupon for Orders over $99
SEPSPECIAL : 10% Special Discount Coupon for All Orders
Detail is at http://killexams.com/pass4sure/exam-detail/310-152
High property 310-152 products: they own their experts Team to ensure their SUN 310-152 exam questions are always the latest. They are All very intimate with the exams and testing center.
How they retain SUN 310-152 exams updated?: they own their special ways to know the latest exams information on SUN 310-152. Sometimes they contact their partners who are very intimate with the testing focus or sometimes their customers will email us the most recent feedback, or they got the latest feedback from their dumps market. Once they find the SUN 310-152 exams changed then they update them ASAP.
Money back guarantee?: if you really fail this 310-152 Sun Certified Backup and Recovery Engineer (emphasis on Solstice Backup) and don’t want to wait for the update then they can give you replete refund. But you should transmit your score report to us so that they can own a check. They will give you replete refund immediately during their working time after they come by the SUN 310-152 score report from you.
SUN 310-152 Sun Certified Backup and Recovery Engineer (emphasis on Solstice Backup) Product Demo?: they own both PDF version and Software version. You can check their software page to view how it looks like.
killexams.com Huge Discount Coupons and Promo Codes are as under;
WC2017 : 60% Discount Coupon for All exams on website
PROF17 : 10% Discount Coupon for Orders greater than $69
DEAL17 : 15% Discount Coupon for Orders greater than $99
DECSPECIAL : 10% Special Discount Coupon for All Orders
When will I come by my 310-152 material after I pay?: Generally, After successful payment your username/password are sent at your email address within 5 min. But if there is any delay in bank side for payment authorization, then it takes minute longer.
310-152 Practice Test | 310-152 examcollection | 310-152 VCE | 310-152 study guide | 310-152 practice exam | 310-152 cram
No result found, try fresh keyword!And now modern world however, the emphasis is lamentable to using premium burning alternative ... these facilities own demanding power needs including backup since they can never fail. Similarly, they are ...
One of the driving forces behind the scurry to storage district networks (SANs) has been the increasing importance 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 consume of databases on storage networks, storage administrators now must deal with fresh performance, backup, restore and management issues-not to mention how to come by 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 sign that database vendors are increasingly aware of how primary the storage behind their databases is, Oracle recently announced that it is launching a storage initiative, which seeks to combine the company's various individual storage initiatives into a strategic shove to focus on how Oracle runs on storage. Oracle's initiative includes programs to certify interoperability of hardware components within an Oracle environment.
According to Allen Hoke, technical director, system platforms division of Oracle, "This program focuses on storage technology at a tall 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 docile customer experience, they are teaming with their key OS, server hardware and storage partners to provide a remote uphold strategy, aligned between us and their partners."
At this time, Oracle's partners comprise EMC, HP, Hitachi, Network Appliance, Legato, Sun, and Veritas.
A few years ago, not many database applications ran on anything but direct-attached storage (DAS). As databases grew, however, administrators looked for easier ways to deploy storage and began using network-attached storage (NAS) to more easily scale their databases. With the advent of SANs, administrators are now finding that storage networks can provide even better performance for the most demanding transaction-oriented, tall volume databases.
Today, database applications are starting to scurry from DAS to SANs. The reasons: increased ease and precipitate of backup, better scalability, as well as enhanced reliability and performance. For many applications, a SAN is the only option available that provides the required performance.
Harold Durnford, a storage administrator at Royal Bank Canada, Toronto, Canada, says, "We've had Oracle, Sybase, UDB, and Informix on a SAN for quite some time. The reason they looked at storage district networks was the challenge of sharing great storage subsystems." In addition, he says, "It wasn't just a distance limitation, but too real 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 enact with dedicated storage."
Bob Rogers, chief storage architect at BMC says, "Consistent even of performance is driving people to storage district networks, as are better property backup and recovery tools. Those are All very sturdy motivators to scurry to a SAN environment, which is why very great customers own embraced SANs and reserve databases on them quite early."
Jim Booth, director of systems engineering at CreekPath, agrees, saying, "People are lamentable to SANs primarily to come by the performance. You can certainly implement a database on either NAS or a SAN. However, if you're doing it on a SAN, you come by consistent throughput. Though it might subsist harder to manage, a SAN provides better performance and availability."
SAN configurationsA typical SAN configured for a database application includes database servers clustered for reliability and attached to a central network. At a minimum, two separate 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 own two copies of the OLTP database-one is a replicated red standby, " says Leo. The systems hasten Computer Associates' Ingres database.
"To back up the database, they are using the SAN for disk-to-disk backups. They then consume Veritas' NetBackup and a separate backup LAN to backup the SAN. To manage the disk space on the Sun, they consume Veritas in combination with EMC's SAN management tools," says Leo.
Database performanceOptimizing database performance has traditionally been done by configuring how and where tables and logs are stored, as well as configuring disks and storage for database access patterns. Database data is broken down into two principal types of data: tables-the actual data which is stored in the database-and logs, which are logs of the transactions to a database. Transaction logs are captious for recovering a database if there's a failure and are too used for replicating databases. Many databases can too consume their own endemic file systems to maximize performance, maintain control over tables and avoid potential performance penalties imposed by file system buffering. Aside from speedily storage, CPU and memory, administrators own paid a lot of attention to balancing precipitate vs. redundancy of data.
Database and storage administrators own 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 fairly 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 own seen very docile performance for databases with RAID 1+0 nature configurations. They own 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 subsist down."
To further optimize access times and data throughput, database administrators own to too accomplish sure that tables and logs never share the same spindles on a disk. John Eisenschmidt, a DBA at the American Association for the Advancement of Science, Washington, D.C., says for his last install of Oracle, "We made sure not to reserve the index tablespaces with the data tablespaces to ameliorate read performance, and reserve the archive logs and redo logs in different places to equipoise write operations." Eisenschmidt manages about 2.5TB on a SAN filesystem on Xiotech hardware, used for storing user files, though he quiet runs his databases on raw dedicated disk.
However, with the advent of SANs and virtualized storage, administrators no longer own that even of control of data placement. According to Bob Rogers, chief technology officer of BMC Software, "Most DBAs are absolutely convinced that file placement is an absolutely captious issue, however, most disks today are virtualized-and users don't own a clue where things are physically located."
Luckily, the precipitate and manageability of storage own improved the situation, despite the loss in control. Rogers says, "Today, you can come by a much more consistent even of performance by going to very great arrays such as those from EMC, IBM, and HDS than you could going to direct-attach disk."
Enter virtualizationDespite virtualization's even march into storage systems, most vendors and users mediate that some control is quiet needed to fully optimize database access. Oracle's Hoke says, "One of the immense wicked things that can betide with virtualization is that you can own two tables related in your trade application, with a tall even of traffic in sure rows of those tables."
One pass to Dramatically increase Database Performance
Question: "Have you foster across some arduous numbers and performance figures for the consume of RAID (at any level) in the database environment?"Securing PDAs with sensitive data - or access to it - should subsist taken seriously. Basically, you exigency to apply the same 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. reckon the following:Chris Poelker: Database application performance shouldn't only subsist looked at from an I/O standpoint, but first and foremost from a design perspective. For example, at one customer site, they were using SQL server in a three-tier Web application, where the Web pages were built dynamically from the database. The design used lively 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 lamentable 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 halt I/O. Never throw hardware at a needy design as the revert on investment is never as docile as taking the time to rethink the original design.Here's the some things to enact for docile I/O performance:1) consume a lot of spindles. If you scurry to and sight at the specifications on the designs to achieve maximum database performance, you'll notice they consume hundreds of drives. By a lot of spindles, I don't imply 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) consume 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 betide at a time. Using dual-pathed Fibre disks, you can own a read command on one side and a write command on the other side of the disk being queued at the same time.3) Spread the I/O load as much as possible. consume many HBAs in the server that are load balancing your I/O across All the paths. Tools fancy Veritas' Volume Manager or Solstice Disk Suite can aid enact this by creating a separate LUN from many spindles on each path. By using 2Gb paths and four HBAs, you can come by nigh to 800MB/sec to the LUN.4) consume the proper RAID even for the log and database. Best exercise here is log files should subsist on RAID 0+1 (RAID 10) and databases on RAID5 (RAID 0+1 can subsist used on the database for better performance if your budget allows for it).Performance. Today's arduous drives can achieve a sustained throughput of between 30MB/s and 50MB/s and 120 to 140 IOPS (I/Os per second) per spindle. The performance depends on the drive electronics, onboard cache size, rotation precipitate (15,000 RPM is better than 7,200 RPM of course) and maximum hunt latency. If you partition your RAID set into petite partitions, and locate your data on the outer cylinders, your performance will scurry up substantially. Doing this reduces the hunt time for a particular partition. Now just add up the number of spindles to pattern out your maximum IOPS. pattern 1680 IOPS using 14 spindles on one HBA, or 3360 IOPS using 2 HBAs to 28 disks doing 64,000 sequential I/O(random I/O will subsist less). Changing the screen size of the transfer will either increase MB per second (throughput) or IOPS. Smaller blocks accomplish IOPS scurry up, larger blocks accomplish throughput scurry up.These numbers are for direct I/O, meaning no cache in front of the drives. Adding cache can increase performance dramatically. I own seen 33,000 IOPS on a separate LUN during 100% cache hit. So, if you want the best I/O performance available, consume 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 docile 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 subsist inadvertently placed on the same disk, because virtualization masks physical locations. "Virtualization is distinguished for provisioning storage because it's effortless to scurry data and add disks. But with a database, because of performance issues, there are potential drawbacks," Hoke says.
CreekPath's Booth agrees: "File placement is quiet absolutely primary with a SAN, although disks own gotten faster. It quiet comes down to laying down data on a spinning disk, and not putting redo logs and indexes on the same physical drives. That's why it's primary for tools to view All 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 mediate administrators exigency to subsist directly concerned with where data is, "DBAs don't exigency to subsist considered about which spindle disk data lies on. They engage custody of that for them. Their rational volumes allow them to scurry data around on-the- Fly to adjust hotspots, even while running." Other vendors are too announcing tools in this area.
Durnford sees things the same way. "Using JBOD, you're much more sensitive to placements [hotspots]. However, using storage arrays, they consume their technology to scurry storage around while running to eliminate 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 worn days of NFS [network file systems], due to exigency of availability capabilities for Oracle, their customers saw storage corruption," says Oracle's Hoke. Because of those issues, Oracle's validation program for network-attached storage arose out of concern about the nature of NFS," he says.
In a SAN, storage just looks fancy a SCSI disk-reducing a number of the headaches that came with putting databases on network-attached storage, since the interface is identical to that of SCSI. Unlike NAS - with storage networks Oracle has left it to their storage partners to qualify HBAs - switches and front-end storage FC adapters. Hoke says that with a SAN, "We own not identified anything needing validation."
However, it quiet takes some travail to come by 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, fancy many I've seen, is optimized for storage capacity and file serving. While Oracle uses Xiotech's Magnitude in their test labs, I was pretty unhappy with the transaction performance they were able to come by out of it."
CreekPath's Booth says, "The biggest issue with databases on a SAN is maintaining consistent throughput and access on a database while running other application sharing the same SAN."
Caribou Lake's Leo agrees, saying, "SANs often 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 separate storage networks to solve some of these problems. He says, "For tape, we're looking at a separate tape SAN. The issue there is database traffic is very time-sensitive, where tape traffic is very backup-oriented. Though you might mediate it's time shifted, we've organize there's overlap."
The other issue most DBAs mention is the complexity of managing storage networks, which are typically managed by separate 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 liable SAN whose caching I'm not apprehensive to turn on," Eisenshmidt says.
Leo says that when you reserve a database and storage together, "You realize that your SAN management team must travail closely with the DBMS team. They own seen situations where SAN managers own 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 observant tuning of how storage is configured can eliminate sharing issues, "Both DBAs and storage administrators exigency to subsist on the same page."
Despite the issues, some users own had distinguished 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 own 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 throw it on the SAN." Brooks attributes the exigency of issues to the relationship he has with his storage vendors. He says, "We enact a lot of research, primarily in the interoperability district that might account for the exigency of issues. They travail very closely with their storage vendors to ensure certification and supportability of the environment, in case issues enact arise."
Tools and techniquesBecause SANs' fresh role as the primary storage for databases, there's now a exigency for improved tools and software to manage the combination of database applications and storage. "It would subsist nice if vendors could provide some sort of management instrument to track why a SAN partition was configured in a sure way, thus preventing the loss of historically significant details when SAN management changes hands," says DBA Leo.
"If I could own anything from a SAN to accomplish it better for a database, I'd question the vendors to write better drivers. Most of the drivers I've seen and worked with just uncover the OS the drive is gone when the SAN disconnects, instead of perhaps telling it to wait or trying to free the process," Eisenshmidt says.
Some vendors seem to subsist listening and are increasingly focusing their efforts on getting their database to hasten better on SANs, and their storage and infrastructure to better uphold databases. Take, for example, Oracle's Hardware-Assisted Resilient Data (HARD) initiative (see "Oracle's storage push"). Oracle's Hoke explains, "We're working with hardware partners to verify that when Oracle data is transferred to a disk it can subsist read. This sounds simple, but with storage management and storage virtualization in storage networks, there are lots of cooks in the broth."
Part of Oracle's arduous initiative, EMC's Oracle Double Checksum instrument offers the skill to verify Oracle data as it is written to arrays in microcode, ensuring that corrupted data is never written to disk. Competitor Hitachi Data Systems has too announced uphold 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 red 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 own 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 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 pass from a database environment in Oracle or Exchange, through files, All the pass down to disks to exhibit 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 view 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 even of performance, consistency, redundancy, and scalability that a storage network provides. Storage and database administrators alike are finding that the only pass to uphold their mission captious applications is to deploy their databases on a storage network. With so much at stake, storage and database vendors will continue to travail more in tandem to accomplish their products travail better together (see "Vendor independence: Are the trade-offs worth it?").
This article is the second in a chain that discusses a policy of security incident responses. The article describes the policy best practices and execution features — evaluation, containment, and eradication of and recovery from a security incident — for responding to a customer's incident within the policy scope.
Like this article? They recommend
There own been several large-scale worm attacks on the Internet since 1988 and highly visible and coordinated denial-of-service attacks in the last few years causing billions of dollars in damage. These attacks betoken that responding to such incidents is increasingly more intricate and requires technical knowledge, communication, and coordination among the staff responding to an incident, along with an adherence to applicable standards and policies.
A security incident response involves several aspects of preventive, detective, and recovery measures. A preventive measure primarily involves risk control that mitigates the effects or deters the episode of an undesirable event. Examples of preventive measures are passwords, keycards, badges, contingency plans, policies, firewalls, and encryption. A detective measure identifies the episode of an undesirable event. Examples of detective measures are visitor logs, audit trails, motion sensors, closed-circuit TV, and security reviews. Detective measures too provide a means for reporting the episode of events. A recovery measure is a risk control that will, in a traditional sense, comprise control policies, processes, or mechanisms that restore the integrity, availability, and confidentiality of information assets to their expected state. Examples of recovery measures are foible tolerance, backup, and catastrophe recovery plans.
Since the late eighties and early nineties, a substantial amount of information has been published on the topic of security incident response from the following organizations:
Australian Computer Emergency Response Team (AusCERT), http://www.auscert.org.au/
Brazil's Centro de Atendimento a Incidents de Segurança (CAIS), http://www.rnp.br/lang/cais_en/
Carnegie Mellon University's Software Engineering Institute's Computer Emergency Response Team/Coordination focus (CERT/CC), which was initiated by the Defense Advanced Research Projects Agency (DARPA), http://www.cert.org
European Institute for Computer Antivirus Research, http://www.eicar.org/
German Computer Emergency Response Team (DFN-CERT), http://www.cert.dfn.de/
Internet Engineering stint force (IETF) in the form of RFCs, http://www.ietf.org/rfc.html
Purdue University's Computer Incident Advisory Capability (CIAC), which is funded by the Department of Energy, http://www.ciac.org/ciac
SysAdmin, Audit, Network, and Security, http://www.sans.org
U.S.'s National Institute of Standards and Technology (NIST), http://www.nist.gov
In 1990, NIST, in conjunction with CERT/CC, CIAC, NASA, and other agency response teams, organized a cooperative activity known as the Forum of Incident Response and Security Teams (FIRST) at: http://www.first.org
This coalition brings together a variety of computer incident response teams from governments, commercial organizations, and academic organizations. FIRST fosters cooperation and coordination in incident prevention, prompts rapid reaction to incidents, and promotes information sharing and learning among the members of its community.
": Executing a Policy" is the second of a chain of articles that dispute a security incident response policy and execution. These articles are not intended to comprise All of the material from the above efforts. They are intended to capture the salient points of the security incident response process and to present them in the context of a trade entity that serves its constituents (that is, its customers).
The first article, "Responding to a Customer's Security Incidents—Part 1: Establishing Teams and a Policy," contains definitions of security incidents, security incident response, teams that typically are involved in an incident response, the pros and cons of the teams, and the scope and goals of the security incident response policy. In addition, it describes policy essentials for the notification aspect of a security incident.
This second article describes the best practices and execution of key policy features of responding to a customer's incident within the policy scope described in the first article. These features mainly comprise evaluation, containment, and eradication of and recovery from a security incident. Subsequent articles will focus on incident follow-up, with a special emphasis on forensics, risk analysis, catastrophe recovery, and government and legal recourses, as well as proactive teamwork. The primary audience consists of computer security managers, security policy developers, system administrators, and other related staff, liable for the creation or operation of a computer security incident response policy and service.
Save huge amounts of cash when you buy international edition textbooks from TEXTBOOKw.com. An international edition is a textbook that has been published outside of the US and can be drastically cheaper than the US edition.
** International edition textbooks save students an average of 50% over the prices offered at their college bookstores.
Computer Security: Principles and Practice By William Stallings, Lawrie Brown Publisher : Pearson (Aug 2017) ISBN10 : 0134794109 ISBN13 : 9780134794105 Our ISBN10 : 1292220619 Our ISBN13 : 9781292220611 Subject : Computer Science & Technology
Urban Economics By Arthur O’Sullivan Publisher : McGraw-Hill (Jan 2018) ISBN10 : 126046542X ISBN13 : 9781260465426 Our ISBN10 : 1260084493 Our ISBN13 : 9781260084498 Subject : Business & Economics
Urban Economics By Arthur O’Sullivan Publisher : McGraw-Hill (Jan 2018) ISBN10 : 0078021782 ISBN13 : 9780078021787 Our ISBN10 : 1260084493 Our ISBN13 : 9781260084498 Subject : Business & Economics
Understanding Business By William G Nickels, James McHugh, Susan McHugh Publisher : McGraw-Hill (Feb 2018) ISBN10 : 126021110X ISBN13 : 9781260211108 Our ISBN10 : 126009233X Our ISBN13 : 9781260092332 Subject : Business & Economics
Understanding Business By William Nickels, James McHugh, Susan McHugh Publisher : McGraw-Hill (May 2018) ISBN10 : 1260682137 ISBN13 : 9781260682137 Our ISBN10 : 126009233X Our ISBN13 : 9781260092332 Subject : Business & Economics
Understanding Business By William Nickels, James McHugh, Susan McHugh Publisher : McGraw-Hill (Jan 2018) ISBN10 : 1260277143 ISBN13 : 9781260277142 Our ISBN10 : 126009233X Our ISBN13 : 9781260092332 Subject : Business & Economics
Understanding Business By William Nickels, James McHugh, Susan McHugh Publisher : McGraw-Hill (Jan 2018) ISBN10 : 1259929434 ISBN13 : 9781259929434 Our ISBN10 : 126009233X Our ISBN13 : 9781260092332 Subject : Business & Economics
310-152 By Peter W. Cardon Publisher : McGraw-Hill (Jan 2017) ISBN10 : 1260128474 ISBN13 : 9781260128475 Our ISBN10 : 1259921883 Our ISBN13 : 9781259921889 Subject : Business & Economics, Communication & Media
310-152 By Peter Cardon Publisher : McGraw-Hill (Feb 2017) ISBN10 : 1260147150 ISBN13 : 9781260147155 Our ISBN10 : 1259921883 Our ISBN13 : 9781259921889 Subject : Business & Economics, Communication & Media