...Dynamic Resource Provisioning in Cloud Computing: A Randomized Auction Approach ∗ Department Linquan Zhang∗ , Zongpeng Li∗ , Chuan Wu† of Computer Science, University of Calgary, {linqzhan,zongpeng}@ucalgary.ca of Computer Science, The University of Hong Kong, cwu@cs.hku.hk † Department Abstract—This work studies resource allocation in a cloud market through the auction of Virtual Machine (VM) instances. It generalizes the existing literature by introducing combinatorial auctions of heterogeneous VMs, and models dynamic VM provisioning. Social welfare maximization under dynamic resource provisioning is proven NP-hard, and modeled with a linear integer program. An efficient α-approximation algorithm is designed, with α ∼ 2.72 in typical scenarios. We then employ this algorithm as a building block for designing a randomized combinatorial auction that is computationally efficient, truthful in expectation, and guarantees the same social welfare approximation factor α. A key technique in the design is to utilize a pair of tailored primal and dual LPs for exploiting the underlying packing structure of the social welfare maximization problem, to decompose its fractional solution into a convex combination of integral solutions. Empirical studies driven by Google Cluster traces verify the efficacy of the randomized auction. I. INTRODUCTION The cloud computing paradigm offers users rapid ondemand access to computing resources such as CPU, RAM and storage...
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...Enterprise Resource Planning Software Of The Cloud Information Technology Essay Introduction ERP on the Cloud is based on Enterprise Resource Planning software and the cloud computing platform, two technologies that have increased in popularity over the last few years. ERP refers to a business management system that comprises integrated sets of comprehensive software that can manage and integrate all the business functions within an organization (Shehab et al.). When implemented correctly, ERP is a high-cost investment but also offers high return as it enables companies to centralize their day-to-day operations in real time. Cloud computing technology enables convenient, on-demand network access to a shared pool of configurable computing resources that can be provisioned and released with minimal management effort or service provider interaction (Mell et al.). There are three service models in cloud computing: Software as a Service (SaaS), Platform as a Service (PaaS), and Infrastructure as a Service (IaaS). SaaS is capability provided to the consumer to use the software provider's applications running on a cloud infrastructure, with applications accessible from various client devices (Mell et al.). PaaS is capability provided to the consumer to deploy onto the cloud infrastructure consumer-created or acquired applications created using programming languages and tools supported by the provider (Mell et al.). IaaS is capability provided to the consumer to provision processing...
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... | |Content Standards: (Stated in Student Friendly Language): |Language Objectives: (Stated in Student Friendly Language): | |Students will differentiate between different weather types. |Students will verbally justify weather terms within their table group. | | |Students will role play various weather types. Students will create a weather | | |dictionary using sentences and illustrations. | |Key Vocabulary: |Visual Resources (including Supplementary and Adapted): | |drought, hurricane, blizzard, lightning, hail, foggy, windy, cloudy, |*science big book text | |stormy, snowy, cold, cool, warm, hot, sunny, tornado |*pictures of weather types | | |*CD’s with weather sounds | | |*container containing weather vocabulary on strips for choosing | |Hots Question: ...
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...1.With Google Glasses, the technology disappears from in front of you and you get data and applications in the context of what you’re doing or what you’re looking at. Want to know the weather right now? You won’t have to find the weather app and click on it to get a report. Weather apps for Google Glass will know when you’re looking up at the clouds and provide you with an instant weather report. If you’re unsure of what’s at a particular street address, look at the premises and Google Glass will tell you who’s inside, and possibly even show you the indoor plans along with a 360° panorama view if it’s a business. 2. Google Glass introduces absolutely new way of computing, with a simple, voice-driven user interface that makes a number of tasks much more intuitive. There are some examples of these: 3. To start using Google Glass, you tap the frame of the glasses and you’re taken to the home screen. You don’t see a bunch of icons like on smartphone home screen, just a simple real-life scene you’re looking at. To issue a command, you tap the frame and say “OK Glass”. 4. After you issue the order “OK Glass”, you can instruct the glasses to do something specific by saying something like “take a picture”. That’s it. There’s no fumbling around looking for the camera icon. 5. Same goes with video. With Google Glass, you can record what you see without moving a finger. 6. Now this is what calls serious sharing — actually sharing what you see with your friends . 7. Lost...
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...More than 80 people and their pets had to be rescued by boat from their flooded homes after more than seven inches of rain fell Saturday and Sunday in Louisville, Kentucky. The National Weather Service declared a flash flood emergency for Louisville early Sunday due to back-to-back thunderstorms that began Saturday.. First floor apartments were flooded and vehicles were swallowed by high waters after 5.91 inches fell in Louisville on Saturday alone, according to the Weather Channel. Flooding closed at least 45 roads. Authorities say more than 80 people were rescued or evacuated thanks to seven-inches of rainfall that fell in 36 hours. NBC's Kerry Sanders reports. "I was lying there sleeping, kids woke me up, looked out, I couldn't believe it," evacuee Vickie Dedrick told NBC affiliate WAVE in Louisville. "Just a little bit of water on the road, next thing you know it looks like a tidal wave come through; looks like all cars washed off," added evacuee Mark Elliott. No injuries were reported, but at least 45 roads were closed and many homes and cars were damaged, according to the Courier-Journal. According to the National Weather Service, a record 5.91 inches of rain fell on Saturday, breaking the day's old record of 3.07 inches of rain set on October 5, 1910, WAVE reported. The deluge also already breaks the local all-time record for rainfall the month of October: The previous record was 5.07 inches set in 2004. The National Weather Service reports...
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...would go away. As I am in my window I start to feel my house lift from the ground swirling round and round. I ran to my parent’s bedroom to make sure they were alright; attempting to open up the door they seemed to be a strong force preventing me from getting in so I yelled mom/dad as loud as I could but there was no response. Next I sprinted down the stairs to my brother’s room and tried to open the door but his was locked. Feeling hopeless and afraid I ran back to my bedroom and got underneath my covers. I started to pray that this was all a bad dream that I would soon wake up from, the rain came to a halt and the winds began to settle. As I pulled the covers from off of my head, then got out of the bed to go the window I notice clouds of fog surrounding the house. What I thought was a bad dream was not so bad after all; there were stuffed animals and candy everywhere. I notice that when I walked it was as if I was floating on thin air like there was nothing beneath me. Everything was in slow motion, I thought to myself wow is this what every kid experiences the night before they turn 6 years old. As I am starting to feel a sigh of relief I was awaken by my entire family and friends singing happy birthday. They were carrying my birthday cake into my bedroom with big stuffed animals, toys and candy. I must say I’ve had a lot of crazy dreams, but this is one I will never...
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...condenses it releases heat * Warm air is less dens than cold air, the added heat will make the rising air continue in an updraft * If updrafts push air high enough into the atmosphere, the water droplets freeze in the tops of cumulonimbus clouds( tall clouds that rise to high altitudes and spread to form wide, flat, anvil-shaped tops. * Cold air pushing under warm air is a common mechanism triggering system for these storms * Thunderstorms average 24 kil across but can travel as much as 1000 killometers * Lightning is a result of a charge separation from the top and bottom of the cumulonimbus clouds * Charge separation increases as particles are carried in updrafts toward the top of the clouds and collide with the downwards moving ice particles or hail * Enormous electrical separation or potential between different parts of the cloud and between the clouds and the ground. * Electrical resistance cannot keep the opposite charges apart and the positive and negative charges rejoin and with an electrical lightning stroke * Cloud to ground lightning is generated when charged ions in a thundercloud discharge to the best conducting location on the ground * Lightning strikes from cloud to cloud to equalize its charges * Lightning is visible because of the difference between the speed of light and the...
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...“Rain, rain go away, come again some other day.” On September 9, 2012 as I sat on the beach with my family for their annual so long to summer picnic, dark clouds rolled in and it started to rain lightly. We were at first amused at the situation, but then had to decide whether to pack up and leave or stay and make the most of the day. Some sheltered under the beach umbrellas, while others shredded their clothes and went out into the rain in their bathing suits. The situation was amusing but frustrating. We laughed and wondered how it was that they could be so wrong sometimes and then hit it on the head at other times. In a matter of one hour the dark clouds and rain moved northward and the sun was shining brilliantly. . While I watched the skies and ocean, and felt the windswept sand hit my body, it came to mind that the weather and how it affects us would be a great career choice. Since I was young, I had an interest in the weather. Every morning I would look at the weather predictions to determine how to dress, and what outdoor activities I would be able to do. I am a skateboarder, and in the summer I go to the beach frequently, so the weather does affect the planning of my day. The weather is interesting, dangerous, and can be life altering for some people. Used as an event planner for many day to day activities, for agriculture, flight planning, fishing excursions and even planning military maneuvers, the weather is an important factor in our lives. In addition...
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...Sleet forms when there is a layer of above freezing temperatures below cloud base but the temperatures at the surface are below freezing. A snowflake falling out of the cloud will melt in the above freezing layer producing a rain drop. The below freezing surface layer must be thick and cold enough to refreeze the raindrop before reaching the ground. Hail is produced inside a cumulonimbus cloud by accretion of super-cooled liquid water onto a large frozen embryo caught in a strong updraft. Continuous cycles through areas of super-cooled liquid water will cause the hailstone to increase in size until it can overcome the upward vertical velocity and eventually fall to the earth’s surface. What is the difference between freezing rain and sleet? Freezing rain is liquid (super-cooled) that will freeze on contact with objects that are below freezing on the surface. The determining factor between sleet and freezing rain as a precipitation type, is the depth and coldness of the subfreezing layer near the surface. Sleet is usually a transparent or translucent ice ball around .2 inches or less in diameter. When it hits the ground it can bounce. The formation of sleet was discussed in the previous question. Describe how hail might form in a cumulonimbus cloud? Hail is formed when clouds, specifically cumulonimbus clouds, have both high altitudes and powerful updrafts within the condensation layer of the cloud. As rain droplets form, they are frozen and then carried aloft again...
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...can alter your results. For my weather diary I made sure I took the temperature at the same time every day as to get true, comparable results. To keep consistency in my results I also took the temperature using the same thermometer each time, and took the readings from the shade, rather than somewhere in direct sunlight, which could have given a fake result, as the temperature readings could have been higher as they were I the sun. this helped me complete my weather diary, as it allowed me to see the temperature of a number of weeks and use it as comparable data, in other areas of the weather diary, such as pressure and cloud cover. Cloud cover and cloud types were another fieldwork technique used to complete my weather diary. By looking up into the sky, in the same place and the same time every day I was able to roughly give a result in oktars of how much cloud cover there was on a particular day. As...
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...traditions, although in a way that argues against it which is irritating to some. He claims that without him the state is likely to enter into a “deep sleep” meaning that it would be forgotten. In Aristophanes’ Clouds, he treats Socrates crudely because its purpose is for Just Arguments whereas Socrates used Unjust Arguments. In The Apology, Socrates gives a speech defend himself and his conduct. He says that since he has no experience with the law courts he is going to talk in the manner he is most used to: honestly and directness. He explains that his conduct was because of the Delphic oracle who said that he was the wisest of all men. Knowing that he doesn’t know much of world affairs, he concluded that he is only wiser than other people only in that he knows nothing. To spread his wisdom he goes around to question “wise” men to expose their ignorance. Although he earned the admiration of young Athenians, hatred ensued from the people he embarrassed which would be the reason he was on trial. He says that he is merely a gadfly stinging a lazy horse which is the Athenian state. Claiming that without him Greek traditions would be forgotten and that through his interactions, even if it is irritating to some, it can be used to become a productive and virtuous action. In The Clouds, Aristophanes writes about a how a father, Strepsiades, worries over the financial issues due to his son’s, Pheidippides, financial spending. In order to outdo the creditors through an “Unjust” argument he...
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...Cheat Codes Result | Cheat Code | Adrenaline effects | munasef | Aggressive traffic | ylteicz | All cars have nitrous | speedfreak | Always 00:00 or 12:00 | xjvsnaj | Always 21:00 | ofviac | Armor, health, and money | hesoyam | Beach party theme | cikgcgx | Beater traffic | bgkgtjh | Black traffic | iowdlac | Bounty on your head | bagowpg | Carnival theme | crazytown | Cars fly away | bsxsggc | City in chaos | iojufzn | CJ jumps higher | kangaroo | Cloudy weather | alnsfmzo | Commit suicide | szcmawo | Deadly vehicle | jcnruad | Destroy all cars | cpktnwt | Fast motion | speeditup | Flying boats | flyingfish | Flying cars | ripazha | Foggy weather | cfvfgmj | Gangs and workers | mroemzh | Gangs only | bifbuzz | Hitman level in all weapons | professionalkiller | Infinite ammunition | fullclip | Infinite health | baguvix | Invisible cars | xicwmd | Kinky theme | bekknqv | Lower wanted levell | asnaeb | Manual weapon control in cars | ouiqdmw | Massive BMX bunny hops | cjphonehome | Maximum fat | btcdbcb | Maximum lung capacity | cvwkxam | Maximum muscle | buffmeup | Maximum respect | worshipme | Maximum sex appeal | helloladies | Maximum vehicle skills | naturaltalent | No fat or muscle | kvgyzqk | No hunger | aeduwnv | Pedestrians are Elvis | bluesuedeshoes | Pedestrians attack with guns | bgluawml | Pedestrians have weapons | foooxft | Pedestrians riot | ajlojyqy | Perfect handling | pggomoy...
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...The long summer day had been filled with dark and gloomy clouds. The air was so thick I could hardly breathe. My pajama's clung to my body as if I had just been sprayed with the garden hose. I remember thinking that I wished that it would just hurry up and rain already. The next thing that I remember is running to my parent's car in the middle of the night. With the distinctive loud wail of a tornado siren, the wind howling, and lightening filling the dark sky, I have never been so afraid in my life. The loud tornado siren was not something new to me, even though it frightened me every time that it went off. Most times, though, it was just going off for a weekly test and was not in the middle of the night. That night it was no test. It was the real thing. We had to jump into the car for the short drive to my memaw's house, running over my dog Joe in the process. Even though my memaw only lived a mile away, the drive seemed to take forever. Would we ever reach her house and the safety of her cellar? I have never run so fast in my life as I ran that night, from the car to the ground cellar in the back yard. The wind was blowing so strongly that I felt as if I wasn't moving at all. The lightening filled the dark cloudy sky and, all I could see was the shadow of my silhouette on the ground in front of me. Loud thunder clapped in my ears and made me shudder, the ground shaking under my feet. Finally, I felt relief and fear at the same time as I reached the cellar door. I climbed...
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...hideous task, hence u need to have more stockings than any others 5) No matter what u wear, u always arrive at a place either partially wet or fully 6) U can always go late to places and give rain as a reason 7) When ppl in other part of cities make a fuss about rain, u are actually like what? 8) Walking/ jogging can never be executed or even if u do, it’ll be always with ur umbrella 9) If u ride bicycle u can always play water games 10) U can always see waterfalls every here and there 11) Frequent power cuts are a part of ur life, and u actually get a lot of time to think about urself, and power cuts during school days would always let u sleep early 12) Lightning, thunder, heavy rains are a part of ur life, ufed ur imagination with cloud fights and other stories Playing lightning game, guessing which moment lightning comes, how strong will it be is a part of ur life 13) U have become a pro in guessing rains 14) Rainbows are a common sight, and u actually do not care about them 15) When people say that they should reach before it rains, u are like what? 16)Finally when u have moved out of ur hometown, u actually miss those heavy...
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...Cirrus clouds are the most common of the high clouds. They are composed of ice and are thin, wispy clouds blown in high winds into long streamers. Cirrus clouds are usually white and predict fair to pleasant weather. By watching the movement of Cirrus clouds you can tell from which direction weather is approaching. When you see Cirrus clouds, it usually indicates that a change in the weather will occur within 24 hours. Cirrostratus clouds are thin high clouds that often cover the entire sky. They are so thin that the sun and moon can be seen through them. Cirrostratus clouds usually come 12-24 hours before a rain or snowstorm. Cirrocumulus clouds appear as small, rounded, white puffs that appear in long rows. The small ripples in the Cirrocumulus clouds sometime resemble the scales of a fish. Cirrocumulus clouds are usually seen in the winter and indicate fair, but cold weather. In tropical regions, they may indicate an approaching hurricane. Altostratus clouds are gray or blue-gray middle level clouds composed of ice crystals and water droplets. These clouds usually cover the entire sky. In the thinner areas of the cloud, the sun may be dimly visible as a round disk. Altostratus clouds often form ahead of storms that will produce continuous precipitation. Altocumulus clouds are mid level clouds that are made of water droplets and appear as gray puffy masses. They usually form in groups. If you see Altocumulus clouds on a warm, sticky morning, be prepared to see...
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