How To Slave

Absrtact: With the rapid take-off of China's economy, the development of environmental pollution problems intensified, haze in all regions raging, PM2.5 index frequent "explosion", the daily life of the people caused great trouble, aroused public opinion's strong concern. The Government attaches great importance to and put PM2.5 monitoring work in the focus of environmental protection work. Cloud creates storage independent innovation PM2.5 cloud monitoring platform breaks the traditional research and development way, utilizes the innovative design idea, causes the environmental protection and the cloud computing high-end technology organic combination, the structure massive monitoring data storage, the processing platform, may reflect each region's air quality microcosmic, for the public ...

The task allocation process of Apache Mesos is analyzed in the following figure: Step 1 when one of the following events occurs, the resource allocation behavior is triggered: New framework registration, frame logoff, additional nodes, idle resources, etc. step 2 Mesos The allocator module in master allocates resources to a framework and encapsulates the resources into Resourceoffersmessage (protocal Buffer message), which is transmitted over the network to Schedulerproce ...

The scalability of the system is the main reason for promoting the development of NoSQL movement, including distributed system coordination, failover, resource management and many other features. That makes NoSQL sound like a big basket that can be stuffed with anything. Although the NoSQL movement does not bring fundamental technological changes to distributed data processing, it still leads to extensive research and practice on protocols and algorithms. It is through these attempts to gradually summarize some effective database construction methods. In this article, I will focus on the distributed features of the NoSQL database ...

Apache Cassandra is a highly performance, scalable, distributed NoSQL database with a flexible, simple partitioned row storage data model that can be used to deal with commercial servers and massive data storage across data centers without a single point of failure. It was originally developed by Avinash Lakshman (Amazon Dynamo developer) and Prashant Malik on Facebook to address their inbox-search problems, then officially open source in July 2008, and since then ...

As a software developer or DBA, one of the essential tasks is to deal with databases, such as MS SQL Server, MySQL, Oracle, PostgreSQL, MongoDB, and so on. As we all know, MySQL is currently the most widely used and the best free open source database, in addition, there are some you do not know or useless but excellent open source database, such as PostgreSQL, MongoDB, HBase, Cassandra, Couchba ...

In the SIP project design process, for its huge log at the beginning to consider using the task decomposition of multithreading mode to analyze statistics, in my previous article "Tiger Concurrent Practice-Log analysis of parallel decomposition design and implementation" mentioned. But because the content of statistics is still very simple, so the use of memcache as a counter, combined with MySQL to complete the access control and statistics work. However, in the future, the work of massive log analysis needs to be prepared. Now the most fire ...

Hadoop Learning Notes - Production Environment Hadoop Large Cluster Configuration Installation Installation Environment Operating Platform: vmware2 Operating System: Oracle Enterprise Linux 5.6 Software Version: hadoop-0.22.0, jdk-6u18 Cluster Architecture: 3+ node, master node (hotel01) slave node (hotel02, hotel03 ...) host name ip ...

1. List the machines used in general PC, requirements: Cpu:750m-1gmem: >128mdisk: >10g does not need too expensive machines. Machine Name: FINEWINE01FINEWINE02FINEWINE03 will finewine01 as the main node, and the other machine is from node. 2. Download and build from here Checkout, I choose Trunkhttp://svn.apache.org/repos/asf/lucen ...

As we all know, it is not easy to fight in Beijing, the house price is their heart pain. After 12th years in Beijing, Xu Bo (a pseudonym) finally became a house slave. Let the original monthly income has 14000 can live a very good life, living to still 13000 yuan of the mortgage, he some self-deprecating said he was happy: "From then on, do not tangle to be a house slave, the heart of the big Stone finally fell to the ground, smashed on the foot." "Their new house in a district of the North Ring, 23000 yuan per square metre price, for them really is the day ...

Intermediary transaction http://www.aliyun.com/zixun/aggregation/6858.html ">seo diagnose Taobao guest cloud host technology Hall often see a lot of webmaster friends in A5 and webmaster home to publish some Web site optimization and promotion methods, Said a lot of promotional methods, in fact, do not need to do a network to all the methods are used, the so-called one way to use the ultimate is success, even if this method is simple. Today in the reference to the predecessors of the promotion of experience and the combination of my ...

10 years ago, banks were instilling in them the idea of debt consumption with tomorrow's Chankon today's dream. Now, many people have been tired. Under the impact of bank credit products, such as mortgage, car loan, decoration loan, credit card and so on, many people have become house slaves, car slaves and slave slaves. According to the Wuhan branch of the Department of Management data show: To this February, Wuhan City personal consumption loan balance of 69.2 billion yuan. If the city's 8 million resident population calculation, Wuhan per capita loans of 8650 yuan.　　2008 Wuhan City per capita disposable income of 17000 yuan. According to this calculation, Wuhan per capita debt rate ...

Overall overview The following is a general overview of my initial reading of documents and source code, which can basically be kubernetes from the following three dimensions. The Operation object kubernetes the interface in restful form, and the user can manipulate three rest objects: Pod: Is the kubernetes most basic deployment dispatch unit, can contain the container, logically represents one kind of application the instance. For example, a Web site application by the front-end, after ...

The two greatest treasures of a person's life are: your talent and your time. More and more talent, but less time, our life can be said to exchange time for talent. If the day passes, we have less time, and talent does not increase, it is wasted time.   　　So we have to save time and use time efficiently. 　　How to make efficient use of time? I have the following suggestions: 1. Do what you really are interested in and consistent with your life goals. I found my "productivity" and my "interest" ...

Income of course is getting better, but the Alexa data show is not so optimistic. 　　Opening up the application of third parties in advance, enhancing stickiness and innovation is a new approach, but the problem it faces is that it is no longer a dark horse. 　　Happy NET has some new action in the middle of May, they first introduced a third-party development of components, in addition to the X World, Texas Poker and other games, but also include air tickets, driving test theory, group purchase and other life-class applications. Surprisingly, just last November, happy Net founder Cheng also made clear that within one year ...

Nowadays, many people are concerned about the development of the mobile Internet. They are asking what the future is going to be: whether it is a general trend or not? And I think about it. Of course, I'm talking about some very subdivided areas, not big trends. 1, the information flow community I have mentioned in Weibo, I always have all the community is divided into two categories: relational community and information flow community. One of the representatives of the relationship-based community is Renren, your relationship chain is more than the actual relocation of friends; watercress is the representative of the information flow community, users in this community have a relationship because of a specific letter ...

Data tampering is to modify, add or delete computer network data, resulting in data destruction. The database data was attacked first to see if it was deleted or tampered with? Is there any backup data that can be restored and reinforced? This article comes from the database technical expert Zhang, mainly describes the MySQL attack tampering data, utilizes the Binlog from the library backup and the main library to carry on the incomplete recovery. The following is the author's original: First, the discovery of the problem today is 2014-09-26, development early in the morning that the database was attacked. The article in the database of an article table ...

Pan pan masterpiece "Cold Night" Pan became the first female president of Sichuan Film Association, yesterday, the Sixth Congress of Sichuan Provincial Film Association held in Chengdu, the meeting announced that Pan elected the new film Association chairman. When the chairman of the pan, frankly not ready. And as the chairman of her natural will also be responsible for doing practical work for Sichuan, the first task is to win the Golden Rooster in 5 years of the right to hold the flowers.　　If feasible, Chengdu will usher in a new movie flourishing. When the chairman admitted that he was not ready to vote, Pan as the Sixth film Association of Sichuan. As the Shadow Association Lord ...

Sunshine Community reporter Wu Xuan firm intern Pan Muying Property Price High, the reality of most workers even overtime every day, 10 years to win a set of suburban house is also very laborious.　　Recently, unbearable brutal reality of dwelling a group of people hooked on a SNS online game, in this game can easily become a "store House" millionaire, past the "rent addiction." Login four times to change "rent" reporter recently entered the "Room small white" game found that the original game is about building houses, rent collection, the house from the country cottage, green tile, star-FAI Hut has been upgraded to the manor ...

Summary: What is weakness marketing? The Elves of the universe, the spirit of all things, speak of mankind. 　　But in reality, there are many weaknesses in human nature: greed, fear, jealousy, laziness, lust, greed, vanity, hard to resist temptation, fear of loneliness, love of free, attention to rank, what is the weakness of marketing? 　　"The Spirit of the universe, the spirit of all things," said human beings. But in reality, there are many weaknesses in human nature: greed, fear, jealousy, laziness, lust, greed, vanity, difficult to resist temptation, fear of loneliness, love free, pay attention to the ranks, superstitious experts, worship celebrities, like the drift ... About ...

With the advent of cloud computing, there are many new nouns, such as cloud database, cloud storage, elastic expansion, resource isolation and so on. 　　The following is the hot "shared database" for everyone to explain what is called "shared database". I introduce myself first, I am engaged in IT industry 10, was an architect many years ago. 　　Below is a personal experience, as well as with some Google, BAT, Jingdong and other companies cloud computing architects to get the summary of the experience, for you to analyze what is a "shared database." What is shared data ...