Create New File Ruby

In our daily life, we are inseparable from the application of position recognition class. Apps like Foursquare and Facebook help us share our current location (or the sights we're visiting) with our family and friends. Apps like Google Local help us find out what services or businesses we need around our current location. So, if we need to find a café that's closest to us, we can get a quick suggestion via Google Local and start right away. This not only greatly facilitates the daily life, ...

There is a concept of an abstract file system in Hadoop that has several different subclass implementations, one of which is the HDFS represented by the Distributedfilesystem class. In the 1.x version of Hadoop, HDFS has a namenode single point of failure, and it is designed for streaming data access to large files and is not suitable for random reads and writes to a large number of small files. This article explores the use of other storage systems, such as OpenStack Swift object storage, as ...

"Editor's note" Shopify is a provider of online shop solutions company, the number of shops currently serving more than 100,000 (Tesla is also its users). The main frame of the website is Ruby on rails,1700 kernel and 6TB RAM, which can respond to 8,000 user requests per second. In order to expand and manage the business more easily, Shopify began to use Docker and CoreOS technology, Shopify software engineer Graeme Johnson will write a series of articles to share their experience, this article is the department ...

According to statistics, in the United States Silicon Valley has about 150 companies involved in cloud computing. Since 2010, the world's leading IT companies have been creating and applying new business models every day to seek supremacy in the future cloud computing market. Some enterprises at home and abroad have been aware that the cloud computing revolution will lead to it restructuring, almost all heavyweight it giants have entered the field of cloud computing, the multifaceted has been determined. Microsoft, IBM, Amazon, Google and others have invested 1 billion of billions of dollars in this new form of computing, which they consider a new business model ...

In Serengeti, there are two most important and most critical functions: one is virtual machine management and the other is cluster software installation and configuration management. The virtual machine management is to create and manage the required virtual machines for a Hadoop cluster in vCenter. Cluster software installation and configuration management is to install Hadoop related components (including Zookeeper, Hadoop, Hive, Pig, etc.) on the installed virtual machine of the operating system, and update the configuration files like Namenode / Jobtracker / Zookeeper node ...

According to statistics, in the United States Silicon Valley has about 150 companies involved in cloud computing. Since 2010, the world's leading IT companies have been creating and applying new business models every day to seek supremacy in the future cloud computing market. Some enterprises at home and abroad have been aware that the cloud computing revolution will lead to it restructuring, almost all heavyweight it giants have entered the field of cloud computing, the multifaceted has been determined. Microsoft, IBM, Amazon, Google and others have invested 1 billion of billions of dollars in this new form of computing, and they think the new industry ...

Fortinet's Fortiguard threat Research and Response Lab (Fortiguard Labs) released the latest security threat reports, including a security threat trend for the first half of 2013, and recommended that a timely patch be necessary to avoid an attack. The grey software for mobile devices has been observed in the Fortiguard labs that over the past 6 months, the number of gray software for mobile phones has increased by 30%. Now see more than 1300 new samples per day and are currently tracking more than 300 Android grey soft ...

Justin.tv,youtube's threat, through 30 million independent visits per month, 30 hours a day to add video, and YouTube only 23, so in the game video upload area after losing YouTube, The following platform from the Justin.tv real-time video system, their architectural details, from what they should learn from a number of aspects for everyone to explain. First from the use of the platform began to say: twice--Agent service system, mainly in the application of buffer optimization ...

Creating a new EC2 AMI from within VMware or from VMDK files I ' ve used VMware for many Perton to allow me to test and develop server configurations and distributions. It's where I ...

"Editor's note" Vidar Hokstad is very experienced in Docker use, especially in the absence of data loss, the use of Docker to create a repeatable build on the experience, in this blog, he summed up the development of the Docker container 8 modes. Docker is now my favorite tool, and in this article I will outline some of the patterns that recur during my use of Docker. I do not expect them to bring you many surprises, but I hope that these can be useful to you, I am very willing to communicate with you in the use of ...