Mongodb Aggregation Framework

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Serendip is a social music service, used as a http://www.aliyun.com/zixun/aggregation/10585.html "> Music sharing" between friends. Based on the "people to clustering" this reason, users have a great chance to find their favorite music friends. Serendip is built on AWS, using a stack that includes Scala (and some Java), Akka (for concurrency), play framework (for Web and API front-end ...).

We can see that the widely criticized global locks have been removed in this version, replaced by db-level locks, and collection-level locks are not far off. Here is a look at the 2.2 version of several new features: 1. Concurrency performance enhancements As mentioned above, http://www.aliyun.com/zixun/aggregation/13461.html ">mongodb In version 2.2 There is no longer a global lock over the entire daemon, but a lock ...

DataNucleus Access Platform is a Java component that provides Java data persistence and management platforms, data, and service interfaces for JDO, JPA, and the web. DataNucleus Access Platform is a compatible standard Java data Persistence Framework, fully compatible with JDO1, JDO2, JDO2.1, JDO2.2, JDO2.3, and JPA1 Java standards. Provides an RES based ...

Elefant is an MVC framework system that is redefined in PHP, including a complete and simple new CMS. Elefant main Features and features:-Simple URL routing-secure database extraction and modeling system-default output filter compiled template-Integrated caching system-Flexible input validation (server-side and browser)-Simple table handling -17813.html "> Customizable user authentication-internationalization/localization-CLI support for background tasks-small SCAFFOLDING-reusable application ...

The design and development of hospital financial management and decision system based on large data four military medical University Tang This thesis mainly completes the following work: 1. Analysis of the system requirement of hospital financial management and decision making based on large data the data from the existing hospital financial management information system and related subsystems, Through the export of financial and related data acquisition and analysis, and in accordance with China's financial software data Interim standard interface for standardization, standardization and customization. Through the establishment of modern hospital financial management framework, to meet the current hospital financial management digital ...

Splunk recently announced the launch of version 6.1 Hunk:splunk Analytics for Hadoop and NoSQL data Stores for Hadoop and NoSQL data Stores. Hunk 6.1 makes it quicker and easier to convert raw unstructured data from Hadoop and NoSQL data storage into business insights. Hunk's upgrade report significantly shortens reporting time, while interactive dashboards provide rich self-help analysis without the need to ...

There are a few things to explain about prismatic first. Their entrepreneurial team is small, consisting of just 4 computer scientists, three of them young Stanford and Dr. Berkeley. They are using wisdom to solve the problem of information overload, but these PhDs also act as programmers: developing Web sites, iOS programs, large data, and background programs for machine learning needs. The bright spot of the prismatic system architecture is to solve the problem of social media streaming in real time with machine learning. Because of the trade secret reason, he did not disclose their machine ...

Recently, Clay.io's Zoli Kahan began writing "10X" series of posts. Through this series of posts, Zoli will share how to use only a small team to support Clay.io's large-scale applications. The first share is an inventory of the technology used by Clay.io. CloudFlare CloudFlare is primarily responsible for supporting DNS and as a buffer proxy for DDoS attacks while cloud ...

Replica sets+http://www.aliyun.com/zixun/aggregation/14273.html ">sharding architecture is as follows: 1,shard server: Using Replica Sets ensures that each data node has the ability to backup, automatic fault-tolerant transfer, and automatic recovery. 2, configure the server: Use 3 configuration servers to ensure metadata integrity 3, routing process: Use 3 routing processes to achieve balance, improve client access ...