Recover Database Until

The main content of this paper comes from MongoDB official blog, supplemented by Nosqlfan, this paper analyzes the traditional distributed cache system, and points out that it will bring great pressure to the database in cache reconstruction. and analyzes how MongoDB's mmap scheme avoids this problem. The following diagram of the architecture, in the database front-end with a distributed cache (such as our common memcached), so that the client to access the first lookup Cache,cache not hit the read the database and cache the structure in CAC ...

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Recently, a number of consumers to the 21st century network consumer complaints platform, their own Dangdang account has been tampered with, gift card balance all stolen brush, the amount of stolen up to 8,000 yuan. 　　The problems reflected by these victims focus on: complaints are fruitless, too slow to deal with, and stolen money cannot be recovered. 　　To this Dangdang back to 21st century network, advised users to alarm, if the reason for when the order was not intercepted in time, the money has not been recovered, or the customer has been in the Security Center when all the binding settings, its account amount is still stolen, can be the first compensation. User burst account stolen brush: Gold ring is not my ...

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As the most popular open source database, MySQL is widely used in Web applications and other small and medium-sized projects. However, in many large IT companies, MySQL has gradually deviated from the original open source version after being highly optimized and customized, more like a branch, such as the Webscalesql of Facebook, which was not long ago open source. 　　Recently, Mr. Xiong has published a blog post, from the perspective of large-scale web site architecture development of the changes in MySQL application, here for you to share. This article mainly describes the different and ...