mongodb maintenance

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occupation. I once suggested that the author use the field name as an index, and each field name is represented in one byte, so that you don't have to worry about the length of the field name. However, the author's concerns are not unreasonable. This index method requires that the index value be replaced with the original value after each query result and then sent to the client. This replacement is quite time-consuming. The current implementation is to exchange space for time. 3. delete a reco

replication and failure recoveryUse efficient binary data storage, including large objects (such as video, etc.)Automatically process fragmentation to support scalability at the cloud levelSupports multiple languages such as ruby,python,java,c++,phpFile storage format is Bson (an extension of JSON)Accessible over the networkAdvantages and DisadvantagesThe advantages of MongoDB compared to non-relational databases are:Weak consistency (final and consi

1. Installation EnvironmentDownload the latest version of MongoDB on the official website and download the correct MongoDB version according to your own version of Windows. After downloading, double-click the 32-bit or 64-bit. msi file and follow the instructions to install it.Description The 32-bit version of MongoDB only supports databases below 2G and

Label:In a preliminary discussion, we have been able to successfully run MongoDB on our own machine. But there are some tools that we don't know about in the bin directory. Next, you'll look at the purpose of each gadget and explore the purpose of a file that MongoDB creates in the Data folder. 1, the bin directory of the following a variety of small tools and how to use Bsondump.exe Client for converting

In the previous article, we talked about MongoDB installation and management, which involves some concepts, data structures, and some API calls. It doesn't matter if you don't know it. It's actually very simple. This article will briefly introduce it. 1. Document is the core concept of MongoDB. Multiple key-value pairs are put together in an orderly manner. Document is the most basic data structure for

1), download MongoDB http://downloads.mongodb.org/win32/mongodb-win32-i386-2.4.5.zipDownload the Windows 32-bit version and unzip, the program files are in the bin directory, the other two directories are C + + calls are header files and library files. The bin directory contains the following programs: 1. Mongo.exe, command-line client tools. 2. Mongod.exe, database service program. 3. Mongodump.exe, datab

Tags: information bbb state HTTPS COMM Status OSS Tar AvoidMongoDB Shard Overview 1, what is a shard High data volume and throughput of the database application will be more pressure on the performance of the single machine, large query volume will be a single CPU exhausted, large amount of data on the single-machine storage pressure, and eventually will exhaust the system's memory and transfer the pressure to disk IO. MongoDB shards are

Tags: style god model introduces put traditional conditional value versionAbout five or six years ago, for the first time, it was a nosql that was already hot topic. But at that time the use of mysql,nosql for me is still new things, and not really use, just unknown. But the impression is such a picture (later Google to the picture from here):This picture is about the relationship between the database (including the traditional relational database and NoSQL) and the CAP theory. Because of the la

In the past, I always thought that system maintenance was a very distant and profound task, both yearning and afraid of poor performance. But now I don't want to think so much, just think about how to do it well. The "maintenance business" begins with Library maintenance. The maintenance of the library is divided into

Nowadays, buying a car is becoming more and more common. Many people need to consider the price of the car, the value of the car, and the fuel consumption of the car, however, the maintenance cost of a car is becoming an important factor for most car buyers. There is a huge gap between the maintenance costs of different vehicles. Even for vehicles of the same type, the