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MongoDB Data Link Modeling The data in MongoDB is very flexible, and the collection does not require a uniform structure for documents. However, seriously considering the data model is still very important, because it will affect application performance and database capabili
": +, "Videocdnstatus": Ten, "Checksumstatus": 10, " Mmsstatus ": 1}Encodecursor=db.video_encode.find (query)Historycursor=db.video_encode_history.find (query)Taskiterator (Encodecursor)Taskiterator (Historycursor) def taskiterator (cusor):For encode in Cusor:Mid=encode["Mid"]encodeid=encode["Encodeid"]vtype=encode["VType"]dsturl=encode["Dsturl"]checksumpath=encode["Checksumptah"]F.write (Str (mid) + "," +str (Encodeid) + "," +vtype+ "," +dsturl+ "," +checksumpath+ "\ n")Print "Start run to expo
1. Course OutlineThis course introduces the knowledge of MONGODB data model, including the basic concepts of documents, collections and databases, usage methods and naming rules, the introduction of MONGODB basic data types and the introduction and use of MongoDB shell.
1. Course OutlineThis course focuses on MONGODB data model-related knowledge. Contains basic concepts, usage, and naming conventions for documents, collections, and databases, the main data types of MongoDB, and the introduction and use of MongoDB shell. Document and C
it by the date field of another index (the index is created in reverse order, and the sorting is also in reverse order ), and the performance of 10 records is returned after the skip100 records. The impact of skip and order on the performance is measured. 7) query the performance of 100 records (that is, KB) (no sorting and no conditions). This test is to test the performance impact of query results of large data volumes. 8) count the total disk
, and the sorting is also in reverse order ), and the performance of 10 records is returned after the skip100 records. The impact of skip and order on the performance is measured. 7) query the performance of 100 records (that is, KB) (no sorting and no conditions). This test is to test the performance impact of query results of large data volumes. 8) count the total disk usage, index disk usage, and data
Our products require full-text search functionality, and back-end data storage primarily uses MySQL + MongoDB, where the content that needs to be retrieved is in MongoDB.MongoDB itself is self-featured with text indexing, but it does not support Chinese. The technology industry has specialized, MongoDB is the data stor
Backup and recovery are required for any database, which is of much importance and everyone understands. MongoDB also provides backup and recovery functions, which are under the MongoDB download directory. Backup and recovery are required for any database, which is of much importance and everyone understands. MongoDB also provides backup and recovery functions, w
Previously introduced applicationsProgramAll logs, exceptions, performance, and status data in the information center module depend on the MongoDB data service. The interfaces of the MongoDB data service are also simple: Public InterfaceImongodbinsertservice: idisposable {
this scenario, users can comment on images, articles, and other resources. All comments are included in the comment set. If you only use Manual References, I cannot tell which type of resources the comment belongs to, pictures? Article ?. So we have DBRef. DBRefFormat: {$ ref: , $ Id: , $ Db: } $ Ref: Set Name; $ id: referenced id; $ db: Database Name; optional parameter. It can be seen that the structure of DBRef is more complex than that of Manual References, which occupies a l
MongoDB-level data Insert, Query, and Delete performance tests (without or without indexing) Let's take a look at the testing machine performance (64bit ): Performance_^ [root @: ~] # Grep"Model name"/Proc/cpuinfo | cut-f2-d: Intel (R) Xeon (R) CPU E5606 @ 2.13 GHz Intel (R) Xeon (R) CPU E5606 @ 2.13 GHz Intel (R) Xeon (R) CPU E5606 @ 2.13 GHz Intel (R) Xeon (R) CPU E5606 @ 2.13 GHz Intel (R) Xe
A tool for real-time data synchronization between mongodb and ElasticSearch Based on netcore (ipv2es ), Tools for real-time data synchronization between mongodb and ElasticSearch Based on netcore One-to-one, one-to-many, multiple-to-one, and many-to-many data transmission mo
Background introduction With the development of business and the change of demand, we pursue the use of different types of databases and give full play to their respective characteristics. If you decide to adopt a new type of database, you need to migrate the existing data to the new database. In this type of requirement, it is particularly important to import data
Recently I have been studying MongoDB. I have learned a lot about data modification and complicated commands. So I will summarize some frequently used modification commands in this blog to facilitate future study. Recently I have been studying MongoDB. I have learned a lot about data modification and complicated comman
machineString connectionString = "Mongodb://localhost";Connected to a mongoserver.Mongoserver Server = Mongoserver.create (connectionString);//-------------------------------------------------------------------------Open Database TestDBMongodatabase db = server. Getdatabase ("TestDB");Get Collection EmployeesMongocollection collection = db. GetCollection ("Employees");//-------------------------------------------------------------------------Create a
Input { file { Path = = ['/gwlog/data/**/*.json '] discover_interval = 1ignore_older = 5 Start_position = "Beginning" Close_older = 6 max_open_files = 200000 codec = JSON }} Filter { Mutate { Remove_field = ["@version", "host", "path"] }}output { MongoDB { codec => JSON collection = "Tst_log" database "Runlog" uri "
The data of the MongoDB modeling application depends on the data itself, which is also related to the characteristics of MongoDB. For example, different data models may improve application query efficiency and insert The data of t
This is my first blog, many have insufficient please advise, talk not much, straight into the topicReason: Because of the large amount of MONGODB data, occupy a large space, so decided to transfer the data directory to another diskOne, check disk usage[Email protected] ~]# df-hFilesystem Size used Avail use% mounted on/DEV/SDA1 40G 35G 5G 88%//DEV/SDB1 100G 2G 98
MongoDB data file backup and recovery backup and recovery data are important for managing any data storage system. 1, cold backup and recovery-Create a copy of the data file (if you want to stop the MongoDB server), that is, direc
Effective data models serve applications. The key issue in the design architecture is whether the document model is applicable to embedded models or references ). Effective data models serve applications. The key issue in the design architecture is whether the document model is applicable to embedded models or references ). Effective data models serve applic
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