在 MOngoDB 中, 当我们通过字段名称作为第二个查找参数时, 查找参数是 Mongodb 将整个文档装入内存还是仅包含与这些字段相关的内存?
在 MOngoDB 服务器侧, 整个文档都存储在磁盘上。 由于 MOngoDB 使用内存映射文件, 任何文档访问都要求将整个文档装入内存。 查询运行后, 只有请求的字段被传输到客户端。 这意味着在客户端/ 驱动面, 只有请求的字段被存储在内存中, 而不是整个文档。
How can I deploy a Django project that uses MongoDB to AWS? I have a project made using Django and have been using MongoDB and its Compass app and was wondering if you could deploy said project and ...
Whats the best way to access/query a DB Ref: UPDATE: users: name, groupref : {$ref:"groups",$id:"ObjectId ..." } } groups: name, topic, country,...,.. Assumption is that user belongs to only one ...
Example: > db.stuff.save({"foo":"bar"}); > db.stuff.find({"foo":"bar"}).count(); 1 > db.stuff.find({"foo":"BAR"}).count(); 0
What re the best practices to store nested sets (like trees of comments) in MongoDB? I mean, every comment can have a parent comment and children-comments (answers). Storing them like this: { ...
I ve been using the following web development stack for a few years: java/spring/hibernate/mysql/jetty/wicket/jquery For certain requirements, I m considering switching to a NoSQL datastore with an ...
I m building a Rails application using MongoDB as the back-end and MongoMapper as the ORM tool. Suppose in version 1, I define the following model: class SomeModel include MongoMapper::Document ...
I have the following setup: Mac Pro with 2 GB of RAM (yes, not that much) MongoDB 1.1.3 64-bit 8 million entries in a single collection index for one field (integer) wanted Calling .ensureIndex(...) ...
My application creates pieces of data that, in xml, would look like this: <resource url="someurl"> <term> <name>somename</name> <frequency>somenumber</...
