为我的 mongodb 服务器设置推荐多少 RAM 和硬盘
声明：本页面是StackOverFlow热门问题的中英对照翻译，遵循CC BY-SA 4.0协议，如果您需要使用它，必须同样遵循CC BY-SA许可，注明原文地址和作者信息，同时你必须将它归于原作者（不是我）：StackOverFlow
原文地址: http://stackoverflow.com/questions/9064167/
Warning: these are provided under cc-by-sa 4.0 license. You are free to use/share it, But you must attribute it to the original authors (not me):
StackOverFlow
How much RAM and Hard Disc is recommended for my mongodb server setup
提问by Uday
I have the below scenario for an alert notification application, for which we are going to use mongodb.
我有以下警报通知应用程序的场景，我们将使用 mongodb。
Number of writes per day 20Mill
每天写入次数 20Mill
Data size of 1month data 150 GB
1个月数据大小 150 GB
index(default primary index) size of 1 month data 15 GB
index(默认主索引) 1个月数据大小 15 GB
I want to keep the data of 12 months. How much RAM and Hard Disc is recommended for my application. I will add the additional memory that need to accomodate the working set.
我想保留12个月的数据。为我的应用程序推荐多少 RAM 和硬盘。我将添加需要容纳工作集的额外内存。
回答by Bill
The physical memory used by mongodb depends on the data being accessed. MongoDB only loads into physical memory data that is "touched"/required. Else even though the entire database is memory mapped it is not loaded into RAM (virtual memory vs resident memory). The actual RAM used is determined by the number of OS pages required for the data/index that you use based on queries/commands etc..
mongodb 使用的物理内存取决于被访问的数据。MongoDB 仅加载到“接触”/需要的物理内存数据中。否则，即使整个数据库是内存映射的，它也不会加载到 RAM 中（虚拟内存与常驻内存）。实际使用的 RAM 取决于您根据查询/命令等使用的数据/索引所需的操作系统页面数。
The following link has some information on this:
以下链接提供了一些关于此的信息：
http://www.mongodb.org/display/DOCS/Checking+Server+Memory+Usage
http://www.mongodb.org/display/DOCS/Checking+Server+Memory+Usage
If you are going to be storing approximately 165g per month and need to retain that data for a 12 month period, then you are looking at the need for at least 2tb, possibly more especially if the numbers are growing beyond what is stated above.
如果您打算每月存储大约 165 克，并且需要将这些数据保留 12 个月，那么您需要考虑至少 2 TB 的需求，尤其是在数字增长超出上述范围的情况下。
