#mongodb Indexes and #performance
▻https://hackernoon.com/mongodb-indexes-and-performance-2e8f94b23c0a?source=rss----3a8144eabfe3-
credit: ▻https://community.dedimax.com/index.php/2016/04/20/mettre-a-jour-ubuntu-14-04-lts-ou-15-10-vers-ubuntu-16-04-lts/Storage Engines: IntroductionOkey, let’s talk about sharding. Sharding is distributing #database queries across multiple servers. Before we do that, let’s get the idea of storage engines. New in MongoDB 3.0 is that they offer pluggable storage engines. A storage engine is the interface between the persistent storage, which will call the disks which might be a solid state disk, and the database itself.So, the database talks to the persistent storage through a storage engine. Now, it may be the case that the storage engine itself decides to use the memory to optimize the process. So, in other words disk is very slow. Since the idea of databases is to store stuff (...)