MongoDB Solid-State list

The list specified by the current database in MongoDB can be a solid-state list, so-called solid state is the size determination, such as creating a solid-state collection: Db.createcollection ("The name of the solid state Collection", {capped:true,size:1000, Max:10,autoindex:false});

1.autoindex:false refers to whether to generate "_id";

2.size:1000 refers to whether to generate a list of 1000 bytes;

3.max:10 can have 10 records;

Converting a normal collection into a fixed set requires the use of the converttocapped command

4.db.runcommand ({converttocapped: "collection name required for conversion", size:2000});

MongoDB Solid-State list