利用NodeJS实现MongoDB中大数据的处理与管理

const MongoClient = require('mongodb').MongoClient;
const url = 'mongodb://localhost:27017/mydb';

MongoClient.connect(url, function(err, db) {
  if (err) throw err;
  console.log('Connected to MongoDB');

  // 在这里执行数据库操作

  db.close();
});

const data = [
  { name: 'John', age: 25 },
  { name: 'Jane', age: 30 },
  // 更多数据...
];

db.collection('users').insertMany(data, function(err, result) {
  if (err) throw err;
  console.log('Inserted', result.insertedCount, 'documents');
});

const cursor = db.collection('users').find({ age: { $gt: 25 } });

cursor.limit(10).skip(20).toArray(function(err, documents) {
  if (err) throw err;
  console.log('Found', documents.length, 'documents');
});

db.collection('users').updateMany({ age: { $gt: 25 } }, { $set: { status: 'active' } }, function(err, result) {
  if (err) throw err;
  console.log('Updated', result.modifiedCount, 'documents');
});

db.collection('users').deleteMany({ age: { $gt: 25 } }, function(err, result) {
  if (err) throw err;
  console.log('Deleted', result.deletedCount, 'documents');
});

db.collection('users').createIndex({ name: 1 }, function(err, result) {
  if (err) throw err;
  console.log('Index created');
});

mongodump --db mydb --out /path/to/backup
mongorestore --db mydb /path/to/backup/mydb