使用node.js创建大文件

const fs = require('fs');
const path = require('path');

const filePath = path.join(__dirname, 'large_file.txt');
const fileSizeInBytes = 1024 * 1024 * 100; // 100MB

const writeStream = fs.createWriteStream(filePath);

// 使用循环写入数据，直到达到指定的文件大小
let bytesWritten = 0;
while (bytesWritten < fileSizeInBytes) {
  const remainingBytes = fileSizeInBytes - bytesWritten;
  const chunkSize = Math.min(remainingBytes, 1024);
  const buffer = Buffer.alloc(chunkSize, 'a'); // 使用 'a' 填充缓冲区

  writeStream.write(buffer);
  bytesWritten += chunkSize;
}

// 结束写入并关闭流
writeStream.end();

writeStream.on('finish', () => {
  console.log('大文件创建完成！');
});