来自fs的Node.jsstats.blksize属性。统计等级

原文:https://www . geesforgeks . org/node-js-stats-blk size-property-from-fs-stats-class/

stats.blksize 属性是 fs 的内置应用编程接口。Stats 类用于获取文件系统中输入/输出操作的块大小(以字节为单位)。

语法:

stats.blksize;


返回值:它返回一个数字或 BigInt 值，以字节为单位表示文件系统中输入/输出操作的块大小。

下面的例子说明了 stats.blksize 在 Node.js 中的使用:

例 1:

// Node.js program to demonstrate the   
// stats.blksize property
// Accessing fs module
const fs = require('fs');
// Calling fs.Stats stats.blksize
// using stat
fs.stat('./', (err, stats) => {
  if (err) throw err;
  console.log("using stat: the block "
    + "size for I/O operations in the"
    + " file system in bytes is "
    + stats.blksize);
});
// Using lstat
fs.lstat('./', (err, stats) => {
  if (err) throw err;
  console.log("using lstat: the block "
    + "size for I/O operations in the "
    + "file system in bytes is "
    + stats.blksize);
});


输出:

using stat: the block size for I/O operations
in the file in bytes is 4096
using lstat: the block size for I/O operations
in the file in bytes is 4096


例 2:

// Node.js program to demonstrate the   
// stats.blksize property
// Accessing fs module
const fs = require('fs').promises;
// Calling fs.Stats stats.blksize
(async () => {
    const stats = await fs.stat('./');
    console.log("using stat synchronous: "
        + "the block size for I/O operations"
        + " in the file system in bytes is " 
        + stats.blksize);
})().catch(console.error)


输出:

(node:6376) ExperimentalWarning: The fs.promises
API is experimental
using stat synchronous: the block size for I/O
operations in the file system in bytes is 4096


注意:以上程序使用node filename.js命令编译运行，正确使用 file_path。

参考资料:https://nodejs . org/API/fs . html # fs _ stats _ blksi ze