来自 fs 的 Node.js stats.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
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