Write a file atomically and use fsync to flush contents
npm install crash-safe-write-fileNode.js file operations, even writeFileSync, cannot guarantee that the contents of the file were written.
From http://www.daveeddy.com/2013/03/26/synchronous-file-io-in-nodejs/:
>fs.writeFileSync is synchronous in the sense that it blocks the event loop while it executes. It does NOT ask the Kernel to do a synchronous write to the underlying file system.
This is fine for most cases, but if you're trying to write a file that's immune to crashes, you need to get into the fsync game. This library borrows graciously from the storage methods in nedb.
npm install crash-safe-write-file --save
Usage
js
const writeFile = require('crash-safe-write-file').writeFile;
writeFile(filename, data, callback);
`
js
import {writeFile} from 'crash-safe-write-file';
writeFile(filename, data, callback);
`Signature
js
/**
* Fully write or rewrite the datafile, immune to crashes during the write
* operation. Writes to a temporary file like write-file-atomic, but flushes
* all buffers using fsync.
*
* Adapted from https://github.com/louischatriot/nedb/blob/master/lib/storage.js.
*
* @param {String} filename The destination file
* @param {String} data The data to write
* @param {Function} callback Optional callback on completion or error
*/
function writeFile(filename, data, callback);
``