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copy: use hardlinks to preserve space

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This commit is contained in:
Girish Ramakrishnan
2017-09-18 12:42:42 -07:00
parent f5d32a9178
commit 8ced0aa78e
1 changed files with 4 additions and 17 deletions
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21
src/storage/filesystem.js
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@@ -22,6 +22,7 @@ var assert = require('assert'),
once = require('once'),
path = require('path'),
safe = require('safetydance'),
shell = require('../shell.js'),
targz = require('./targz.js');
var FALLBACK_BACKUP_FOLDER = '/var/backups';
@@ -114,26 +115,12 @@ function copy(apiConfig, oldBackupId, newBackupId, callback) {
mkdirp(path.dirname(newFilePath), function (error) {
if (error) return callback(new BackupsError(BackupsError.EXTERNAL_ERROR, error.message));
var readStream = fs.createReadStream(oldFilePath);
var writeStream = fs.createWriteStream(newFilePath);
readStream.on('error', function (error) {
debug('copyBackup: read stream error.', error);
callback(new BackupsError(BackupsError.EXTERNAL_ERROR, error.message));
});
writeStream.on('error', function (error) {
debug('copyBackup: write stream error.', error);
callback(new BackupsError(BackupsError.EXTERNAL_ERROR, error.message));
});
writeStream.on('close', function () {
if (!safe.child_process.execSync('chown -R ' + BACKUP_USER + ':' + BACKUP_USER + ' ' + path.dirname(newFilePath))) return callback(new BackupsError(BackupsError.INTERNAL_ERROR, safe.error.message));
// this will hardlink backups saving space
shell.exec('copy', '/bin/cp', [ '-al', oldFilePath, newFilePath ], { }, function (error) {
if (error) return callback(new BackupsError(BackupsError.EXTERNAL_ERROR, error.message));
callback();
});
readStream.pipe(writeStream);
});
}