Documented backup expiration strategy and added test file

2018-02-23 18:16:37 +00:00
parent a77169818e
commit 7383c50134
3 changed files with 40 additions and 6 deletions
@@ -0,0 +1,30 @@
+<?php
+
+// This PHP script can be used to test the expiration strategy.
+// It is going to populate a directory with fake backup sets (directories named Y-m-d-His) over several months.
+// Then the backup script can be run on it to check what directories are going to be deleted.
+
+// rm -rf ./tests/TestDest/201* && php ./tests/populate_dest.php && ./rsync_tmbackup.sh ./tests/TestSource/ ./tests/TestDest/
+
+$baseDir = dirname(__FILE__);
+$destDir = $baseDir . '/TestDest';
+
+$backupsPerDay = 2;
+$totalDays = 500;
+
+$intervalBetweenBackups = null;
+if ($backupsPerDay === 1) {
+	$intervalBetweenBackups = 'PT1D';
+} else if ($backupsPerDay === 2) {
+	$intervalBetweenBackups = 'PT12H';
+} else {
+	throw new Exception('Not implemented');
+}
+
+$d = new DateTime();
+$d->sub(new DateInterval('P' . $totalDays . 'D'));
+
+for ($i = 0; $i < $backupsPerDay * $totalDays; $i++) {
+	$d->add(new DateInterval($intervalBetweenBackups));
+	mkdir($destDir . '/' . $d->format('Y-m-d-His'), 0777, true);
+}