[TASK] more details about md5_outside option

[jirafeau_mojo42.git] / lib / config.original.php

diff --git a/lib/config.original.php b/lib/config.original.php
index 7b1d4ec8e4135003ec149bff8884cb17a4aaad77..7f8e6ceeab99f518ff3b1279c03833b19ed1991e 100644 (file)
--- a/lib/config.original.php
+++ b/lib/config.original.php
@@ -147,6 +147,17 @@ $cfg['maximal_upload_size'] = 0;
  */
 $cfg['proxy_ip'] = array();
 
+/* File hash
+ * In order to make file deduplication work, files can be hashed through different methods.
+ * By default, files are hashed through md5 but other methods are available.
+ * Possible values are 'md5' and 'md5_outside'.
+ * With 'md5' option, the whole file is hashed through md5. This is the default.
+ * With 'md5_outside', md5 is used to hash the first part of the file, the last part of the file. This method offer file deduplication at minimal cost but can be dangerous as files with the same partial hash can be mistaken.
+ * With 'random', file hash not set to a random value and file deduplication cannot work anymore but it is fast and safe.
+ * and the file's size. This method is fast for large files but cannot be perfect.
+ */
+$cfg['file_hash'] = 'md5';
+
 /* Required flag to test if the installation is already installed
  * or needs to start the installation script
  */