[TASK] Disabling file deduplication by default.

File hashing is a pretty intensive task both for CPU and disk.
This feature seems not to be a must have and can produce unwanted side effects.
Very large file can take a lot of time to be hashed at the end of transfert, producing protential timeouts and user frustration.

Users can still enable file deduplication feature by setting `file_hash` to `md5`.

Signed-off-by: Jerome Jutteau <jerome@jutteau.fr>

CHANGELOG.md

@@ -13,7 +13,8 @@
 # version 4.5.0
 
 - Support for dark theme
-- Fix side effects of setting too high values in php configuration.
+- Fix side effects of setting too high values in php configuration
+- Change default `file_hash` option to `random`
 
 New configuration items:
 - `max_upload_chunk_size_bytes` option

README.md

@@ -273,7 +273,7 @@ Check [issues](https://gitlab.com/mojo42/Jirafeau/issues) to check open bugs and
 
 ### What about this file deduplication thing?
 
-Jirafeau uses a very simple file level deduplication for storage optimization.
+Jirafeau can use a very simple file level deduplication for storage optimization.
 
 This mean that if some people upload several times the same file, this will only store one time the file and increment a counter.
 
@@ -283,9 +283,11 @@ When the counter falls to zero, the file is destroyed.
 
 In order to know if a newly uploaded file already exist, Jirafeau will hash the file using md5 by default but other methods are available (see `file_hash` documentation in `lib/config.original.php`).
 
+This feature is disabled by default and can be enabled through the `file_hash` option.
+
 ### What is the difference between "delete link" and "delete file and links" in admin interface?
 
-As explained in the previous question, files with the same hash are not duplicated and a reference counter stores the number of links pointing to a single file.
+When file deduplication feature is enabled, files with the same hash are not duplicated and a reference counter stores the number of links pointing to a single file.
 So:
 - The button "delete link" will delete the reference to the file but might not destroy the file.
 - The button "delete file and links" will delete all references pointing to the file and will destroy the file.

docker/README.md

@@ -36,7 +36,7 @@ Available options:
 - `ADMIN_PASSWORD`: setup a specific admin password. If not set, a random password will be generated.
 - `WEB_ROOT`: setup a specific domain to point at when generating links (e.g. 'jirafeau.mydomain.com/').
 - `VAR_ROOT`: setup a specific path where to place files. default: '/data'.
-- `FILE_HASH`: can be set to `md5` (default), `partial_md5` or `random`.
+- `FILE_HASH`: can be set to `md5`, `partial_md5` or `random` (default).
 - `PREVIEW`: set to 1 or 0 to enable or disable preview.
 - `TITLE`: set Jirafeau instance title.
 - `ORGANISATION`: set organisation (in ToS).

lib/config.original.php

@@ -158,7 +158,7 @@ $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.
+ * To enable file deduplication feature, set this option to `md5`.
  *
  * Possible values are 'md5', 'md5_outside' and 'random'.
  *
@@ -168,9 +168,9 @@ $cfg['proxy_ip'] = array();
  *  - md5 of the last part of the file and
  *  - file's size.
  * This method offer file deduplication at minimal cost but can be dangerous as files with the same partial hash can be mistaken.
- * With 'random' option, file hash is set to a random value and file deduplication cannot work anymore but it is fast and safe.
+ * With 'random' option, file hash is set to a random value and file deduplication cannot work but it is fast and safe.
  */
-$cfg['file_hash'] = 'md5';
+$cfg['file_hash'] = 'random';
 
 /* Work around that LiteSpeed truncates large files when downloading.
  * Only for use with the LiteSpeed web server!