update does for chunking

doc/chunking.mdwn

@@ -0,0 +1,22 @@
+Some [[special_remotes]] have support for breaking large files up into
+chunks that are stored on the remote.
+
+This can be useful to work around limitations on the size of files
+on the remote.
+
+Note that git-annex has to buffer chunks in memory before they are sent to
+a remote. So, using a large chunk size will make it use more memory.
+
+To enable chunking, pass a `chunk=XXmb` parameter to `git annex
+initremote`.
+
+To disable chunking of a remote that was using chunking,
+pass `chunk=0` to `git annex enableremote`. Any content already stored on
+the remote using chunks will continue to be accessed via chunks, this
+just prevents using chunks when storing new content.
+
+To change the chunk size, pass a `chunk=XXmb` parameter to
+`git annex enableremote`. This only affects the chunk sized used when
+storing new content.
+
+See also: [[design document|design/assistant/chunks]]

doc/special_remotes/directory.mdwn

@@ -25,13 +25,7 @@ remote:
 
 * `keyid` - Specifies the gpg key to use for [[encryption]].
 
-* `chunk` - Avoid storing files larger than the specified size in the
+* `chunk` - Enables [[chunking]] when storing large files.
-  directory. For use on directories on mount points that have file size
-  limitations. The default is to never chunk files.  
-  The value can use specified using any commonly used units.
-  Example: `chunk=100 megabytes`  
-  Note that chunking can be disabled later by setting chunk=0,
-  and can also safely be changed to a different size as needed.
 
 * `chunksize` - Deprecated version of chunk parameter above.  
   Do not use for new remotes. It is not safe to change the chunksize

doc/special_remotes/webdav.mdwn

@@ -29,13 +29,11 @@ the webdav remote.
   be created as needed. Use of a https URL is strongly
   encouraged, since HTTP basic authentication is used.
 
-* `chunksize` - Avoid storing files larger than the specified size in
+* `chunk` - Enables [[chunking]] when storing large files.
-  WebDAV. For use when the WebDAV server has file size
+
-  limitations. The default is to never chunk files.  
+* `chunksize` - Deprecated version of chunk parameter above.  
-  The value can use specified using any commonly used units.
+  Do not use for new remotes. It is not safe to change the chunksize
-  Example: `chunksize=75 megabytes`  
+  setting of an existing remote.
-  Note that enabling chunking on an existing remote with non-chunked
-  files is not recommended, nor is changing the chunksize.
 
 Setup example:
 

doc/tips/using_box.com_as_a_special_remote.mdwn

@@ -5,9 +5,9 @@ for providing 50 gb of free storage if you sign up with its Android client.
 git-annex can use Box as a [[special remote|special_remotes]].
 Recent versions of git-annex make this very easy to set up:
 
-	WEBDAV_USERNAME=you@example.com WEBDAV_PASSWORD=xxxxxxx git annex initremote box.com type=webdav url=https://dav.box.com/dav/git-annex chunksize=75mb encryption=shared
+	WEBDAV_USERNAME=you@example.com WEBDAV_PASSWORD=xxxxxxx git annex initremote box.com type=webdav url=https://dav.box.com/dav/git-annex chunk=50mb encryption=shared
 
-Note the use of chunksize; Box has a 100 mb maximum file size, and this
+Note the use of [[chunking]]; Box has a 100 mb maximum file size, and this
 breaks up large files into chunks before that limit is reached.
 
 # old davfs2 method
@@ -58,7 +58,7 @@ Create the special remote, in your git-annex repository.
 ** This example is non-encrypted; fill in your gpg key ID for a securely
 encrypted special remote! **
 
-	git annex initremote box.com type=directory directory=/media/box.com chunksize=2mb encryption=none
+	git annex initremote box.com type=directory directory=/media/box.com chunk=2mb encryption=none
 
 Now git-annex can copy files to box.com, get files from it, etc, just like
 with any other special remote.