diff --git a/MIGRATING.md b/MIGRATING.md
index c2ecc93..1092661 100644
--- a/MIGRATING.md
+++ b/MIGRATING.md
@@ -4,6 +4,9 @@ The storage format of the filetracker server is very different in the new server
 so non-trivial migration is required if you want to preserve your users' files
 (submitted sources, problem packages, etc.).
 
+After migration is complete, you may expect total filetracker storage size to decrease
+by ~70% for a typical OIOIOI instance.
+
 There are two migration options, but for both of them, you first need to make sure OIOIOI
 uses `remote_storage_factory` as `FILETRACKER_CLIENT_FACTORY` and `FILETRACKER_CACHE_ROOT` is configured in your `settings.py`. If you have a recent
 config version (23+), this is the default behaviour.
@@ -33,6 +36,8 @@ Navigate to `ft_root` and execute the following command:
 
 CAUTION: if you have a lot of files (>100 GiB), this command may take
 a few days to complete, so doing this in a usual SSH session may not be the best idea.
+Consider using `tmux` or `screen`. Average migration speed for our servers was
+10 GiB/h.
 
 After the command above is completed you can safely remove the original `./files`
 directory (it's not used by the new server). Your previous server config should still work,
diff --git a/setup.py b/setup.py
index 8ffdecf..1151a38 100644
--- a/setup.py
+++ b/setup.py
@@ -1,7 +1,7 @@
 from setuptools import setup, find_packages
 setup(
     name = 'filetracker',
-    version = '2.1',
+    version = '2.1.1',
     author = 'SIO2 Project Team',
     author_email = 'sio2@sio2project.mimuw.edu.pl',
     description = 'Filetracker caching file storage',