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diff --git a/doc/admin-guide/en-US/markdown/admin_managing_volumes.md b/doc/admin-guide/en-US/markdown/admin_managing_volumes.md
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--- a/doc/admin-guide/en-US/markdown/admin_managing_volumes.md
+++ b/doc/admin-guide/en-US/markdown/admin_managing_volumes.md
@@ -366,6 +366,12 @@ layout information so that the files can also go to newly added nodes.
When this command is issued, all the file stat information which is
already cached will get revalidated.
+As of GlusterFS 3.6, the assignment of files to bricks will take into account
+the sizes of the bricks. For example, a 20TB brick will be assigned twice as
+many files as a 10TB brick. In versions before 3.6, the two bricks were
+treated as equal regardless of size, and would have been assigned an equal
+share of files.
+
A fix-layout rebalance will only fix the layout changes and does not
migrate data. If you want to migrate the existing data,
use`# gluster volume rebalance start ` command to rebalance data among