[sheepdog] [PATCH] CHANGELOG: add description for hyper-volume.

[Robin Dong]

From: Robin Dong <sanbai at taobao.com>

Add description of the command-line and detail for hyper-volume.

Signed-off-by: Robin Dong <sanbai at taobao.com>
---
 CHANGELOG.md | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/CHANGELOG.md b/CHANGELOG.md
index 568c795..a81a940 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,6 +1,9 @@
 
 ## 0.8.0 (not released yet)
 
+NEW FEATURE:
+ - hyper volume: use B-tree structure to replace index-array in sd_inode so the max size of vdi could extent from 4TB to 16PB.
+
 DOG COMMAND INTERFACE:
  - new subcommand "vdi cache purge" for cleaning stale object cache
   - "vdi cache purge" cleans stale cache of all images
@@ -11,6 +14,7 @@ DOG COMMAND INTERFACE:
   - "node log level get" gets loglevel from running sheep process
   - "node log level list" lists avialable loglevels
  - new option "-o" of "vdi track", for tracking objects with their oids
+ - new option "-y" of "vdi create", for create hyper-volume vdi
 
 SHEEP COMMAND INTERFACE:
  - improvements of help messages
-- 
1.7.12.4