Merge branch 'master' of ssh://git-annex.branchable.com

doc/bugs/Direct_mode_keeps_re-checksuming_duplicated_files.mdwn

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+##What steps will reproduce the problem?
+
+    mkdir test
+    git init
+    git annex init "test"
+    echo "test" > a
+    echo "test" > b
+    git annex add a b
+    git annex sync
+    git annex direct
+    git annex sync | grep add
+    git annex sync | grep add
+
+##What is the expected output? What do you see instead?
+
+The last two syncs shouldn't need to add or checksum anything.
+Firstly, the output is very confusing because the files have already been added.
+Secondly, the sync can take quite a while if you have lots of duplicates or a lot of files that are incidentally similar.
+
+##What version of git-annex are you using? On what operating system?
+
+git-annex version: 4.20130227 on Archlinux

doc/bugs/Direct_mode_keeps_re-checksuming_duplicated_files/comment_1_cb10385a4f046bfe676720ded3409379._comment

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+[[!comment format=mdwn
+ username="http://joeyh.name/"
+ nickname="joey"
+ subject="comment 1"
+ date="2013-03-11T06:31:09Z"
+ content="""
+It seems that, to fully fix this, direct mode will need to be changed to store multiple inode caches for each key.
+
+Since the files have the same content, but different inodes and/or mtimes, at least one of them is going to appear changed to sync each time.
+
+What currently happens is that the first is re-added, and so its inode cache gets stored, and then that means the second's inode cache no longer matches, and it's re-added, and its inode cache gets stored. Putting the inode cache right back in position to force re-adding the first again..
+
+Storing multiple inode caches appears easy enough, but I have not yet worked out exactly how to clear out old inode caches.
+"""]]