まずはテスト用の移動元ディレクトリとハードリンク化されるファイルを作成。
$ rm -fr ./tmp/rdfind_test_dir
$ mkdir -p ./tmp/rdfind_test_dir
$ for J in $(seq 0 1); do for I in $(seq 0 1); do echo ${J} > ./tmp/rdfind_test_dir/rdfind_inode_group${J}_${I}; done; done;
$ ls -li ./tmp/rdfind_test_dir
total 16
241259 -rw-r--r-- 1 **** **** 2 Feb 12 11:22 rdfind_inode_group0_0
241261 -rw-r--r-- 1 **** **** 2 Feb 12 11:22 rdfind_inode_group0_1
241262 -rw-r--r-- 1 **** **** 2 Feb 12 11:22 rdfind_inode_group1_0
241263 -rw-r--r-- 1 **** **** 2 Feb 12 11:22 rdfind_inode_group1_1
これに対して rdfind を実行。期待通り、group毎に同じinodeに変わった。
$ rdfind -makehardlinks true ./tmp/rdfind_test_dir Now scanning "./tmp/rdfind_test_dir", found 4 files. Now have 4 files in total. Removed 0 files due to nonunique device and inode. Now removing files with zero size from list...removed 0 files Total size is 8 bytes or 8 b Now sorting on size:removed 0 files due to unique sizes from list.4 files left. Now eliminating candidates based on first bytes:removed 0 files from list.4 files left. Now eliminating candidates based on last bytes:removed 0 files from list.4 files left. Now eliminating candidates based on md5 checksum:removed 0 files from list.4 files left. It seems like you have 4 files that are not unique Totally, 4 b can be reduced. Now making results file results.txt Now making hard links. Making 2 links. $ ls -li ./tmp/rdfind_test_dir total 16 241259 -rw-r--r-- 2 **** **** 2 Feb 12 11:22 rdfind_inode_group0_0 241259 -rw-r--r-- 2 **** **** 2 Feb 12 11:22 rdfind_inode_group0_1 241263 -rw-r--r-- 2 **** **** 2 Feb 12 11:22 rdfind_inode_group1_0 241263 -rw-r--r-- 2 **** **** 2 Feb 12 11:22 rdfind_inode_group1_1
以下のケースを考える。すなわち、同じinodeを持つrdfind_inode_group0_{0,1}と、同じinodeを持つrdfind_inode_group1_{0,1}が存在し、これらの内容が全て同じ場合である。これを rdfind で処理した結果を見るとrdfind_inode_group1_?に含まれるファイルに対するリンクが漏れている事がわかる。
$ rm -fr ./tmp/rdfind_test_dir
$ mkdir -p ./tmp/rdfind_test_dir
$ for I in $(seq 0 1); do echo 0 > ./tmp/rdfind_test_dir/rdfind_inode_group${I}_0; ln -f ./tmp/rdfind_test_dir/rdfind_inode_group${I}_{0,1}; done;
$ ls -li ./tmp/rdfind_test_dir
total 16
241259 -rw-r--r-- 2 de de 2 Feb 12 11:40 rdfind_inode_group0_0
241259 -rw-r--r-- 2 de de 2 Feb 12 11:40 rdfind_inode_group0_1
241261 -rw-r--r-- 2 de de 2 Feb 12 11:40 rdfind_inode_group1_0
241261 -rw-r--r-- 2 de de 2 Feb 12 11:40 rdfind_inode_group1_1
$ rdfind -makehardlinks true ./tmp/rdfind_test_dir
Now scanning "./tmp/rdfind_test_dir", found 4 files.
Now have 4 files in total.
Removed 2 files due to nonunique device and inode.
Now removing files with zero size from list...removed 0 files
Total size is 4 bytes or 4 b
Now sorting on size:removed 0 files due to unique sizes from list.2 files left.
Now eliminating candidates based on first bytes:removed 0 files from list.2 files left.
Now eliminating candidates based on last bytes:removed 0 files from list.2 files left.
Now eliminating candidates based on md5 checksum:removed 0 files from list.2 files left.
It seems like you have 2 files that are not unique
Totally, 2 b can be reduced.
Now making results file results.txt
Now making hard links.
Making 1 links.
$ ls -li ./tmp/rdfind_test_dir
total 16
241259 -rw-r--r-- 3 **** **** 2 Feb 12 11:40 rdfind_inode_group0_0
241259 -rw-r--r-- 3 **** **** 2 Feb 12 11:40 rdfind_inode_group0_1
241261 -rw-r--r-- 1 **** **** 2 Feb 12 11:40 rdfind_inode_group1_0
241259 -rw-r--r-- 3 **** **** 2 Feb 12 11:40 rdfind_inode_group1_1