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Date: Sun, 09 Sep 2012 08:03:44 +0800
From: ching <lsching17@gmail.com>
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Subject: enquiry about defrag
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Hi all,

i am new on btrfs, i am testing KVM on btrfs (host: kernel x86-64 3.5.3), the performance is reasonable.

I have two question on defrag, can someone help me?

1. According to btrfs wiki, defragment a COW file will produce two unrelated files.

    Does it apply to the "autodefrag" mount option?

2. Is there any command for the fragmentation status of a file/dir ? e.g. fragment size, number of fragments.