title: How to reduce the default metadata size for an XFS file system?
body: <p>I have a special-purpose 12-disk volume, 48 TB total. After <em>mkfs</em> with default parameters, mounting using inode_64,
  the reported available space for files is 44 TB. So there is 4 TB metadata overhead, almost 10%.</p>
  
  <p>I'm thinking this metadata size is probably intended to accomodate tens of millions of inodes, whereas I use only large files
  and would need 1-2 million files max. Given this, my question is <em>whether it's possible to recover 2-3 TB out of the 4 TB metadata, to use for file data</em>.</p>
  
  <p>In the <a href="http://linux.die.net/man/8/mkfs.xfs" rel="nofollow">man page</a> I see a <em>maxpct</em> option, possibly others, but I cannot figure out what is the correct way to use them
  in my case. I still need to make sure that the volume can hold the 2 million files.
  Also, I understand some metadata space is used for journaling and here I don't know how much would be enough.</p>