[Lustre-discuss] clarification on mkfs.lustre options

[Andreas Dilger]

On 2010-08-02, at 23:06, Sebastian Gutierrez <gutseb at cs.stanford.edu> wrote:
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> I have found some mention on lustre-discuss that using a tool that does a backup of the xattrs is preferable.  I am assuming that the cp -a should be sufficient since it is supposed to preserve all.  In the lustre-discuss articles I only saw a mention of the patched tar and rsync.  Is there any reason not to trust cp?

If your co copies xattrs then great. I would verify this is correct by listing xattrs on both the old and new objects and comparing them. 

In newer Lustre rpms is ll_decode_filter_fid, which will format  the OST object xattrs nicely. 

Cheers, Andreas