[Lustre-discuss] Could I restore OST without EA ?

Tung-Han Hsieh thhsieh at twcp1.phys.ntu.edu.tw
Thu Feb 12 01:47:45 PST 2015

Dear All,

We have a Lustre filesystem (version 1.8.8) in our lab, which
contains several about 20 OSTs and only one MDT. Recently one
of our file server got serious crashed. It contains 4 OSTs
stored in RAID 5. We sent the file server to data rescue company.
They told me that they can rescue all the data files, but the EA
of these files may be lost.

In the Lustre Operational Manual, I learn that to restore the
MDT in filesystem level, we should restore both all the files
as well as their EAs. But how about OST ? Could we restore it
without the EA of files ? I mean, without running this ?

	setfattr --restore=ea.bak

If very fortunately I can restore it without EA, what is the
next I should do to bring the whole filesystem to be in a
consistant state ?

Thank you very much for your help.


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