Re: ceph repair details

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Repair does the equivalent of a deep-scrub to find problems.  This mostly is reading object data/omap/xattr to create checksums and compares them across all copies.  When a discrepancy is identified an arbitrary copy which did not have I/O errors is selected and used to re-write the other replicas.


David Zafman
Senior Developer
http://www.inktank.com




On May 25, 2013, at 12:33 PM, Mike Lowe <j.michael.lowe@xxxxxxxxx> wrote:

> Does anybody know exactly what ceph repair does?  Could you list out briefly the steps it takes?  I unfortunately need to use it for an inconsistent pg.
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