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Reproducible data corruption, not detected, not corrected. #359

onlyjob opened this issue Dec 22, 2014 · 0 comments


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commented Dec 22, 2014

I've configured both OSDs to verify default Adler32 checksums:

checksums.algorithm = Adler32
checksums.enabled = true

OSDs were restarted and the above settings were confirmed on the DIR server web page.

A bunch of files with known SHA1 digests were written with --replication-policy WaR1 --replication-factor 2 but there is a catch: I've deliberately used HDD with faulty firmware on one OSD to check how well XtreemFS handles corruption in data (i.e. bitrot). Verification of some files failed without raising any errors on client side. No errors appeared in OSD log either.

FYI LizardFS passed similar test where XtreemFS and Ceph are failed...

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