According to XFS docs, setting crc=1 will only enable CRC validation of
XFS metadata (ie. mtime, xattrs, etc.). Still, nothing guarantees
integrity of the actual data.
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2014-11-25 11:05 GMT+01:00 Denis Kaganovich <mahatma@xxxxxxxxxxxxxx>:
How about XFS journal crc (mkfs stage crc=1)? Somebody trying?
Tomasz Kuzemko писал 2014-11-25 13:01:
_______________________________________________Hello,
as far as I can tell, Ceph does not make any guarantee that reads from
an object return what was actually written to it. In other words, it
does not check data integrity (except doing deep-scrub once every few
days). Considering the fact that BTRFS is not production-ready, not
many people use Ceph on top of ZFS, then the only option to have some
sort of guarantee of integrity is to enable "filestore sloppy crc"
option. Unfortunately the docs aren't too clear about this matter and
"filestore sloppy crc" is not even documented, which is weird
considering it's merged since Emperor.
Getting back to my actual question - what is the state of "filestore
sloppy crc"? Does someone actually use it in production? Are there any
considerations one should make before enabling it? Is it safe to
enable it on an existing cluster?
--
Tomasz Kuzemko
tomasz@xxxxxxxxxxx
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