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Fri, 07 Dec 2007

Strong checksumms in DST rocks.

Great thanks to person, who suggested me to implement them and Zach Brown, who showed, that Castagnoli crc is a better one than Adler.

I've debugged a setup where system failed to mount XFS filesystem on top of distributed storage, and after turned on strong checksums, system detected they were wrong, so some corruption happend during filesystem setup.
Turning off TSO, RX and TX offload of e1000 nics on machines, which form the storage, fixed the problem.

Strong checksumms rocks!

/devel/dst :: Link / Comments (3)

grange wrote at 2007-12-07 22:56:

no, intel nics suck

anonymous wrote at 2007-12-09 23:15:

great! dst rucls ;)

http://www.lsw.uni-heidelberg.de/users/sbrinkma/pictures/you_rock_you_rule.jpg

May i ask if you are thinking about merging this stuff upstream ? And if you are, do you think to add sync bits before/after merging ? (if you are thinking to add them at all :)

And great thanks to you, for developing this :-)

Zbr wrote at 2007-12-10 15:30:

Eventually probably yes, but not now - I do not hurry and want to clean it up, fix all bugs and complete feature list (including sync bit) first.

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