Hi Xavier,
PPS: We've also been doing some experiments with putting
OpenSolaris+ZFS on some of our generic (Supermicro + Areca) 16-disk
RAID systems, which were originally intended to run Linux.
I think that DESY proved some data corruption with such
configuration, so they switched to OpenSolaris+ZFS.
I'm confused. I am also talking about OpenSolaris+ZFS. What did DESY
try, and what did they switch to?
Sorry, I am indeed not clear. As far as I know, DESY found data
corruption using Linux and Areca cards. They moved from linux to
OpenSolaris and ZFS, avoiding other corruption. This has been discussed
in HEPiX storage workgroup. However, I can not speak on their behalf at
all. I'll try to get you in touch with someone more aware of this issue,
as my statements lack of figures.
I think that would be very interesting to the entire Beowulf mailing list,
so please suggest that they respond to the entire group, not just to me
personally. Here is an LKML thread about silent data corruption:
http://kerneltrap.org/mailarchive/linux-kernel/2007/9/10/191697
So far we have not seen any signs of data corruption on Linux+Areca
systems (and our data files carry both internal and external checksums, so
we would be sensitive to this).
Cheers,
Bruce
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