Messages in this thread | | | From | Andreas Dilger <> | Date | Thu, 17 Oct 2002 15:55:05 -0600 | Subject | Re: statfs64 missing |
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On Oct 17, 2002 15:28 -0500, Steven French wrote: > With big SAN based arrays of disks running under some of the high end > CIFS based server appliances from EMC, NetApp etc. it would not be > surprising to me to see an overflow problem for the 32 bit statfs fields > today (mapping from the values in the FILE_SYSTEM_INFO returned by the > server to statfs struct on i386 clients) unless the local fs lies > about the block size. For the cifs vfs adding a statfs64 func would > certainly be technically feasible from the protocol's perspective and > pretty easy.
Yes, I hit this problem a month or two ago with Lustre - the 90TB filesystem we are testing on wrapped and I thought it was a problem in our code until I did some more digging. However, lying about the blocksize isn't a big loss, since we prefer 64kB vector page I/O over the network anyways for performance reasons, even though the backing stores actually use 4kB blocksize.
Cheers, Andreas -- Andreas Dilger http://www-mddsp.enel.ucalgary.ca/People/adilger/ http://sourceforge.net/projects/ext2resize/
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