On Feb 4, 2008 11:57 PM, Jeff Garzik <jeff@garzik.org> wrote:

quoted text
> Networked block devices are attractive because the concepts and
> implementation are more simple than networked filesystems... but usually
> you want to run some sort of filesystem on top.  At that point you might
> as well run NFS or [gfs|ocfs|flavor-of-the-week], and ditch your
> networked block device (and associated complexity).

Running a filesystem on top of iSCSI results in better performance
than NFS, especially if the NFS client conforms to the NFS standard
(=synchronous writes).
By searching the web search for the keywords NFS, iSCSI and
performance I found the following (6 years old) document:
http://www.technomagesinc.com/papers/ip_paper.html. A quote from the
conclusion:
    Our results, generated by running some of industry standard benchmarks,
    show that iSCSI significantly outperforms NFS for situations when
    performing streaming, database like accesses and small file transactions.

Bart Van Assche.
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