Re: Integration of SCST in the mainstream Linux kernel

On Jan 31, 2008 6:14 PM, Nicholas A. Bellinger <nab@xxxxxxxxxxxxxxx> wrote:
Also, with STGT being a pretty new design which has not undergone alot
of optimization, perhaps profiling both pieces of code against similar
tests would give us a better idea of where userspace bottlenecks reside.
Also, the overhead involved with traditional iSCSI for bulk IO from
kernel / userspace would also be a key concern for a much larger set of
users, as iSER and SRP on IB is a pretty small userbase and will
probably remain small for the near future.

Two important trends in data center technology are server
consolidation and storage consolidation. A.o. every web hosting
company can profit from a fast storage solution. I wouldn't call this
a small user base.

Regarding iSER and SRP on IB: InfiniBand is today the most economic
solution for a fast storage network. I do not know which technology
will be the most popular for storage consolidation within a few years
-- this can be SRP, iSER, IPoIB + SDP, FCoE (Fibre Channel over
Ethernet) or maybe yet another technology. No matter which technology
becomes the most popular for storage applications, there will be a
need for high-performance storage software.

References:
* Michael Feldman, Battle of the Network Fabrics, HPCwire, December
2006, http://www.hpcwire.com/hpc/1145060.html
* NetApp, Reducing Data Center Power Consumption Through Efficient
Storage, February 2007,
http://www.netapp.com/ftp/wp-reducing-datacenter-power-consumption.pdf

Bart Van Assche.
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