
10 High Performance Parallel I/O
served over 10 GigE in the case of SAN failures. NERSC is moving toward
a purely IB-based SAN where only the systems with proprietary intercon-
nects will have I/O nodes. The intent is for the IB-based compute systems
to utilize hardware routers to bridge the computational IB and storage IB
networks. This simplifies and centralizes the centerwide parallel file systems
enabling maximum scalability and isolation of problems to either the storage
or compute systems, but not both storage and compute at the same time.
2.2.3 The NERSC Global File Systems
NERSC pioneered the concept of providing a long-term centerwide file
system ...