Hardware Reference
In-Depth Information
A backup of the scratch file system exists. Since a copy is written to
tape shortly after creation, there is an alternative if a file is deleted or
corrupted on disk. Usually none of the major government or academic
computing centers have backup scratch file systems.
It helps users manage their disk usage by automatically removing files
that have not been accessed from disk.
Zero effort is required to manage data of completed projects. The data
will automatically migrate off the disk, and if users do request access to
their files at a later date, it is a simple copy from the file system and
the data will be automatically migrated back.
The primary possible disadvantage of this solution is being too aggressive
with removing the data from disk and the users compute jobs are forced to
idle while waiting for data to be staged back in from disk. The size of the
inode pool will not be an issue because ALCF employs GPFS filesets for each
project and the way they are configured, each fileset has its own inode pool.
Bibliography
[1] Argonne Leadership Computing Facility.
http://www.alcf.anl.gov
.
[2] PowerPC A2.
http://en.wikipedia.org/wiki/PowerPC\_A2\#Blue\
_Gene.2FQ
.
[3] U.S. Department of Energy INCITE Leadership Computing.
http://www.
doeleadershipcomputing.org/incite-program/
.
[4] P. Carns, K. Harms, W. Allcock, C. Bacon, S. Lang, R. Latham, and
R. Ross. Understanding and Improving Computational Science Storage
Access through Continuous Characterization. ACM Transactions on Stor-
age (TOS), 7(3):8, 2011.
[5] HPC Advisory Council. Interconnect Analysis: 10GigE and Infiniband in
High Performance Computing.
http://www.hpcadvisorycouncil.com/
pdf/IB\_and\_10GigE\_in\_HPC.pdf
, 2009.
[6] Vitali Morozov. Blue Gene/P Architecture|Getting Started Workshop.
http://press.mcs.anl.gov/gs11/files/2011/01/Vitali\_WSS11.
pdf
, 2011.
[7] Scott Parker. BG/Q Architecture.
http://www.bgconsortium.org/
sites/bgconsortium.drupalgardens.com/files/BGQ-arch.pdf
.
