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I/O Congestion Avoidance via Routing and Object Placement...

by David A Dillow, Galen M Shipman, Hakki S Oral, Zhe Zhang
Publication Type
Conference Paper
Publication Date
Conference Name
Cray User Group
Conference Location
Fairbanks, Alaska, United States of America
Conference Date
-

As storage systems get larger to meet the the demands of petascale systems, careful planning must be applied to avoid congestion points and extract the maximum performance. In addition, the large size of the data sets generated by such systems makes it desirable for all compute resources in
a center to have common access to this data without needing to copy it to each machine. This paper describes a method of placing I/O close to the storage nodes to minimize contention on Cray's SeaStar2+ network, and extends it to a routed Lustre configuration to gain the same benefits when running against a center-wide file system. Our experiments show performance improvements for both
direct attached and routed file systems.