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I / O Performance on Cray XC 30
| Content Provider | Semantic Scholar |
|---|---|
| Author | Zhao, Zhengji Petesch, Doug Knaak, David Declerck, Tina |
| Copyright Year | 2014 |
| Abstract | Edison is NERSC's newest petascale Cray XC30 system. Edison has three Lustre file systems deploying the Cray Sonexion storage systems. During the Edison acceptance test period, we measured the system I/O performance on a dedicated system with the IOR benchmark code from the NERSC-6 benchmark suite. After the system entered production, we observed a significant I/O performance degradation for some tests even on a dedicated system. While some performance change is expected due to file system fragmentation and system software and hardware changes, some of the performance degradation was more than expected. In this paper, we analyze the I/O performance we observed on Edison, focusing on understanding the performance change over time. We will also present what we have done to resolve the major performance issue. Ultimately, we want to detect and monitor the I/O performance issues proactively, to effectively mitigate I/O performance variance on a production system. I/O performance; IOR; Lustre; Sonexion; OSTs; I/O bandwidth; read rate |
| File Format | PDF HTM / HTML |
| Alternate Webpage(s) | https://cug.org/proceedings/cug2014_proceedings/includes/files/pap162.pdf |
| Alternate Webpage(s) | http://www.nersc.gov/assets/pubs_presos/Edison-IO-CUG2014-paper-Zhao-4.pdf |
| Alternate Webpage(s) | https://www.nersc.gov/assets/pubs_presos/Edison-IO-CUG2014-paper-Zhao-4.pdf |
| Language | English |
| Access Restriction | Open |
| Content Type | Text |
| Resource Type | Article |
