NCEP Central Operations Lesson Learned on WCOSS I/O Management

In July 2013, NOAA operationally transitioned from an IBM P6 AIX High Performance Computing (HPC) system to an IBM iDataPlex Intel Linux HPC system. This transition to a new operating system brought with it some growing pains, especially the management of disk I/O bandwidth. Disk I/O issues included unintended operational impacts due to development usage, sub-optimal segregation of the file system, and ineffective meta-data management. This presentation will provide a summary of the I/O issues NCEP Central Operations encountered, the solutions implemented, and how the lessons learned will be applied in the future.