Slide 6 of 15

File systemsPFS file system

• PFS (Parallel File System) is optimized for:

  • Large amounts of data (files can be > 2 Gbytes)
  • Big read/write request size
    Need at least 256Kbytes
    
    Requests size of 2MByte is near optimal
  • Many nodes doing IO simultaneously (if you are using the async IO API)
  • PFS is /pfs_grande/

• Much more detail available in IO report:

  • http://www.sandia.gov/ASCI/Red/usage/ioreport.ps

Acknowledgement and Disclaimer