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  • New servers: fermi-gpfs01 and fermi-gpfs02
    • Dual-connect storage between these two machines
    • Internet connectivity (2 x 10 Gbps per host?)
    • Install GPFS
    • Install xrootd
    • Balance data across xroot cluster
    • Return the 25% storage reserved for NFS back to xrootd
  • New NFS/GPFS service on former fermi-xrd01 and fermi-xrd02 (and wain069, wain071)
    • fermi-xrd01 and fermi-xrd02 
      • Drain xroot data (~180 TB)
      • Swap 2x R610 with SCS-owned R720 machines
      • Rename (fermi-gpfs03 and fermi-gpfs04 ?)
      • Internet connectivity (1 x 10 Gbps per host ?)
      • Decide upon storage configuration
        • Number of spindles for Users/Groups (from wain025)
        • Number of spindles for production partitions (from wain026 and wain032)
        • Number of "spare" spindles for future expansion
      • Install GPFS (total capacity will be ~160 TB)
      • Migrate wain025, wain026, wain032 to new system
    • Select two wains for CNFS service (lots of memory + fast ethernet)
      • Drain xrootd data from wain069 and wain071 (~60 TB, both are unreliable hosts due to the Seagate disks)
      • Swap the 4x1Gb interface with 10Gb nic from wain080 and wain081
      • Rename hosts (fermi-cnfs01, fermi-cnfs02 ?)
      • Install GPFS and CNFS software
      • Configure so that wain025 partitions are handled in such a way that their activities do not negatively impact access to other partitions
  • Upgrade NFS service for LSST
    • Repurpose wain025 to replace wain006
  • Drain xroot from other wains that are to be retired
  • Retirement list:
    • wain026
    • wain032
    • wain006
    • wains that are unreliable (due to Seagate drives?)
      • wain053  (29TB to be moved)
      • wain054  (22TB)
      • wain055  (27TB)
      • wain056  (30TB, total = 108TB)
    • Retirement option:  Given that wain05x are the newest and most powerful Sun servers in the cluster, we might consider swapping physical disks from wain017/019/020/021 with wain053/054/055/056, then retiring the older machines.  Advantages include: newer hardware (~2 years difference), more powerful hardware (12 cores vs 4), more memory (32 GB vs 16), more flexibility if we again repurpose the machines in the future.  Wilko rightfully points out that this option requires more labor.  Is it worth the extra work?

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