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Performance of Direct Attached Disk Subsystems

Performance of Direct Attached Disk Subsystems. Roger D. Chamberlain*†, Berkley Shands† * Exegy Inc., St. Louis, MO † Dept. of Computer Science and Engineering, Washington University in St. Louis. Experimental Systems. Platform 1: single 3U enclosure 16 drives @ 500 GB 2 controllers

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Performance of Direct Attached Disk Subsystems

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  1. Performance of Direct Attached Disk Subsystems Roger D. Chamberlain*†, Berkley Shands† * Exegy Inc., St. Louis, MO †Dept. of Computer Science and Engineering, Washington University in St. Louis

  2. Experimental Systems • Platform 1: • single 3U enclosure • 16 drives @ 500 GB • 2 controllers • 8 TB of storage • Platform 2: • three 3U enclosures • 32 drives • 1 controller • 2 SAS expanders • 13 TB of storage

  3. Empirical Performance • Write throughput as a function • of position on the disk • xfs file system • platform 1 • 4 logical drives, 4 disks each • Read throughput as a function • of minimum file size • xfs and ext3 file systems • platform 2 • 8 logical drives, 4 disks each

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