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Persistent Storage (disk?) Requirements (For The Low End ==the bottom 99%of the market )

Persistent Storage (disk?) Requirements (For The Low End ==the bottom 99%of the market ). Jim Gray Microsoft Research. Zero Latency Price Power Noise Startup Size. Infinite Capacity Bandwidth Shock MTTF. The Ideal Disk. What’s zero? What’s infinite?.

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Persistent Storage (disk?) Requirements (For The Low End ==the bottom 99%of the market )

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  1. Persistent Storage (disk?) Requirements (For The Low End ==the bottom 99%of the market) Jim Gray Microsoft Research

  2. Zero Latency Price Power Noise Startup Size Infinite Capacity Bandwidth Shock MTTF The Ideal Disk

  3. What’s zero?What’s infinite? • 1,000x more or less than current values

  4. Smart Dust • Zero volume (mm3) • Zero power (uw) • MB capacity • Modest bandwidth, latency,… • Cost a penny • Probably mems or electronic. • Trillions units/year

  5. Cell Phone + PDA + Camera + GPS • Zero volume (micro-drive is max) • Zero power (mw) • Zero noise • Instant on (1 second) • 10 GB capacity (camcorder) • Infinite shock • Modest bandwidth/latency (10MBps, 20ms) • Cost a few dollars • 1 billion units/year

  6. Appliances/Games/Toys • Small volume (2” drive is max) • 10GB – 1TB capacity • Zero noise • Instant on (1 second) • Infinite shock • Modest bandwidth/latency (10MBps, 20ms) • House power (so power not a problem) • Cost a few dollars • 1B units/year (games 10% of that)

  7. TabletPC/Laptop • Small volume (2” drive is max) • Less power than display or processor (100 mw) • 1TB capacity (all my stuff) • Zero noise • Instant on (1 second) • Infinite shock • Modest bandwidth/latency (10MBps, 20ms) • Cost a few 10s of dollars • 300 million units/year

  8. Servers(every client byte will be on several servers) • 100TB capacity • 1 hour scan time (==250MBps) • 1 ms access time (1,000 aps) • Infinite MTTF • Low power/heat/cooling • Low noise • Cost a few 10s of dollars • 1B units/year?

  9. Things Microsoft Is Doing to Consume Disks • Intelli-mirror: Transparent client state replication • Terminal Server: Thin client • Versioned file system just like VMS • SnapShots: Copy On Write (COW) file system • Disk replaces tape for backup • Easy remote replicas • Database, Farsite,..

  10. Things Microsoft Is Doing to Consume Disks • Xbox (only game with a disk) • Video apps: • Ultimate TV, PC TV, eHome (Free Style) • Audio apps • Music (Media Player) • IP telephony, • voice recording in tablet, • Speech UI • Photo apps: • Digital cameras …. • Databases • Replication, Sequential search, autoManage

  11. Things Microsoft Is Doing to Consume Disks • Main thrust REDUCE MANAGEMENT COST • Move from 100$/GB/y To 100$/TB/y • 1,000x improvement.

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