C-Drive 2009 presentation by Scott DesBles about how Compellent's Data Instant Replay and Data Progression work together to create an efficient data storage system.

1. How Data Instant Replay and Data Progression Work Together Scott DesBles

13. Fast Track – Disk Geometry 20% Amount of drive capacity that provides the fastest data transfer rate Fastest tracks Slowest tracks

14. Traditional Disk Usage New Disk Drive All blocks are written from the outer edge in

15. Traditional Disk Usage Full Disk Drive Active blocks are scattered all over the drive creating reduced performance due to seek and rotational delays Active blocks

16. Fast Track – What It Does Full Disk Drive With Fast Track Active blocks are dynamically and automatically placed on outer edge

21. Data Instant Replay – How It Works A B C D E Time 0 C1 Time 1 READ A READ C Write C1 DATA DIR

26. Data Instant Replay – How It Works C3 E2 A B C1 D E Time 1 C2 E1 READ A READ C2 Write C3 DIR READ E1 Write E2 Time 2 Time 3 DATA DATA C3 E2 Volume 1 Volume 2 READ A READ C2 Write C3 READ E1 Write E2 Time 0 Δ Changes Recovery View

27. Data Instant Replay – How It Works C4 C3 E2 A B C1 D E Time 1 C2 E1 READ A READ C3 Write C4 DIR READ E2 Time 2 Time 4 DATA DATA B1 C3 E2 Volume 1 Volume 2 READ D READ B Write B1 READ E2 Time 0 DIR Δ Changes Δ Changes

28. Data Instant Replay – How It Works C4 C3 E2 A B C1 D E Time 1 A B C2 D E1 READ A READ C4 Write C4 DIR Coalesced Version READ E2 Time 2 Time 4 DATA DATA B1 C3 E2 Volume 1 Volume 2 READ A READ C3 Write C3 READ E2 Write E2 Time 0 DIR Δ Changes Release space back to pool

31. Storage Profile Details

32. Storage Profile Details

33. Custom Storage Profiles