1. Pelican: A building block for exascale cold data storage
Shobana Balarishnan, Richard Black, Austin Donnelly, Paul England, Adam Glass, Dave Harper, Sergey Legtchenko, Aaron Ogus, Eric Peterson, Antony Rowstron
Microsoft Research, Microsoft
Adapted from their OSDI and SDC slides.
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2. Background: cold data in the cloud
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3. Background: cold data in the cloud
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4. Right-provisioning
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5. Pelican: rack-scale appliance for cold data
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6. Prototype
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7. Impact of right provisioning on resources
x12 x6
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x16

8. Data placement: maximizing request concurrency
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9. Data placement: maximizing request concurrency
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10. Data placement: maximizing request concurrency
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11. IO scheduling: “spin up is the new seek”
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12. Challenges of right-provisioning
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13. Evaluation
FP: full provisioning
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14. Throughput
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15. Time to first byte
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16. Power consumption
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17. Conclusion Pros and Cons Reduce capital cost and operating cost
Meet requirements from cold data workload
Sensitive to hardware changes
Manually handle many constraints
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18. x4 x2 Related Works Amazon Glacier Facebook cold storage datacenter
Two billion photos
Maybe right-provisioning idea
Blue-ray optical disk x4 x2
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19. Q&A
Thank You!
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