at the heart of the digital economy (meetbsd california 2014)
DESCRIPTION
The slides for Robert Ryan's presentation, "At the Heart of the Digital Economy – Deep Storage Innovations for New World Datacenter", given at MeetBSD California 2014 in San Jose. A recording of the talk can be seen here: http://bit.ly/1uV3cxCTRANSCRIPT
© 2014 Western Digital Technologies, Inc. All Rights Reserved.
At the Heart of the Digital Economy
Rob RyanWestern Digital Technologist
Deep Storage Innovations for New World Datacenters
Meet BSD
November 2nd 2014
© 2014 Western Digital Technologies, Inc. All Rights Reserved.
At the Heart of the Digital EconomyWe explore the storage device, its ubiquity, and why it’s time to break the mold. Several topics explored that go beyond old school finely tuned block storage machines.
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Deep Storage Innovations for New World Datacenter
© 2014 Western Digital Technologies, Inc. All Rights Reserved.
Progressive Capacity
Capacity and performance are designed with marginThis potential of the product is lost when the product is finalized
Progressive capacity unlocks lost potential for the industry
Provide 100GB increments for higher overall capacity at lower cost
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Deep Storage Innovations for New World Datacenter
6TB5TB 7TB 6TB5TB 7TB
6TB5TB 7TB6TB5TB 7TB
© 2014 Western Digital Technologies, Inc. All Rights Reserved.
Low Spin Speed
Helium adds nice benefit over traditional powerSlower Spindle Speed drops power to half of traditional levelsLatency increased proportional to speed drop
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Deep Storage Innovations for New World Datacenter
Competitor A
Competitor B
Competitor C
Competitor A
Competitor C Helium
WD 4TB Re
WD 6TB Ae
© 2014 Western Digital Technologies, Inc. All Rights Reserved.
Fast Response
Bit Error Rate of one in 1015
reads can take timeIf we quickly respond that this read will take time, the system may recover data elsewhere fasterIf multiple reads are slow, request full recovery of dataWork to do for rules, actions, and health
Deep Storage Innovations for New World Datacenter
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Drive Performance and Reliability vs Error Margin
Log1
0 BE
R
Drive EM level (db)
-4-6
-8
-10
-12
-14-16
-18
-20
-22-24
-260.2 0.4 0.6 0.8 1 1.2 1.4 1.6 1.8 2 2.2 2.4
Soft Error Rate
Client Recoveries ON
Enterprise Recoveries ON
© 2014 Western Digital Technologies, Inc. All Rights Reserved.
ZAC and SMR
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Deep Storage Innovations for New World Datacenter
SMR Category DescriptionDrive Managedaka. Transparent, Type 1 SMR
- No host changes- Device manages all media access requests as it does today.- Some command patterns can cause performance degradation. - Backward compatible
Host Aware - Similar to Drive Managed, but…- New commands to inform host of SMR characteristics and manage zones.- Backward compatible
Host Managedaka. Type 2 SMR
- New device type to host (new interface standard, T10(ZBC)/T13(ZAC))- Host needs software stack changes to write sequentially only.- Device may accommodate some small LBA ranges with random writes
(CMR zones)- Predictable Performance- Not backward compatible
© 2014 Western Digital Technologies, Inc. All Rights Reserved.
Cold Storage
Power Zones can save massive amounts of powerWrite is instantly available utilizing an active power zone“Read seldom” allows recovery in hours or minutes
Scheduled power zone or on demand queue options
Move some hot replicas to cold
Erasure code data for archive
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hot hot
cold
Deep Storage Innovations for New World Datacenter
© 2014 Western Digital Technologies, Inc. All Rights Reserved.
Meet BSD - SummaryThink about what “we” can do to improve the EcosystemProgressive CapacityLower PowerFaster data to the userZAC & SMRCold Storage
Deep Storage Innovations for New World Datacenter
Thank you
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