Denis Vilfort_Sun_Shifting Gears With SSDs

8/6/2019 Denis Vilfort_Sun_Shifting Gears With SSDs

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SNIA Summer Symposium 2008 Sun Microsystems, Inc.

Shifting Gearswith SSDsSNIA Summer Symposium

Denis Vilfort

2008 Sun Microsystems, Inc.1


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What Well CoverIn the next 45 minutes

Why SSDs Now?

Were do SSDs Fit?

SSDs Impact onNetworked Storage

New ArchitectureDecisions with SSD


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Web 2.0The Long Tail of Data

Online services carry far moreinventory than traditional retailers

Example: Rhapsody caries 56

times as many songs as Wal-Marts 36,000.


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Global Data ContinuumLatency Differentiated Storage Pools


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Where to Store Data?Optimization Trade-Off


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Disk to CPU DiscontinuityTodays CPU have become I/O starved

Moores Law is out-stripping disk drive

rotational speed As a result, systems are

hopelessly unbalanced

between CPU capabilityand storage poolperformance



Enterprise HDD Falling ShortIncreasing Capacity to Performance Mismatch



Storage EvolutionTime for a Change?



Why Applications Dont PerformWaiting for DATA

TodaysMulti-Core, Multi-Socketapplication server design areincreasingly held back by slowstorage

When requesting data, the serverspendsmost of its time waitingfor storage

Application performanceremainsluggishregardless of the ServerCPU horsepower

The traditional remedy of addingmore expensiveDRAM may nolonger sufficeas data sets doubleevery 2 years



Turbo Charged ApplicationsSSDs Eliminate Storage Bottlenecks

TodaysMulti-Core, Multi-Socket

application server design are nowserved by High PerformanceSSDs

The serverno longer waists time

waiting for data Applicationperformance isas

highas the Server CPUshorsepower

No longer need to remedysluggish storage performance byadding expensiveDRAM

Bottom Line:Improved end user experience,faster results & Better ROI



CPU to Storage DiscontinuityThe number of HDDs needed to keep up



SSDs Keep Up w/ CPUMoores Law controls both



New Server Memory Hierarchy



Latency ComparisonBridging the DRAM to HDD Gap

1nS

10nS

100nS

1uS

10uS

100uS

1mS

10mS

100mS

1 S

TAPE

HDDFLASH/

SSD

DRAM

CPU

100,000 X

Latency

Mismatch

150 X

LatencyReduction



Solid State Drives (SSD)Enterprise advantage from commodity FLASH SSD has three major parts:

> A) Controller

> B) DRAM

> C) FLASH bank

Individual FLASH chips arepooled andaddress space virtualized by thecontroller

Controller also performs

> Wear leveling

> CRC

> Bad block mapping

Controller provides the host interfacesuch as SATA, PATA, SAS or FC



Anatomy of an SSDSimilar to HDD Arrays



SSDs Why Now?$/GB Crossover in 2009



SSD to HDD ComparisonSSD for Performance, HDD for Capacity



Where to Deploy SSDs?Storage or Server?



IT SSD Strategy #1HDD Replacement



Modern CPUs are capable of

large amounts of IO HDDs are great capacity devices

- but poor IO devices

SSDs are great IO devices- but costly capacity devices

Balanced System Design> CPU IO = Storage IO

> Capacity = Data Set

Sun Optimized System DesignBest Application Performance



Classic CPU-Storage ImbalanceSunFire x4450 Memory Hierarchy



The Hybrid Storage PoolGaining Performance and Capacity Balance



Building the Hybrid Storage PoolCombining Performance and Capacity


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ZFS Turbo Charges ApplicationsThe Hybrid Storage Pool

ZFS automatically :>Writes new data to a very fast SSD

pool (ZIL)

>Determines data access patterns

andstores frequently accessed

data in the L2ARC

>Bundles IO into sequential lazywrites for moreefficient use of low

cost mechanical disks


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Hybrid Storage Pool EconomicsRight-Size Performance & Capacity


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Standard HDDs Starve ServersCache vs. SATA Storage Pool

Point to Point Switched Backplane

200,000 IOPS

20%

80%

40,000

IOPS

2,688IOPS

42,688IOPS100%

48 X 70 IOPS = 3,360 IOPS


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SSDs Turbo Charges ServersCache vs. Hybrid Storage Pool

Point to Point Switched Backplane

200,000 IOPS

20%

80%

40,000

IOPS

160,000IOPS

200,000IOPS100%

6 X 35,000 IOPS = 210,000 IOPS 42 X 70 IOPS = 2,940 IOPS


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High Performance Storage ServerParallel Hybrid Storage Pools


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High Performance Storage ServerSun Fire X4540 Example

HBA

105K IOPSSSDs

70K IOPS

CPU Complex

380K IOPS


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In Summary

FLASH iscommoditizingdriven by ConsumersElectronics

SSDs will beEverywhere

including the Data CenterwherePowerandPerformanceare concerns

Hybrid Storage Poolsarenow the best strategy and Sun is leading the way

withZFS


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Shifting Gears with SSDs

Thank You

Denis Vilfort

[email protected] (408) 896 4290

2008 Sun Microsystems, Inc.
mailto:[email protected]:[email protected]

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Denis Vilfort_Sun_Shifting Gears With SSDs