emc dmx vs max.docx

7/29/2019 EMC DMX Vs MAX.docx

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EMC Symmetrix DMX-4 EMC Symmetrix V-Max

Called EMC Symmetrix DMX-4 Called EMC Symmetrix V-Max

DMX: Direct MatrixArchitecture

V-Max: Virtual MatrixArchitecture

Max Capacity: 1 PB RawStorage

Max Capacity: 2 PB of UsableStorage

Max Drives: 1900. On RPQ:2400 max

Max Drives: 2400

EFDs Supported EFDs Supported

Symmetrix ManagementConsole 6.0

Symmetrix ManagementConsole 7.0

Solutions Enabler 6.0 Solutions Enabler 7.0

EFD: 73GB, 146GB, 200GB,400GB

EFD: 200GB, 400GB

FC Drives: 73GB, 146GB,300GB, 400GB, 450GB

FC Drives: 73GB, 146GB,300GB, 400GB

SATA II: 500GB, 1000 GB SATA II: 1000 GB

FC Drive Speed: 10K or 15K FC Drive Speed: 15K

SATA II Drive Speed: 7.2K SATA II Drive Speed: 7.2K

Predecessor of DMX-4 is DMX-3 Predecessor of V-Max is DMX-4

DMX-4 management has got abit easy compared to theprevious generation Symmetrix

Ease of Use with Management atleast with SMC 7.0 or socalled ECC lite

4 Ports per Director 8 Ports per Director

No Engine based concept Engine based concept

24 slots The concept of slots is gone

1 System bay, 9 Storage bays 1 System bay, 10 Storage bays

No engines 8 Engines in one System (serialnumber)


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64 Fiber Channel total ports onall directors for hostconnectivity

128 Fiber Channel total ports ondirectors/engines for hostconnectivity

32 FICON ports for hostconnectivity

64 FICON ports for hostconnectivity

32 GbE iSCSI ports 64 GbE iSCSCI ports

Total Cache: 512GB with 256GB usable (mirrored)

Total Cache: 1024 GB with 512GB usable (mirrored)

Drive interface speed either

2GB or 4GB, drives autonegotiate speed

Drive interface speed 4GB

Green color drive LED means2GB loop speed, Blue colordrive LED means 4GB loopspeed

Only 4GB drive speedsupported.

512 byte style drive (format) 520-byte style drive (8 bytesused for storing data checkinfo). Remember the clariondrive styles, well the datastored in both the cases isdifferent. The 8 bytes used withthe Symmetrix V-Max are thedata integrity field based on thealgorithm D10-TIF standardproposal

FAST: Fully Automated StorageTiering may not be supportedon DMX-4s (most likely sincethe support might come basedon a microcode level ratherthan a hardware level)

FAST: Fully Automated StorageTiering will be supported laterthis year on the V-Max systems

Microcode: 5772 / 5773 runsDMX-4s

Microcode: 5874 runs V-Max

Released in July 2007 Released in April 2009

Concepts of Directors andCache on separate physicalslots / cards

Concept of condensed Directorand Cache on board

DMX-4 Timefinder performancehas been better compared toprevious generation

300% better TImefinderPerformance compared to DMX-4


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No IP Management interfaceinto the Service Processor

IP Management interface to theService Processor, can bemanaged through thecustomers Network IPinfrastructure

Symmetrix ManagementConsole is not charged for until(free) DMX-4

Symmetrix ManagementConsole to be licensed at a coststarting the V-Max systems

Architecture of DMX-4 hasbeen similar to the architectureof its predecessor DMX-3

Architecture of V-Max iscompletely redesigned with thisgeneration and is completelydifferent from the predecessorDMX-4

Microcode 5772 and 5773 hasbe build on previous generationof microcode 5771 and 5772respectively

Microcode 5874 has been buildon base 5773 from previousgeneration DMX-4

No RVA: Raid VirtualArchitecture

Implementation of RVA: RaidVirtual Architecture

Largest supported volume is64GB per LUN

Large Volume Support: 240GBper LUN (Open Systems) and223GB per LUN (MainframeSystems)

128 hypers per Drive (luns perdrive)

512 hypers per Drive (luns perdrive)

Configuration change not asrobust as V-Max Systems

V-Max systems introduced theconcept of concurrentconfiguration change allowingcustomers to perform changemanagement on the V-Maxsystems combined to workthrough single set of scripts

rather than a step basedprocess.

DMX-4 does present somechallenges with mirror

positions

Reduced mirror positions givingcustomers good flexibility for

migration and otheropportunities

No Virtual Provisioning withRAID 5 and RAID 6 devices

Virtual Provisioning allowed nowwith RAID 5 and RAID 6 devices

No Autoprovisioning groups Concept of Autoprovisioninggroups introduced with V-Max


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Systems

Minimum size DMX-4: A single

storage cabinet system,supporting 240 drives can bepurchased with a system

cabinet

Minimum size V-Max SE (single

engine) system can bepurchased with 1 engine and360 drive max.

No concepts of Engine,architecture based on slots

Each Engine consists of 4 QuadCore Intel Chips with either32GB, 64GB or 128GB cache oneach engine with 16 front-endports with each engine. Backendports per engine is 4 portsconnecting System bay tostorage bay

Power PC chips used ondirectors

Intel Quad Core chips used onEngines

Powerpath VE support forVsphere Virtual machines forDMX-4

Powerpath VE supported forVsphere Virtual machines forV-Max

Concept of Backplane existswith this generation of storage

V-Max fits in the category ofModular Storage and eliminatesthe bottle neck of a backplane

DMX-4 was truly sold as ageneration upgrade to DMX-3

V-Max systems have been soldwith a big marketing buzz

around hundreds of engines,

millions of IOPs, TBs of cache,Virtual Storage

Systems cannot be federated The concept of Federation has

been introduced with V-Maxsystems, but systems are notfederated in production orcustomer environments yet

Directors are connected to thesystem through a legacybackplane (DMX DirectMatrix Architecture).

Engines are connected throughcopper RAPID IO interconnect at2.5GB speed

No support for FCOE or 10GBEthernet

No support for FCOE or 10GBEthernet

No support for 8GB loopinterface speeds

No support for 8GB loopinterface speeds

Strong Marketing with DMX-4 Virtual Marketing for VirtualMatrix (V-Max) since the


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and good success product was introduced withFAST as a sales strategy withFAST not available for at leastuntil the later part of the year.

No support for InfiniBand

expected with DMX-4

Would InfiniBand be supported

in the future to connect enginesat a short or long distance(several meters)

No Federation With Federation expected in theupcoming versions of V-Max,how would the cache latencyplay a role if you had federationbetween systems that are 10 to10 meters away?

Global Cache on GlobalMemory Directors

Global Cache on local engineschips: again as cache is shared

between multiple engines,cache latency is expected asmultiple engines request this IO

DMX-4 is a monster storagesystem

The V-Max building blocks(engines) can create a muchlarger storage monster

256GB total vault on DMX-4systems

200GB of vault space perEngine, with 8 engines, we arelooking at 1.6TB of vaultstorage

Performance on DMX-4 hasbeen great compared to itsprevious generation DMX,DMX2, DMX-3

IOPS per PORT of V-MaxSystems

128 MB/s Hits

385 Read

385 WriteIOPS for 2 PORT of V-MaxSystems

128MB/s Hits

635 Read

640 Write

V-Max performs bettercompared to DMX-4 FICON

2.2 x Performance on FICONcompared to DMX-4 Systems.

2 Ports can have as many as


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17000 IOPS on FICON

Large Metadata overhead withthe amount of volumes,devices, cache slots, etc, etc

A reduction of 50 to 75%overhead with the V-Maxrelated to metadata

SRDF Technology Supported New SRDF/EDP (extended

distant protection)

Diskless R21 passthroughdevice, no disk required for thispassthrough

Symmetrix ManagementConsole 6.0 supported, no

templates and wizards

Templates and Wizards withinthe new SMC 7.0 console

Total SRDF Groups supported

128

Total SRDF Groups supported

250

16 Groups on Single Port forSRDF

64 Groups on Single Port forSRDF

V-Max comparison onConnectivity

2X Connectivity compared tothe DMX-4

V-Max comparison on Usability(Storage)

3X usability compared to theDMX-4

DMX-4 was the first version ofSymmetrix where RAID6support was rolled out

RAID 6 is 3.6 times better thanthe DMX-4

RAID6 support on DMX-4 isand was a little premature

RAID 6 on V-Max (performance)is equivalent to RAID 1 on DMX-4

SATA II performance on DMX-4

is better than V-Max

SATA II drives do not support

the 520-byte style. EMC takesthose 8 bytes (520 512) of

calculation for data integrityT10-DIF standard proposal andwrites it in blocks or chunks of64K through out the entire drivecausing performancedegradation.

SATA II performance on DMX-4is better than V-Max

The performance of SATA IIdrives on V-Max is bad theDMX-4 systems

Fiber Channel performancebetter compared to DMX and

DMX-2s.

Fiber Channel performancecompared to DMX-4 improved

by about 36%

DMX-4 start supporting 4GBinterface host connectivity

Fiber Channel performance5000 IOPS per channel

RVA not available on DMX-4platforms

RVA: Raid Virtual Architectureallows to have one mirrorposition for RAID volumesallowing customers to used therest of the 3 positions for eitherBCVs, SRDF, Migration, etc,


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etc.

No MIBE and SIB with DMX-4.Rather the DMX-4 directors areconnected through a commonbackplane.

MIBE: Matrix Interface BoardEnclosure connects the Odd andthe Evens or (Fabric A andFabric B) Directors together.The SIB (System Interface

Board) connects these enginestogether using Rapid IO

Director count goes fromDirector 1 on the left toDirector 18 (Hex) on the right

Director count goes from 1 onthe bottom to 16 (F) on the top,based on each engine having 2directors. 8 Engines, 16Directors.

2 Directors failures if not in thesame fabric or bus, rather arenot DIs (Dual Initiators) ofeach other will not cause asystem outage or data loss /data unavailable

Single engine failure (2Directors) will not cause DataLoss / Data Unavailable and thesystem will not cause anoutage. Failed components canbe Directors, Engines, MIBE,

PSs, Fan, Cache in a singleEngine or 2 directors.

Single loop outages will notcause DU

Single loop outages will notcause DU

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