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systems support files over a cluster of servers, but also provide for

concurrent file access across the cluster. NAS aggregators group together

multiple NAS boxes under one single management point, aggregating

disparate file-server products under one umbrella.

NAS gateways

Gateways are good for organizations that have SAN infrastructures and

want to consolidate their NAS data onto SAN storage. All of the major NAS

vendors provide tools for data migration from their NAS storage to their

gateway products. Furthermore, support is available for all NAS protocols

and most OS environments. Although gateway performance and capacity

is very good, it falls short compared to some of the available non-traditional

alternatives. Gateways provide more flexibility and scalability compared to

integrated NAS boxes. For example, if you just want to upgrade back-end

storage performance, you can do that separately from the NAS front end

with NAS gateways.

Traditional approaches to NAS consolidation

EMC NAS gateways: EMC recently added the NSX blade server to its

NS700G/NS500G gateway product lines. The NSX is configured using

NAS blades in a chassis, with each blade supporting one or more file

systems. However, files can't be shared across blades. The NSX product

can be configured with a maximum of eight blades supporting 16TB of

storage each for up to 112TB of storage (at least one blade with 16TB

should be configured as a passive standby for failover). NSX has virtual X-

blades useful for physical consolidation without having to change logical

Product

Max File

System

Size

Max

storage

Storage

supported

Snapshot

Remote

mirroring

NDMP

support

BlueArc Titan 256TB 512TB Integrated Yes Yes Yes

EMC NS700 16TB 64TB Integrated Yes Yes Yes

EMC NSX 16TB 112TB EMC Yes Yes Yes

Hewlett PAckard

DL585 (WSS)

16TB 64TB HP, others

VSS, BE-

Snap*

BE-mirrors*

Third party

applications

Network Appliance

F980C

16TB 100TB Integrated Yes Yes Yes

Network Appliance V-

Series

16Tb 98TB

HP, HDS,

IBM

Yes Yes Yes

OnStor and 3PAR

UtiliCat

10TB 384TB 3PAR, others Yes

Via SAN

extenders

Yes

SUN 5310C 16TB 64TB Integrated Yes Yes Yes

*BE-Snap, BE-Mirror, and BE-Snapshot means you need to use the back-end storage or NAS

product to perform snapshots and/or remote mirroring

1 2 3 4 5 6 7 8 9 10

NAS consolidation options 1
VSS, BE 2

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