© 2005 TechTarget Storage Magazine Page 5 of 10
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NAS consolidation alternatives
• Available SAN storage can be
used
• Easy single vendor migration
tools
• Upgrade backend or front end
separately
• Capacity and performance
limited to what’s available
behind a gateway
• Large enterprise-class users who
already have a SAN
• Single vendor consolidation
• No SAN requirements, simpler
configuration
• Easy single vendor migration
tools
• Compared to gateways, limit
file system, performance and
capacity may be limited
• All or nothing performance
upgrades
• Small to enterprise-class users
without a SAN
• Single vendor consolidation
• Able to scale out
• Servers performance can be
dialed to whatever is required
• Some vendors have limited or
no support for CIFS
• Large compute cluster users
requiring high performance
access to file data
• Able to scale out
• Parallel file system improves
throughput and performance
• Some vendors don't support
CIFS or have limited NFS
support
• Parallel file access only
available on limited clients and
requires special client software
• Large compute cluster users
requiring high performance
access to file data
• Anybody needing parallel access
to file data
• Heterogeneous box
consolidation
• Single name space over
multiple NAS boxes
• Added overhead
• Additional hardware to install,
configure and maintain
• Multi-box/multi-vendor
environment
• Single name space
configurability/usability
Integrated NAS boxes
If SAN storage support isn't a requirement, a NAS appliance with a NAS
front end and back-end storage integrated into one unit may suffice. It may
be much easier to configure an integrated product than a gateway product
because there are no SAN configuration issues. The following integrated
NAS appliances are typical of products in this category:
* BlueArc Corp.'s Titan SiliconServer supports up to 256TB of NAS
storage with a single file system, and offers enterprise-class capabilities
such as replication and mirroring.
* EMC's NS500 and NS700 NAS series are limited to only 64TB. The
NS500 has file-system size limits compared to the NS700 and NSX
gateways (8TB maximum file system). Aside from configuration and
aggregate performance limitations, NS700 and NS500 capabilities are very
similar to the NSX gateway system using Clariion back-end arrays.
* Sun's StorEdge 5310C is an integrated NAS appliance with 64TB of
capacity (for FC storage). It also supports file system-level and back-end
replication and mirroring, depending on the hardware configuration.
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