Storage Evolution: NAS and SANs Coming Together Page 3


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NAS Thinks Small

With early NAS offerings targeting the mid-size and larger enterprise, EMC has recently turned its focus towards the lower end of the storage market, perhaps aiming for a space typically owned by scrappy NAS competitor Snap Appliance, which Gartner Dataquest shows leading this market in number of units shipped. "You buy one of these things, you plug it into your network and turn it on, and, wow, you have a file server," says Passmore.

Mark Pollard, vice president of marketing and business development at Snap, sees his company's built-in Linux operating system as another differentiator.

"By owning its operating systems, Snap Appliance can make any changes required to enable a new capability or feature," he says. "A great example of that is the embedded anti-virus that was introduced over a year ago ... this would have been impossible if Snap Appliance did not own its operating system."

NAS Imposters?

The other player of note in the NAS market is Microsoft, which, while gaining roughly 20 percent of the market for NAS to date, according to Gartner, doesn't offer a true NAS option.

"What it is, is a special CD with an installation wizard that makes it a little easier to start up Windows as a file server," says Passmore, "but once it's up and running, it's still Windows — you know, the same old, same old."

Final Thoughts

With the distinction between NAS and SAN becoming more and more blurred by the day, a more important distinction may be the protocol(s) you're going to use with your NAS/SAN mix: IP, Fibre Channel, and/or iSCSI.

How to choose among those options depends on your enterprise. "If your application doesn't do very much I/O, or if your server has lots of excess CPU cycles, then the IP network is going to perform very well for you, and you're going to be a happy camper," contends Passmore. In that case, you'd want to deploy a traditional IP-based NAS.

"If, on the other hand, you're pushing your CPU like mad, and you've been using SCSI- or Fibre Channel-based storage, but you're thinking about going to IP-based storage because you've heard all the wonderful hype about how cheap it is, you're in serious trouble," cautions Passmore. If you fall into this category, you'll want to avoid the processor-intensive IP-based NAS and instead choose a Fibre Channel NAS or SAN.

Feature adapted from ServerWatch.

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