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A delectable storage plan

By employing new data center technologies to address a storage binge, Krispy Kreme baked up a new back-up scheme.
By Julie Bort , Network World , 02/16/2004
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Krispy Kreme. The words have become a nationwide Pavlovian bell that stimulates cravings for fresh, sticky doughnuts. Although founded in 1937, the company waited until 2000 to go public, after which its confections obtained near cult status and its growth exploded. From 140 stores in 27 states at its IPO, the donut maker now boasts 343 stores in 42 states and four countries, plus other venues such as grocery stores. All this while sales at individual stores have achieved years of double-digit growth.

Such success left Krispy Kreme CIO Frank Hood with a problem: out-of-control storage growth.

Between company-owned and franchise stores, Krispy Kreme's 30-person IT department supports about 1,000 users, many through its extranet for franchisees - Mykrispykreme.com - which gives access to real-time applications such as sales reports and training videos. Some data generated by these 1,000 folks follows easily predictable growth patterns and some doesn't.

For instance, Hood could accurately predict the storage needs for the three data warehouses used to track sales. He simply used data warehouse tools to estimate how many transactions each store was likely to have (the data warehouses store every sales transaction from about the past eight years). But storage for other applications was leaping wildly and unpredictably.

Hood had thrown hardware at the problem, but in fewer than four months, a new 1G-byte disk array had been filled. Clearly, he needed a far better method than server-attached storage to predict and manage the hodgepodge storage arrays Krispy Kreme had begun to accumulate. He needed new data-center storage technologies without spending a fortune.

After examining his options, Hood selected network-attached storage (NAS). He says NAS was a proven technology with advanced management functions, such as self-healing and speedy backup/restore options. Plus, NAS gave him a fast route to virtualized, pooled storage while using his already-paid-for disk arrays.

Specifically, Krispy Kreme deployed Network Appliance's NetApp F825 appliance, which gives the company 2.4T bytes of storage capacity. NetApp SnapShot and SnapRestore software provide data recovery, and Virtual Local Disk software performs virtualization tasks. Rather than Fibre Channel, the company uses the less expensive and easily deployable iSCSI Ethernet-based storage protocol to link e-mail servers and the main SQL datastores to the F825, Hood says. Ethernet connections, from a Nortel Passport 8300 Layer 3 core switch, operate at 1G and 10/100M bit/sec. Users reside on one virtual LAN, taking one of four 1G-bit/sec connections for directory access.

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