August 22, 2007
Interesting DW information from Walmart…
Most of the article has to do with the Walmart’s purchase of HP servers…but here is some interesting notes on just how big the Walmart Data Warehouse is.
When the world’s largest retailer struggles with a database issue, the numbers can be a bit daunting. Wal-Mart’s data warehouse, for example, is larger than four petabytes. That’s more than 4,096TB, give or take a few million bits. The chain has more than 6,000 stores, with some having almost a half-million SKUs each. You think your Excel spreadsheets are bad? Wal-Mart’s database tables have literally 100 billion rows. The retailer’s POS systems have to ring up some 276 million items, a day.
The 276 million items per day (approximately 1 per every resident of the US) really is amazing.
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