Anything But a Flash in the Pan

There are only two kinds of storage devices - those that have failed, and those that are about to fail. That's the view most datacenters have about the traditionally mechanical devices pejoratively referred to as "spinning rust." All disk drives fail, cheap drives fail faster. If the average time to fail is five years, you and your laptop can make do with the occasional backup. But when an average enterprise has 100, or 1,000, or increasingly 10,000 or 100,000 individual disk drives, failure is a daily, if not hourly occurrence. Mechanical devices fail. And with failure comes the potential for losing data - using commodity disks to save your boss $500,000 does her no good if she's fined $50,000,000 for violating data retention regulations. Stock transactions, medical images or feature length movies - take your pick, some data has to be perfect. Not a decimal point or pixel out of place. That's exactly why, years ago, Sun invented a storage platform called ZFS. ZFS makes a powerful assumption - that a reliable system must be built from unreliable parts. By using surplus computing cycles, ZFS constantly runs powerful integrity checks, giving data corruption no place to hide. With ZFS, customers can use the cheapest disks and simplest systems, and get exceptional data integrity, along with massive reductions in cost and complexity. But there's a new option on the table, known to many by the memory...

Date: June, 10 2008
Url: http://blogs.sun.com/jonathan/entry/not_a_flash_in_the

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