The Wait Is Over: EMC Unleashes XtremIO All-Flash Storage Array

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Metadata for the XtremIO contents is managed inside the array in an efficient manner, which Rokach said is unusual. "This ensures the metadata is always available, and ensures guaranteed performance," EMC's Rokach said.

That function also helps in provisioning virtualized data centers, he said.

"Virtualization and VDI can create huge backlogs in an array," Rokach said. "We handle it in memory, not in the flash storage, so we get instant cloning and provisioning of desktops and servers."

EMC XtremIO also uses a proprietary data protection scheme, called XDP, which differs from traditional RAID, Rokach said.

"This increases the reliability and endurance of flash memory while using only 8 percent of capacity for overhead," he said. "With flash, you don't want to pay a performance penalty for data protection, because flash is all about performance. And you don't want to pay an efficiency penalty. So we have a data protection scheme with low overhead and high efficiency."

The result, Rokach said, is performance four times better than that of traditional RAID 5 or RAID 6, with four times fewer write operations inside the array.

"It's a magical combination of performance, efficiency and reliability," he said.


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